Population growth and the industrial production modernization have generated considerable water needs.This consumption has led to a disproportionate discharge of untreated wastewater,directly into receiving environmen...Population growth and the industrial production modernization have generated considerable water needs.This consumption has led to a disproportionate discharge of untreated wastewater,directly into receiving environments(Oceans,Rivers,Lakes,Surfaces waters,etc.)and leads to thus promote the spread of waters-borne diseases.The main objective of our present work is the description of the pollutant load of wastewater from the city of Mechraa Belksiri(Kénitra-Morocco),to classify them and identify their composition and their intensity to seek an adequate treatment allowing their subsequent reuse and reducing their dangerousness on their receiving environment Oued Sebou.The analysis of temperature,pH,redox potential,electrical conductivity,dissolved oxygen and salinity are recorded in the field using a portable multiparametric analyzer.The wastewater samples intended for analysis in the laboratory were preserved following the general conservation protocol and handling of samples according to ISO 5667/3.Total Suspended Solids(TSS)are measured by filtration.The analysis of the BOD5 is determined using a BODmeter and the COD,according to DIN 38409-H52.Wastewater from Belksiri town has a pH of 7.2 and an average temperature of 20.5℃ and an electrical conductivity of 3145μs/cm.The average concentration of oxygen is very weak at 0.35 mg/L.Wastewater is loaded with organic matter estimated by Suspended Solid matter(average 446 mg/L),BOD5(280 mg/L)and COD(557 mg/L).The overall pollutant load of wastewater presents satisfactory biodegradability and is well prepared for suitable biological treatment with activated sludge plant.展开更多
BACKGROUND Outcomes of early breast cancer in African women are currently not well defined.AIM To analyze survival outcomes and prognostic factors in Moroccan women with operable breast cancer treated with multimodal ...BACKGROUND Outcomes of early breast cancer in African women are currently not well defined.AIM To analyze survival outcomes and prognostic factors in Moroccan women with operable breast cancer treated with multimodal therapies.METHODS We retrospectively analyzed the data of a large cohort of 400 patients diagnosed with nonmetastatic breast cancer who completed surgery,chemotherapy,and radiotherapy at the National Institute of Oncology in Rabat,from January 2001 to December 2003.RESULTS The mean age at diagnosis was 45 years(range:22-91 years).Surgery was performed in all cases:Mastectomy in 86%and breast-conserving surgery in 14%.Most tumors(>87%)were classified as pathologic T2 stage or higher,and axillary lymph nodes were involved in 75.5%of cases.Ninety-five percent of patients completed six cycles of adjuvant chemotherapy,and all received radiotherapy.At a median follow-up of 74.5 months,the 5-year overall survival(OS)was 82.1%[95%confidence interval(CI):78.1-86.3],and the 5-year disease-free survival was 78.1%(95%CI:73.8-82.6).In univariate analysis,negative nodal status[pN-vs pN+,hazard ratio(HR)=0.34,95%CI:0.16-0.75;P=0.007]and lower American Joint Committee on Cancer(AJCC)stage(Ⅰ-ⅡvsⅢ,HR=0.29,95%CI:0.16-0.52;P<0.001)were significantly associated with better OS.In multivariate analysis,AJCC stageⅠ-Ⅱvs stageⅢremained the strongest predictor of improved OS(HR=0.32,95%CI:0.15-0.67;P=0.002),followed by treatment with anthracyclines vs cyclophosphamide,methotrexate,fluorouracil(CMF;HR=0.58,95%CI:0.35-0.94;P=0.027).CONCLUSION Moroccan women with early breast cancer exhibited more aggressive disease compared to women in high-income countries.AJCC stageⅢwas the strongest predictor of poorer OS,followed by chemotherapy regimen(CMF vs anthracycline).A multimodal treatment approach,including surgery,systemic therapy,and radiotherapy,is essential to improve breast cancer outcomes.展开更多
For around fifty years,the regression and degradation of wetlands were considered so worrying that they were the subject of an international Convention signed on 2 February 1971,in Iran(RAMSAR).This treaty aims to con...For around fifty years,the regression and degradation of wetlands were considered so worrying that they were the subject of an international Convention signed on 2 February 1971,in Iran(RAMSAR).This treaty aims to conserve wetlands meeting criteria of international importance through the notion of rational use of these spaces and their biodiversity.The national and even international value of Lake Sidi Boughaba(Kenitra,Morocco)lies in its biodiversity which allowed its inclusion on the Ramsar list in 1980.This importance motivated us to begin an ecological assessment of the level of its pollution through spatiotemporal monitoring and analysis of physicochemical tracers from surface waters at seven sampling stations between January and December 2023.The waters of Lake Sidi Boughaba are relatively basic(pH=8.63),cold(15.14℃),very hard(64 meq/L),quite turbid(7.65 NTU),very salty(1935.85μs/cm)and well saturated with Calcium ions=312;Magnesium=605;Chlorides=5892;Sulfates=944;Silicates=26(mg/l).Other elements including nitrates(1.29 mg/l),ammonium(1.56 mg/l),fluorides(410μg/l),iron(350μg/l)and manganese(35μg/l)are low.This study concludes that Lake Sidi Boughaba is classified in the category of oligomesotrophic lakes and that it is too threatened by the progressive transformation of its fresh water into brackish water and consequently the change in its benthic and planktonic fauna necessary for food of avian fauna.The study further concludes that this wetland is under significant threat,and to protect its biodiversity,innovative approaches to hydrological development are necessary.展开更多
In Morocco,hydrological and hydrobiological surveys of wadis,river and stream are rare.In this research,we plan to attempt to characterize the physico-chemistry of surface waters of sixteen stations sampled at the lev...In Morocco,hydrological and hydrobiological surveys of wadis,river and stream are rare.In this research,we plan to attempt to characterize the physico-chemistry of surface waters of sixteen stations sampled at the level of the Sebou basin during the period 2013-2023.The diagnosis showed that this natural watercourse is highly enriched in oce-anic salts.A large fluctuation in the chemical nature of the waters was recorded,as well as electrical conductivity(EC),which oscillates between 629 and 22,766μS/cm.Hydrogen Potential ranges from 8.01 to 8.79 while remaining basic.Nitrate(NO3-)concentrations range from a maximum of 886.9 mg/l to a minimum of 0.24 mg/l.Similarly,the am-monium concentration varies from 0.04 to 15.34 mg/l.It was also noted that the waters were very rich in chloride ions(860.27 to 145.55 mg/l),in sodium Na+ion(51 to 2,530 mg/l),in sulfate ions SO4--(441.4 to 37.62 mg/l),in calcium ions Ca2+(97.6 to 1,072.8 mg/l)and in magnesium ions Mg2+(631.2 to 17.28 mg/l)which explains the high hardness of these waters.The concentrations of potassium ions(K+)range from 2.54 to 17.55 mg/l.The high alkalinity is due to the high concentrations of bicarbonate ions(75.64 to 362.34 mg/l).Our study concludes that the waters of the Sebou re-main below the irrigation threshold authorized by Moroccan law when moving away from its Atlantic estuary.They are too degraded and we suggest that urban and industrial wastewater be pre-treated as a priority to reduce natural environment.展开更多
This paper reports on the composition of fungal communities occurring on diseased tissues of Catharanthus roseus,which differed between organs.In total,ten different filamentous fungi were isolated,and the percentage ...This paper reports on the composition of fungal communities occurring on diseased tissues of Catharanthus roseus,which differed between organs.In total,ten different filamentous fungi were isolated,and the percentage of isolation varied significantly among the organs.Botrytis cinerea was the most prevalent fungus found on the plant’s aboveground parts,with a frequency exceeding 50%.On twigs,the occurrence rate was 95.6%.It was isolated from leaves with a frequency of 88%,followed by Aspergillus niger(71.66%),Alternaria alternata(67.33%),Cladosporium herbarum(61%),Fusarium oxysporum(50.66%),Epicoccum nigrum(57.66%),Curvularia lunata(49.66%),Trichoderma harzianum(40%),and Penicillium sp.(27%).Whereas,Fusarium genus was more represented and six species were recorded:F.subglutinans(26%),F.chlamydosporium(20%),F.vertillioides(15.66%),F.solani(10%),F.oxysporum and F.nivale.Results highlighted dissimilar distribution of Fusarium species was noted on Catharanthus tissues on which F.subglutinas,F.chlamydosporium and F.oxysporum coexist on leaves and roots while F.solani was retrieved from leaves against F.nivale from roots.The floral buds and pods harbored opportunist fungi such as B.cinerea,Alternaria alternata and E.nigrum.On roots,Aspergillus,Penicillium and Fusarium were the main genera occurring with the frequencies of 26%(F.chlamydosporium),40%(F.nivale),72.33%(A.niger),47.66%(A.flavus)and 37.66%(A.fumigatus).But no fungal species were detected on seeds of Catharanthus roseus.This is the first study to describe and enumerate the fungal complex associated with various symptoms on the aerial parts of Catharanthus roseus.展开更多
The Mekkam inlier is located 50 km southeast of the town of Taourirt,in northeastern Morocco.It offers a great opportunity for the study of Variscan magmatism in Morocco.This inlier is punctuated by small magmatic bod...The Mekkam inlier is located 50 km southeast of the town of Taourirt,in northeastern Morocco.It offers a great opportunity for the study of Variscan magmatism in Morocco.This inlier is punctuated by small magmatic bodies which we will characterize through a petrographic and geochemical study to situate this inlier in its geotectonic context.The petrographic study revealed the existence of three trends:acidic,intermediate,and basic,which are represented by facies ranging from granites to basanites,including andesites,rhyolites,trachytes,dacites,quartz microdiorites,Aplite and microgranites.All these facies have a mineralogical assemblage dominated by quartz,plagioclase,oligoclase,potassium feldspar,pyroxene,and biotite;the most abundant accessory minerals are zircon and apatite.Green hornblende is found in microdiorites and dacites.The geochemical analysis,conducted through the examination of major elements,trace elements,and rare earth elements,has uncovered the presence of two distinct magmatic series:a calc-alkaline series of the island arc type or active continental margin,and another alkaline series of syn-collision.Based on this combined data,we propose that the Mekkam sector represents a magmatic arc developed within a compressional tectonic regime located above a subduction zone,which was later followed by an intracontinental collision phase.展开更多
The genus Lilium comprises 119 taxa,primarily native to temperate and alpine regions of the Northern Hemisphere,extending to the northern Philippines.In this study,we report the first occurrence of Lilium candidum L.i...The genus Lilium comprises 119 taxa,primarily native to temperate and alpine regions of the Northern Hemisphere,extending to the northern Philippines.In this study,we report the first occurrence of Lilium candidum L.in Morocco,specifically in the jbel Sidi Ali El Jawzi area,within the territorial commune of Asjen,Ouezzane Province(Pre-Rif region).During a botanical survey conducted in May 2022,a population of L.candidum was identified,marking its first recorded presence in the country.Morphological characteristics were analyzed and compared with existing descriptions in the literature to confirm species identification.The species was found in a humid microclimate with calcareous soils,suggesting specific ecological requirements that facilitated its establishment.This unexpected discovery raises several questions regarding its biogeographical history,potential introduction pathways,and adaptation mechanisms in the Moroccan environment.Given its limited distribution and ecological specificity,its conservation status should be carefully evaluated,as human activities,habitat disturbance,and climate change may pose significant threats.Further studies,including genetic analyses and ecological monitoring,are needed to determine its origin,assess population stability,and establish conservation strategies.The presence of L.candidum in the Pre-Rif region expands the known distribution of the species and highlights the importance of continuous botanical exploration in North Africa,particularly in understudied mountainous ecosystems.展开更多
Since it first appeared in 2022,the phenomenon referred to as Colony Collapse Disorder(CCD)has affected several regions of Morocco to varying degrees.In order to assess the possible impact of pesticides on the appeara...Since it first appeared in 2022,the phenomenon referred to as Colony Collapse Disorder(CCD)has affected several regions of Morocco to varying degrees.In order to assess the possible impact of pesticides on the appearance of this syndrome,we conducted a study aimed at evaluating the impact of pesticide use on the emergence of this syndrome through a year-long survey involving 160 beekeepers in the Beni Mellal–Khenifra Region(BKR)who also experienced an unprecedented desertion of hives during the same period.The majority of surveyed beekeepers practice mixed(45%)or migratory beekeeping(42%)and provide supplementary feeding(83.75%)to support their bees.Nearly 37.5%of the hives are located near crops treated with pesticides,exposing the bees to these chemicals.The results showed that the majority of beekeepers reported a cessation of queen laying(74.38%),high mortality rates among worker bees(81.25%),drones(65.63%),and queens(61.88%).Abnormal behaviors such as immobility with trembling(42.50%),reduced flights(47.50%),and disoriented navigation(28.75%)were also observed.Correlation analyses indicate that proximity to treated crops significantly increases the risk of queen laying cessation(Odds Ratio 6.0)and a reduction in waggle dances(Odds Ratio 2.41).Extended foraging flights show a borderline statistical significance(Odds Ratio 2.33),suggesting a disruption of natural food sources.These results highlight the potential impact of pesticides on colony health and bee behavior,pointing out the need to adapt beekeeping practices and implement protective measures against pesticides.展开更多
Objective:This study aims to outline the background of advanced nursing practice(ANP),potential issues,and the prospects for its establishment in the Moroccan health care system.Methods:A review was performed with dat...Objective:This study aims to outline the background of advanced nursing practice(ANP),potential issues,and the prospects for its establishment in the Moroccan health care system.Methods:A review was performed with databases that included articles published between 2016 and 2023.Results:The study found 14 articles agreeing that ANP is a solution to the shortage of medical and nursing staff.Moreover,its establishment in the Moroccan health care system is subject to many challenges,which require an in-depth study.Conclusions:The training of advanced practice nurse(APN)is needed to meet the requirements of the national health care system.It can be incorporated if the context is examined,considering all the challenges that may arise when implementing this program.展开更多
A local case study for the environmental impact of landfill leachate on groundwater quality along and across the Mediouna landfill is presented, based on physicochemical and statistical approaches. The landfill has be...A local case study for the environmental impact of landfill leachate on groundwater quality along and across the Mediouna landfill is presented, based on physicochemical and statistical approaches. The landfill has been operational since 1986 and it receives municipal solid wastes produced by the city of Casablanca, whose the daily waste output exceeds 4000 t. This waste is stockpiled in old sandstone quarries;the site has never been sealed before its opening. The aim of this study is to update the knowledge about groundwater quality around the landfill, to determine the factors controlling the extent of groundwater contamination and compare the results with those of 1989 and 2001. To evaluate groundwater pollution due to this landfill, piezometric level and geochemical analyses have been carried out on 19 wells. The physicochemical data of groundwater down-gradient of the landfill site is showing a deterioration of its quality, to the point that the wells have become unusable. The statistical treatment of physicochemical data by principal components analysis allowed the mapping of three areas downstream of the landfill. The first is hardly polluted, the second is moderately polluted and the third is characterized by mineralization through their waters and the almost absence of organic matter. The extent of groundwater contamination from an area with a radius of 200 m in 1989, to an area with a radius of about 1 km in 2001 to more 2 km as of today. This extension is controlled by the structural factor of faults, by the lithology of aquiferous and the intensity of water pumping;the wells equipped with pumps exert pressure against the advanced front of the pollution.展开更多
The identification of burnt forests and their monitoring provide essential information for the suitable management and conservation of these ecosystems. This research focuses on the use of remote sensing with MODIS se...The identification of burnt forests and their monitoring provide essential information for the suitable management and conservation of these ecosystems. This research focuses on the use of remote sensing with MODIS sensor data in a Mediterranean environment, precisely in the Rif region known for its high occurrence of forest fires and the largest burnt areas in Morocco. It mapped the burnt areas during the summer of 2016 using spectral indices from MODIS images, namely the Normalized Burn Ratio (NBR) and the Burnt Area Index for MODIS (BAIM). Two field surveys were used to calibrate spectral indices and validate the maps. First, a monotemporal analysis using a single pre-fire image determined the appropriate threshold of the spectral indices (BAIM and NBR) for burn detecting. Secondly, a multitemporal method was applied based on dBAIM and dNBR images which represented pre-fire and postfire differences of the BAIM and NBR images, respectively. The results show that separate use of monotemporal postfire and multitemporal methods produced an overestimation of the burnt areas. Finally, we propose a new algorithm combining both methods for burnt area mapping that we name Burnt Area Algorithm. MCD45A1 and MCD64A1 MODIS burnt area products were compared to the proposed algorithm. Validation of the estimated burnt areas using reference data of the Moroccan High Commission for Water, Forests and Fight against Desertification showed satisfactory results using the proposed algorithm, with a determination coefficient of 0.68 and a root mean square error of 44.0 ha.展开更多
This paper systematically investigates and compares the petroleum geology elements and oil and gas exploration potential in the deep-water basins along the conjugate passive margins between Morocco in NW Africa and No...This paper systematically investigates and compares the petroleum geology elements and oil and gas exploration potential in the deep-water basins along the conjugate passive margins between Morocco in NW Africa and Nova Scotia in Canada. Both the deep-water basins along the passive margin in Morocco and its conjugate passive margin deep-water basin in Nova Scotia have undergone similar multiple stages of tectonic evolution. These conjugate basins both have Jurassic and Cretaceous source rocks;Triassic sandstone, Jurassic–Cretaceous carbonate and sandstone, and Miocene–Pliocene sandstone reservoirs;multiple sets of mudstones and regional Triassic salt as caprocks. These characteristics indicate good hydrocarbon accumulation conditions and exploration prospects. The comparison also reveals that the key exploration targets in the deep-water basins of Morocco should be Tertiary turbidite sandstone reservoirs and Jurassic–Cretaceous sandstone and carbonate reservoirs. Compared with the Scotian Basin, the Morocco deep-water basins may have Paleozoic play potential sourced from the mature Silurian hot shale source rock that extends from the onshore NW African Plate. The prospective exploration targets in the deep-water Scotian Basin should be focused on the Jurassic and Cretaceous deep-water turbidite sandstone reservoirs formed by widely-developed large river systems.展开更多
In the last few decades, addressing the global challenge of implementation of strategies for renewable energy and energy efficiency has become crucial.Morocco, since 2009, has made a steadfast commitment to sustainabi...In the last few decades, addressing the global challenge of implementation of strategies for renewable energy and energy efficiency has become crucial.Morocco, since 2009, has made a steadfast commitment to sustainability, with a particular focus on advancing the development of renewable energy resources. A comprehensive strategy has been formulated, centering on utilizing the country's energy potential to drive progress in this vital sector. Morocco is considered a country with abundant thermal water, indicating deep reservoirs with significant hydrothermal potential. Geothermal zones were selected based on the abundance of hot springs where water temperatures were high and geothermal gradients were significant. The abundance and importance of hot springs, combined with recent volcanism and ongoing non-tectonic activity linked to alpine orogeny, strongly suggest that these regions are promising reservoirs for geothermal energy. This great potential also extends to neighboring countries. In northeast and south Morocco, the temperature of thermal water ranges from 26 to 54℃. This study serves as an inclusive review of the geothermal potentialities in Morocco.展开更多
Cenozoic volcanic activity in Morocco started in the Miocene and proceeded, after a short break, during Pliocene and Quaternary. Calc-alkaline magmatic activity occurred first and was accompanied by the eruption of tr...Cenozoic volcanic activity in Morocco started in the Miocene and proceeded, after a short break, during Pliocene and Quaternary. Calc-alkaline magmatic activity occurred first and was accompanied by the eruption of transitional lavas, followed by Plio-Quaternary alkali basaltic activity, which was emplaced within Neogene sedimentary basins of the Rif belt and its foreland. From calc-alkaline to alkaline magmatism, passing through a transitional term, volcanic activities in Morocco formed magnificent outcrops, very diversified in their affinities, their mineral compositions and their geochemistry. The petrographic study and geochemistry of Plio-quaternary volcanic rocks in the areas with high geothermal potential in northeast of Morocco show a dominance of Na-rich basaltic rocks (basanites, basalts, tephrites and basaltic trachy-andesites), followed by trachy-andesites. Most of the samples exhibit an enrichment of large-ion lithophile elements (LILEs) over high-field-strength elements (HFSEs). These results were used to test the global model of Circum-Mediterranean Anorogenic Cenozoic Igneous Province (CiMACI) and the regional model of [1].展开更多
Northeastern Morocco is made up of several units belonging to the Alpine belt and its foreland. Miocene to plio-quaternary volcanic rocks with variable mineralogy and geochemistry dominate the geology of this region. ...Northeastern Morocco is made up of several units belonging to the Alpine belt and its foreland. Miocene to plio-quaternary volcanic rocks with variable mineralogy and geochemistry dominate the geology of this region. The presence of active faults in different directions explains the high tectonic instability and the high frequency of earthquakes. This study contributes to the effort of understanding the geothermal potential of the Northeast of Morocco. Heat source and permeability are both key factors in the geothermal process. Indeed, lineaments analysis constrains the structures and their directions and indicates severely faulted zones, which are the most promising areas for geothermal exploration. For this purpose, we used Landsat data combined with geological and structural maps available in this region. Different image processing techniques were applied including band ratio (6/2) and directional filters. To validate the results, we conducted a comparative study between linear structures, available geological data, and previous studies. Results of the automatic extraction method of lineaments from Landsat 8 OLI/TIRS indicate three main lineament systems: 1) a NE-SW system ranging from N40 to N70;2) an N-S system ranging from N10 to N45;3) an EW to WNW-ESE systems ranging from N80 to N120. Most of lineaments extracted are localized in Kebdana, Amejjaou, Nador and Melilla regions. Compared to previous studies, the NE-SW system is consistent with an extensive period (Tortonian to Pliocene);the NW-SE system is consistent with the last compressive episode (Pliocene);the N-S system is consistent with the first compressive period (Late/End Tortonian).展开更多
This study evaluates the annual loss of soil in the sub-basin of Oued Haricha (Tahaddart basin, Western Rif, NW Morocco). The integration of revised (RUSLE) and modified (MUSLE) soil loss empirical equations of Wischm...This study evaluates the annual loss of soil in the sub-basin of Oued Haricha (Tahaddart basin, Western Rif, NW Morocco). The integration of revised (RUSLE) and modified (MUSLE) soil loss empirical equations of Wischmeier and Smith in combination with GIS permits the modelling of soil erosion at the scale of parcels. The characteristics of precipitation and runoff, the soil properties, the culture system and the current working practices of soil in the sub-basin of the Oued Haricha are collected from local data. The digital terrain model is used to generate topographic factors. The combination of different RUSLE factors shows that the annual soil is 62.72 t/ha/year and corresponds to an average level of risk. The total losses calculated by MUSLE method are valued at 221,468 t/year. The rates of loss due to linear erosion are 82,652 t/year. These soil losses represent 20.33% of the total losses, and confirm that the losses on the slopes outweigh the losses due to the river system. Sedimentation module shows that the areas of high erosion (greater than 200 t/ha/year) are concentrated in the reliefs with average and high slope and occupy 38% of the total area. The deposition areas occupy the centre of sub-basin and constitute 9.12% of the total area. These deposits were concentrated on the edges of major rivers and the outlet of the sub-basin and contributed to siltation of the April 9, 1947 dam.展开更多
OBJECTIVES: To determine the epidemiological features of pulmonary tuberculosis in the region of Gharb-Chrarda-Beni-Hssen in Morocco. METHODS: This is a retrospective study of pulmonary tuberculosis cases, diagnosed a...OBJECTIVES: To determine the epidemiological features of pulmonary tuberculosis in the region of Gharb-Chrarda-Beni-Hssen in Morocco. METHODS: This is a retrospective study of pulmonary tuberculosis cases, diagnosed and treated at the regional diagnostic center of tuberculosis and respiratory diseases (RDCTRD) in Kenitra between January 2010 and December 2011. RESULTS: During the study period, there were 456 cases diagnosed with pulmonary tuberculosis at the RDCTRD, accounting for 51.3% of all tuberculosis cases reported during this period. More than two-thirds were men (69%), with a male-female ratio of 2.22 and 3.3% of cases were children under the age of 15 years. The average age of the patients was 37.07 ± 0.78 years. The average body weight at diagnosis of tuberculosis was 56.20 ± 0.55 kg for all patients. According to the results, 89% of pulmonary tuberculosis cases were microscopically positive. The majority of patients (80.3%) showed signs of tuberculous impregnation. Nearly three-quarters of these cases (71%) were smokers, 21% were cannabis addicts and 7% were alcoholics. Among the 427 cases for whom the outcome was known, 3 (0.7%) of them died. CONCLUSION: Tuberculosis can be controlled by preventing transmission and infection, by stopping the progression from latent infection to active tuberculosis, and by treating active disease.展开更多
In the last two decades,the exploitation of marine renewable energies(70%of the globe is made up of oceans),especially wave energy,has attracted great interest,not only for their high potential,but also for their high...In the last two decades,the exploitation of marine renewable energies(70%of the globe is made up of oceans),especially wave energy,has attracted great interest,not only for their high potential,but also for their high energy density.The development of wave energy is suitable for countries or regions with extensive coastline and high waves approaching the shore.This paper focuses on the study of wave potential and wave energy distribution in the Casablanca-Mohammedia nearshore area(Moroccan Atlantic coast)in order to identify prospective wave energy hotspots.To achieve this purpose,the offshore wave potential was firstly estimated from a 20 years wave data provided by ECMWF(European Center for Medium range Weather Forecasts).In the second step,a numerical modeling of the wave propagation in the study area was performed using the SWAN model jointly with WAVEWATCHIII.The performance of the model to simulate accurately the wave field was evaluated in a real situation characterized by large waves.The model then was applied to determine the patterns of wave field in the Casablanca-Mohammedia nearshore area for a typical wave conditions(winter,summer and storm).The results of this study show the abundance of wave energy in the region with an average annual wave potential of about 22 kW/m.A seasonal variability of the wave resource was demonstrated,with values five times higher in winter than in summer.In addition,a major hotspot site was identified that should be considered when studyingWEC implementation.This hotspot is located at the southern edge of the Casablanca-Mohammedia coast,near the coastal area of Sidi Rahal.展开更多
This study is focused on two types of Moroccan rocks, among the most widely used as building stones: the calcarenite of Salé (CS) and the marble of oued Akrech (MA). The two rocks, lithologically different, show ...This study is focused on two types of Moroccan rocks, among the most widely used as building stones: the calcarenite of Salé (CS) and the marble of oued Akrech (MA). The two rocks, lithologically different, show a clear contrast of their P-wave velocities (Vp): 3.90 vs 5.10 km/s at dry state and 4.29 vs 5.64 km/s at saturation. The “Artificial fractures” created in the two rock types reveal that their Vp undergo diminutions which the rates vary depending of the number and the plane orientation of the fractures. In the CS, Vp shows an increasing of cumulative diminution (Dc) according to the number of fractures, but with a variable rate of unitary diminution (Du) from one fracture to the other. This defines a linear regression with a low coefficient of determination (Dc = 10.18NbFr + 10.96;r2 = 0.87). The mode of the Vp evolution would be related to the roughness of fractures surface, which itself depends upon the petrographic nature of the calcarenite (friable structure, high porosity and heterogenous composition). The MA manifested an increasing Dc with a fairly constant rate of Du from a fracture to another, giving a regression line with a high coefficient of determination (Dc = 12.17NbFr – 10.69;r2 = 0.99). This steady diminution of Vp would be related to the granoblastic texture and the monomineral composition of the marble, which engender smoother fracture surfaces. The rates of Vp diminution also depend on the orientation plane of the fractures relative to the direction of wave propagation. The fractures parallel (θ = 0°) amplify slightly the Vp, playing a significant role of “waveguide”. The fractures oriented at 45° lead to a diminution lower than those of fractures oriented at 25° and 90°. The same trend of diminution, but at variable rates, appears on the samples of the two types of stones at dry and saturated state. This can be explained by the compressive nature of P-waves, which obey the physic laws of the transmission of the constraints in the solid mediums.展开更多
The area of the city of Meknes (Morocco) undergoes anthropic pressure, which acts mainly on the rivers. River water is used, without preliminary treatment, for farm irrigation. A study of the impacts of anthropogenic ...The area of the city of Meknes (Morocco) undergoes anthropic pressure, which acts mainly on the rivers. River water is used, without preliminary treatment, for farm irrigation. A study of the impacts of anthropogenic activities on the distribution and biodiversity of benthic macroinvertebrates and water quality of the Boufekrane River (Meknes) was conducted. Four pristine stations from the upstream and two stations at the downstream receiving anthropogenic impacts were selected along the River. For 12 consecutive months (from January to December 2010), based on the SEQ-V.2 scoring system, water quality index classes, the upstream stations recorded significantly higher biological monitoring scores and better water quality indices than those of the downstream. Four variables are involved actively in the individualization of the physico-chemical environment: COD, dissolved oxygen, TSS and temperature. The total number of macrobenthic taxa and their overall richness indices and diversity indices were significantly higher at the upstream stations than at the downstream stations. The relationships between the physicochemical and the macrobenthic data were investigated by biotypology analysis (PCA and FCA) and Pearson correlation analysis. The analyses showed that the richness and diversity indices were generally influenced by the total suspended solids, chemical oxygen demand and the electric conductivity of the river water. This study also highlighted the impacts of anthropogenic activities on the distribution and species diversity of macrobenthic invertebrate. Some sensitive (Trichoptera and Ephemeroptera) and resistant species (Oligochaeta such as Tubifex sp.) are identified as potential bioindicators of clean and polluted river ecosystems, respectively, in Morocco rivers. The data obtained in this study supported the use of the bioindicator concept (Innovative Biotechniques for controlling water quality) for North Africa rivers because it is more efficient than conventional methods.展开更多
文摘Population growth and the industrial production modernization have generated considerable water needs.This consumption has led to a disproportionate discharge of untreated wastewater,directly into receiving environments(Oceans,Rivers,Lakes,Surfaces waters,etc.)and leads to thus promote the spread of waters-borne diseases.The main objective of our present work is the description of the pollutant load of wastewater from the city of Mechraa Belksiri(Kénitra-Morocco),to classify them and identify their composition and their intensity to seek an adequate treatment allowing their subsequent reuse and reducing their dangerousness on their receiving environment Oued Sebou.The analysis of temperature,pH,redox potential,electrical conductivity,dissolved oxygen and salinity are recorded in the field using a portable multiparametric analyzer.The wastewater samples intended for analysis in the laboratory were preserved following the general conservation protocol and handling of samples according to ISO 5667/3.Total Suspended Solids(TSS)are measured by filtration.The analysis of the BOD5 is determined using a BODmeter and the COD,according to DIN 38409-H52.Wastewater from Belksiri town has a pH of 7.2 and an average temperature of 20.5℃ and an electrical conductivity of 3145μs/cm.The average concentration of oxygen is very weak at 0.35 mg/L.Wastewater is loaded with organic matter estimated by Suspended Solid matter(average 446 mg/L),BOD5(280 mg/L)and COD(557 mg/L).The overall pollutant load of wastewater presents satisfactory biodegradability and is well prepared for suitable biological treatment with activated sludge plant.
文摘BACKGROUND Outcomes of early breast cancer in African women are currently not well defined.AIM To analyze survival outcomes and prognostic factors in Moroccan women with operable breast cancer treated with multimodal therapies.METHODS We retrospectively analyzed the data of a large cohort of 400 patients diagnosed with nonmetastatic breast cancer who completed surgery,chemotherapy,and radiotherapy at the National Institute of Oncology in Rabat,from January 2001 to December 2003.RESULTS The mean age at diagnosis was 45 years(range:22-91 years).Surgery was performed in all cases:Mastectomy in 86%and breast-conserving surgery in 14%.Most tumors(>87%)were classified as pathologic T2 stage or higher,and axillary lymph nodes were involved in 75.5%of cases.Ninety-five percent of patients completed six cycles of adjuvant chemotherapy,and all received radiotherapy.At a median follow-up of 74.5 months,the 5-year overall survival(OS)was 82.1%[95%confidence interval(CI):78.1-86.3],and the 5-year disease-free survival was 78.1%(95%CI:73.8-82.6).In univariate analysis,negative nodal status[pN-vs pN+,hazard ratio(HR)=0.34,95%CI:0.16-0.75;P=0.007]and lower American Joint Committee on Cancer(AJCC)stage(Ⅰ-ⅡvsⅢ,HR=0.29,95%CI:0.16-0.52;P<0.001)were significantly associated with better OS.In multivariate analysis,AJCC stageⅠ-Ⅱvs stageⅢremained the strongest predictor of improved OS(HR=0.32,95%CI:0.15-0.67;P=0.002),followed by treatment with anthracyclines vs cyclophosphamide,methotrexate,fluorouracil(CMF;HR=0.58,95%CI:0.35-0.94;P=0.027).CONCLUSION Moroccan women with early breast cancer exhibited more aggressive disease compared to women in high-income countries.AJCC stageⅢwas the strongest predictor of poorer OS,followed by chemotherapy regimen(CMF vs anthracycline).A multimodal treatment approach,including surgery,systemic therapy,and radiotherapy,is essential to improve breast cancer outcomes.
文摘For around fifty years,the regression and degradation of wetlands were considered so worrying that they were the subject of an international Convention signed on 2 February 1971,in Iran(RAMSAR).This treaty aims to conserve wetlands meeting criteria of international importance through the notion of rational use of these spaces and their biodiversity.The national and even international value of Lake Sidi Boughaba(Kenitra,Morocco)lies in its biodiversity which allowed its inclusion on the Ramsar list in 1980.This importance motivated us to begin an ecological assessment of the level of its pollution through spatiotemporal monitoring and analysis of physicochemical tracers from surface waters at seven sampling stations between January and December 2023.The waters of Lake Sidi Boughaba are relatively basic(pH=8.63),cold(15.14℃),very hard(64 meq/L),quite turbid(7.65 NTU),very salty(1935.85μs/cm)and well saturated with Calcium ions=312;Magnesium=605;Chlorides=5892;Sulfates=944;Silicates=26(mg/l).Other elements including nitrates(1.29 mg/l),ammonium(1.56 mg/l),fluorides(410μg/l),iron(350μg/l)and manganese(35μg/l)are low.This study concludes that Lake Sidi Boughaba is classified in the category of oligomesotrophic lakes and that it is too threatened by the progressive transformation of its fresh water into brackish water and consequently the change in its benthic and planktonic fauna necessary for food of avian fauna.The study further concludes that this wetland is under significant threat,and to protect its biodiversity,innovative approaches to hydrological development are necessary.
文摘In Morocco,hydrological and hydrobiological surveys of wadis,river and stream are rare.In this research,we plan to attempt to characterize the physico-chemistry of surface waters of sixteen stations sampled at the level of the Sebou basin during the period 2013-2023.The diagnosis showed that this natural watercourse is highly enriched in oce-anic salts.A large fluctuation in the chemical nature of the waters was recorded,as well as electrical conductivity(EC),which oscillates between 629 and 22,766μS/cm.Hydrogen Potential ranges from 8.01 to 8.79 while remaining basic.Nitrate(NO3-)concentrations range from a maximum of 886.9 mg/l to a minimum of 0.24 mg/l.Similarly,the am-monium concentration varies from 0.04 to 15.34 mg/l.It was also noted that the waters were very rich in chloride ions(860.27 to 145.55 mg/l),in sodium Na+ion(51 to 2,530 mg/l),in sulfate ions SO4--(441.4 to 37.62 mg/l),in calcium ions Ca2+(97.6 to 1,072.8 mg/l)and in magnesium ions Mg2+(631.2 to 17.28 mg/l)which explains the high hardness of these waters.The concentrations of potassium ions(K+)range from 2.54 to 17.55 mg/l.The high alkalinity is due to the high concentrations of bicarbonate ions(75.64 to 362.34 mg/l).Our study concludes that the waters of the Sebou re-main below the irrigation threshold authorized by Moroccan law when moving away from its Atlantic estuary.They are too degraded and we suggest that urban and industrial wastewater be pre-treated as a priority to reduce natural environment.
文摘This paper reports on the composition of fungal communities occurring on diseased tissues of Catharanthus roseus,which differed between organs.In total,ten different filamentous fungi were isolated,and the percentage of isolation varied significantly among the organs.Botrytis cinerea was the most prevalent fungus found on the plant’s aboveground parts,with a frequency exceeding 50%.On twigs,the occurrence rate was 95.6%.It was isolated from leaves with a frequency of 88%,followed by Aspergillus niger(71.66%),Alternaria alternata(67.33%),Cladosporium herbarum(61%),Fusarium oxysporum(50.66%),Epicoccum nigrum(57.66%),Curvularia lunata(49.66%),Trichoderma harzianum(40%),and Penicillium sp.(27%).Whereas,Fusarium genus was more represented and six species were recorded:F.subglutinans(26%),F.chlamydosporium(20%),F.vertillioides(15.66%),F.solani(10%),F.oxysporum and F.nivale.Results highlighted dissimilar distribution of Fusarium species was noted on Catharanthus tissues on which F.subglutinas,F.chlamydosporium and F.oxysporum coexist on leaves and roots while F.solani was retrieved from leaves against F.nivale from roots.The floral buds and pods harbored opportunist fungi such as B.cinerea,Alternaria alternata and E.nigrum.On roots,Aspergillus,Penicillium and Fusarium were the main genera occurring with the frequencies of 26%(F.chlamydosporium),40%(F.nivale),72.33%(A.niger),47.66%(A.flavus)and 37.66%(A.fumigatus).But no fungal species were detected on seeds of Catharanthus roseus.This is the first study to describe and enumerate the fungal complex associated with various symptoms on the aerial parts of Catharanthus roseus.
文摘The Mekkam inlier is located 50 km southeast of the town of Taourirt,in northeastern Morocco.It offers a great opportunity for the study of Variscan magmatism in Morocco.This inlier is punctuated by small magmatic bodies which we will characterize through a petrographic and geochemical study to situate this inlier in its geotectonic context.The petrographic study revealed the existence of three trends:acidic,intermediate,and basic,which are represented by facies ranging from granites to basanites,including andesites,rhyolites,trachytes,dacites,quartz microdiorites,Aplite and microgranites.All these facies have a mineralogical assemblage dominated by quartz,plagioclase,oligoclase,potassium feldspar,pyroxene,and biotite;the most abundant accessory minerals are zircon and apatite.Green hornblende is found in microdiorites and dacites.The geochemical analysis,conducted through the examination of major elements,trace elements,and rare earth elements,has uncovered the presence of two distinct magmatic series:a calc-alkaline series of the island arc type or active continental margin,and another alkaline series of syn-collision.Based on this combined data,we propose that the Mekkam sector represents a magmatic arc developed within a compressional tectonic regime located above a subduction zone,which was later followed by an intracontinental collision phase.
文摘The genus Lilium comprises 119 taxa,primarily native to temperate and alpine regions of the Northern Hemisphere,extending to the northern Philippines.In this study,we report the first occurrence of Lilium candidum L.in Morocco,specifically in the jbel Sidi Ali El Jawzi area,within the territorial commune of Asjen,Ouezzane Province(Pre-Rif region).During a botanical survey conducted in May 2022,a population of L.candidum was identified,marking its first recorded presence in the country.Morphological characteristics were analyzed and compared with existing descriptions in the literature to confirm species identification.The species was found in a humid microclimate with calcareous soils,suggesting specific ecological requirements that facilitated its establishment.This unexpected discovery raises several questions regarding its biogeographical history,potential introduction pathways,and adaptation mechanisms in the Moroccan environment.Given its limited distribution and ecological specificity,its conservation status should be carefully evaluated,as human activities,habitat disturbance,and climate change may pose significant threats.Further studies,including genetic analyses and ecological monitoring,are needed to determine its origin,assess population stability,and establish conservation strategies.The presence of L.candidum in the Pre-Rif region expands the known distribution of the species and highlights the importance of continuous botanical exploration in North Africa,particularly in understudied mountainous ecosystems.
文摘Since it first appeared in 2022,the phenomenon referred to as Colony Collapse Disorder(CCD)has affected several regions of Morocco to varying degrees.In order to assess the possible impact of pesticides on the appearance of this syndrome,we conducted a study aimed at evaluating the impact of pesticide use on the emergence of this syndrome through a year-long survey involving 160 beekeepers in the Beni Mellal–Khenifra Region(BKR)who also experienced an unprecedented desertion of hives during the same period.The majority of surveyed beekeepers practice mixed(45%)or migratory beekeeping(42%)and provide supplementary feeding(83.75%)to support their bees.Nearly 37.5%of the hives are located near crops treated with pesticides,exposing the bees to these chemicals.The results showed that the majority of beekeepers reported a cessation of queen laying(74.38%),high mortality rates among worker bees(81.25%),drones(65.63%),and queens(61.88%).Abnormal behaviors such as immobility with trembling(42.50%),reduced flights(47.50%),and disoriented navigation(28.75%)were also observed.Correlation analyses indicate that proximity to treated crops significantly increases the risk of queen laying cessation(Odds Ratio 6.0)and a reduction in waggle dances(Odds Ratio 2.41).Extended foraging flights show a borderline statistical significance(Odds Ratio 2.33),suggesting a disruption of natural food sources.These results highlight the potential impact of pesticides on colony health and bee behavior,pointing out the need to adapt beekeeping practices and implement protective measures against pesticides.
文摘Objective:This study aims to outline the background of advanced nursing practice(ANP),potential issues,and the prospects for its establishment in the Moroccan health care system.Methods:A review was performed with databases that included articles published between 2016 and 2023.Results:The study found 14 articles agreeing that ANP is a solution to the shortage of medical and nursing staff.Moreover,its establishment in the Moroccan health care system is subject to many challenges,which require an in-depth study.Conclusions:The training of advanced practice nurse(APN)is needed to meet the requirements of the national health care system.It can be incorporated if the context is examined,considering all the challenges that may arise when implementing this program.
文摘A local case study for the environmental impact of landfill leachate on groundwater quality along and across the Mediouna landfill is presented, based on physicochemical and statistical approaches. The landfill has been operational since 1986 and it receives municipal solid wastes produced by the city of Casablanca, whose the daily waste output exceeds 4000 t. This waste is stockpiled in old sandstone quarries;the site has never been sealed before its opening. The aim of this study is to update the knowledge about groundwater quality around the landfill, to determine the factors controlling the extent of groundwater contamination and compare the results with those of 1989 and 2001. To evaluate groundwater pollution due to this landfill, piezometric level and geochemical analyses have been carried out on 19 wells. The physicochemical data of groundwater down-gradient of the landfill site is showing a deterioration of its quality, to the point that the wells have become unusable. The statistical treatment of physicochemical data by principal components analysis allowed the mapping of three areas downstream of the landfill. The first is hardly polluted, the second is moderately polluted and the third is characterized by mineralization through their waters and the almost absence of organic matter. The extent of groundwater contamination from an area with a radius of 200 m in 1989, to an area with a radius of about 1 km in 2001 to more 2 km as of today. This extension is controlled by the structural factor of faults, by the lithology of aquiferous and the intensity of water pumping;the wells equipped with pumps exert pressure against the advanced front of the pollution.
基金the Faculty of Science and Technology of Beni Mellal for their logistical and financial support for the PhD project No. RNES44/13
文摘The identification of burnt forests and their monitoring provide essential information for the suitable management and conservation of these ecosystems. This research focuses on the use of remote sensing with MODIS sensor data in a Mediterranean environment, precisely in the Rif region known for its high occurrence of forest fires and the largest burnt areas in Morocco. It mapped the burnt areas during the summer of 2016 using spectral indices from MODIS images, namely the Normalized Burn Ratio (NBR) and the Burnt Area Index for MODIS (BAIM). Two field surveys were used to calibrate spectral indices and validate the maps. First, a monotemporal analysis using a single pre-fire image determined the appropriate threshold of the spectral indices (BAIM and NBR) for burn detecting. Secondly, a multitemporal method was applied based on dBAIM and dNBR images which represented pre-fire and postfire differences of the BAIM and NBR images, respectively. The results show that separate use of monotemporal postfire and multitemporal methods produced an overestimation of the burnt areas. Finally, we propose a new algorithm combining both methods for burnt area mapping that we name Burnt Area Algorithm. MCD45A1 and MCD64A1 MODIS burnt area products were compared to the proposed algorithm. Validation of the estimated burnt areas using reference data of the Moroccan High Commission for Water, Forests and Fight against Desertification showed satisfactory results using the proposed algorithm, with a determination coefficient of 0.68 and a root mean square error of 44.0 ha.
基金the National Science and Technology Major Project Foundation of China(Nos.2017ZX05001-005,2016ZX05029-001)the National Natural Science Foundation of China(No.41728004)。
文摘This paper systematically investigates and compares the petroleum geology elements and oil and gas exploration potential in the deep-water basins along the conjugate passive margins between Morocco in NW Africa and Nova Scotia in Canada. Both the deep-water basins along the passive margin in Morocco and its conjugate passive margin deep-water basin in Nova Scotia have undergone similar multiple stages of tectonic evolution. These conjugate basins both have Jurassic and Cretaceous source rocks;Triassic sandstone, Jurassic–Cretaceous carbonate and sandstone, and Miocene–Pliocene sandstone reservoirs;multiple sets of mudstones and regional Triassic salt as caprocks. These characteristics indicate good hydrocarbon accumulation conditions and exploration prospects. The comparison also reveals that the key exploration targets in the deep-water basins of Morocco should be Tertiary turbidite sandstone reservoirs and Jurassic–Cretaceous sandstone and carbonate reservoirs. Compared with the Scotian Basin, the Morocco deep-water basins may have Paleozoic play potential sourced from the mature Silurian hot shale source rock that extends from the onshore NW African Plate. The prospective exploration targets in the deep-water Scotian Basin should be focused on the Jurassic and Cretaceous deep-water turbidite sandstone reservoirs formed by widely-developed large river systems.
文摘In the last few decades, addressing the global challenge of implementation of strategies for renewable energy and energy efficiency has become crucial.Morocco, since 2009, has made a steadfast commitment to sustainability, with a particular focus on advancing the development of renewable energy resources. A comprehensive strategy has been formulated, centering on utilizing the country's energy potential to drive progress in this vital sector. Morocco is considered a country with abundant thermal water, indicating deep reservoirs with significant hydrothermal potential. Geothermal zones were selected based on the abundance of hot springs where water temperatures were high and geothermal gradients were significant. The abundance and importance of hot springs, combined with recent volcanism and ongoing non-tectonic activity linked to alpine orogeny, strongly suggest that these regions are promising reservoirs for geothermal energy. This great potential also extends to neighboring countries. In northeast and south Morocco, the temperature of thermal water ranges from 26 to 54℃. This study serves as an inclusive review of the geothermal potentialities in Morocco.
文摘Cenozoic volcanic activity in Morocco started in the Miocene and proceeded, after a short break, during Pliocene and Quaternary. Calc-alkaline magmatic activity occurred first and was accompanied by the eruption of transitional lavas, followed by Plio-Quaternary alkali basaltic activity, which was emplaced within Neogene sedimentary basins of the Rif belt and its foreland. From calc-alkaline to alkaline magmatism, passing through a transitional term, volcanic activities in Morocco formed magnificent outcrops, very diversified in their affinities, their mineral compositions and their geochemistry. The petrographic study and geochemistry of Plio-quaternary volcanic rocks in the areas with high geothermal potential in northeast of Morocco show a dominance of Na-rich basaltic rocks (basanites, basalts, tephrites and basaltic trachy-andesites), followed by trachy-andesites. Most of the samples exhibit an enrichment of large-ion lithophile elements (LILEs) over high-field-strength elements (HFSEs). These results were used to test the global model of Circum-Mediterranean Anorogenic Cenozoic Igneous Province (CiMACI) and the regional model of [1].
文摘Northeastern Morocco is made up of several units belonging to the Alpine belt and its foreland. Miocene to plio-quaternary volcanic rocks with variable mineralogy and geochemistry dominate the geology of this region. The presence of active faults in different directions explains the high tectonic instability and the high frequency of earthquakes. This study contributes to the effort of understanding the geothermal potential of the Northeast of Morocco. Heat source and permeability are both key factors in the geothermal process. Indeed, lineaments analysis constrains the structures and their directions and indicates severely faulted zones, which are the most promising areas for geothermal exploration. For this purpose, we used Landsat data combined with geological and structural maps available in this region. Different image processing techniques were applied including band ratio (6/2) and directional filters. To validate the results, we conducted a comparative study between linear structures, available geological data, and previous studies. Results of the automatic extraction method of lineaments from Landsat 8 OLI/TIRS indicate three main lineament systems: 1) a NE-SW system ranging from N40 to N70;2) an N-S system ranging from N10 to N45;3) an EW to WNW-ESE systems ranging from N80 to N120. Most of lineaments extracted are localized in Kebdana, Amejjaou, Nador and Melilla regions. Compared to previous studies, the NE-SW system is consistent with an extensive period (Tortonian to Pliocene);the NW-SE system is consistent with the last compressive episode (Pliocene);the N-S system is consistent with the first compressive period (Late/End Tortonian).
文摘This study evaluates the annual loss of soil in the sub-basin of Oued Haricha (Tahaddart basin, Western Rif, NW Morocco). The integration of revised (RUSLE) and modified (MUSLE) soil loss empirical equations of Wischmeier and Smith in combination with GIS permits the modelling of soil erosion at the scale of parcels. The characteristics of precipitation and runoff, the soil properties, the culture system and the current working practices of soil in the sub-basin of the Oued Haricha are collected from local data. The digital terrain model is used to generate topographic factors. The combination of different RUSLE factors shows that the annual soil is 62.72 t/ha/year and corresponds to an average level of risk. The total losses calculated by MUSLE method are valued at 221,468 t/year. The rates of loss due to linear erosion are 82,652 t/year. These soil losses represent 20.33% of the total losses, and confirm that the losses on the slopes outweigh the losses due to the river system. Sedimentation module shows that the areas of high erosion (greater than 200 t/ha/year) are concentrated in the reliefs with average and high slope and occupy 38% of the total area. The deposition areas occupy the centre of sub-basin and constitute 9.12% of the total area. These deposits were concentrated on the edges of major rivers and the outlet of the sub-basin and contributed to siltation of the April 9, 1947 dam.
文摘OBJECTIVES: To determine the epidemiological features of pulmonary tuberculosis in the region of Gharb-Chrarda-Beni-Hssen in Morocco. METHODS: This is a retrospective study of pulmonary tuberculosis cases, diagnosed and treated at the regional diagnostic center of tuberculosis and respiratory diseases (RDCTRD) in Kenitra between January 2010 and December 2011. RESULTS: During the study period, there were 456 cases diagnosed with pulmonary tuberculosis at the RDCTRD, accounting for 51.3% of all tuberculosis cases reported during this period. More than two-thirds were men (69%), with a male-female ratio of 2.22 and 3.3% of cases were children under the age of 15 years. The average age of the patients was 37.07 ± 0.78 years. The average body weight at diagnosis of tuberculosis was 56.20 ± 0.55 kg for all patients. According to the results, 89% of pulmonary tuberculosis cases were microscopically positive. The majority of patients (80.3%) showed signs of tuberculous impregnation. Nearly three-quarters of these cases (71%) were smokers, 21% were cannabis addicts and 7% were alcoholics. Among the 427 cases for whom the outcome was known, 3 (0.7%) of them died. CONCLUSION: Tuberculosis can be controlled by preventing transmission and infection, by stopping the progression from latent infection to active tuberculosis, and by treating active disease.
文摘In the last two decades,the exploitation of marine renewable energies(70%of the globe is made up of oceans),especially wave energy,has attracted great interest,not only for their high potential,but also for their high energy density.The development of wave energy is suitable for countries or regions with extensive coastline and high waves approaching the shore.This paper focuses on the study of wave potential and wave energy distribution in the Casablanca-Mohammedia nearshore area(Moroccan Atlantic coast)in order to identify prospective wave energy hotspots.To achieve this purpose,the offshore wave potential was firstly estimated from a 20 years wave data provided by ECMWF(European Center for Medium range Weather Forecasts).In the second step,a numerical modeling of the wave propagation in the study area was performed using the SWAN model jointly with WAVEWATCHIII.The performance of the model to simulate accurately the wave field was evaluated in a real situation characterized by large waves.The model then was applied to determine the patterns of wave field in the Casablanca-Mohammedia nearshore area for a typical wave conditions(winter,summer and storm).The results of this study show the abundance of wave energy in the region with an average annual wave potential of about 22 kW/m.A seasonal variability of the wave resource was demonstrated,with values five times higher in winter than in summer.In addition,a major hotspot site was identified that should be considered when studyingWEC implementation.This hotspot is located at the southern edge of the Casablanca-Mohammedia coast,near the coastal area of Sidi Rahal.
文摘This study is focused on two types of Moroccan rocks, among the most widely used as building stones: the calcarenite of Salé (CS) and the marble of oued Akrech (MA). The two rocks, lithologically different, show a clear contrast of their P-wave velocities (Vp): 3.90 vs 5.10 km/s at dry state and 4.29 vs 5.64 km/s at saturation. The “Artificial fractures” created in the two rock types reveal that their Vp undergo diminutions which the rates vary depending of the number and the plane orientation of the fractures. In the CS, Vp shows an increasing of cumulative diminution (Dc) according to the number of fractures, but with a variable rate of unitary diminution (Du) from one fracture to the other. This defines a linear regression with a low coefficient of determination (Dc = 10.18NbFr + 10.96;r2 = 0.87). The mode of the Vp evolution would be related to the roughness of fractures surface, which itself depends upon the petrographic nature of the calcarenite (friable structure, high porosity and heterogenous composition). The MA manifested an increasing Dc with a fairly constant rate of Du from a fracture to another, giving a regression line with a high coefficient of determination (Dc = 12.17NbFr – 10.69;r2 = 0.99). This steady diminution of Vp would be related to the granoblastic texture and the monomineral composition of the marble, which engender smoother fracture surfaces. The rates of Vp diminution also depend on the orientation plane of the fractures relative to the direction of wave propagation. The fractures parallel (θ = 0°) amplify slightly the Vp, playing a significant role of “waveguide”. The fractures oriented at 45° lead to a diminution lower than those of fractures oriented at 25° and 90°. The same trend of diminution, but at variable rates, appears on the samples of the two types of stones at dry and saturated state. This can be explained by the compressive nature of P-waves, which obey the physic laws of the transmission of the constraints in the solid mediums.
文摘The area of the city of Meknes (Morocco) undergoes anthropic pressure, which acts mainly on the rivers. River water is used, without preliminary treatment, for farm irrigation. A study of the impacts of anthropogenic activities on the distribution and biodiversity of benthic macroinvertebrates and water quality of the Boufekrane River (Meknes) was conducted. Four pristine stations from the upstream and two stations at the downstream receiving anthropogenic impacts were selected along the River. For 12 consecutive months (from January to December 2010), based on the SEQ-V.2 scoring system, water quality index classes, the upstream stations recorded significantly higher biological monitoring scores and better water quality indices than those of the downstream. Four variables are involved actively in the individualization of the physico-chemical environment: COD, dissolved oxygen, TSS and temperature. The total number of macrobenthic taxa and their overall richness indices and diversity indices were significantly higher at the upstream stations than at the downstream stations. The relationships between the physicochemical and the macrobenthic data were investigated by biotypology analysis (PCA and FCA) and Pearson correlation analysis. The analyses showed that the richness and diversity indices were generally influenced by the total suspended solids, chemical oxygen demand and the electric conductivity of the river water. This study also highlighted the impacts of anthropogenic activities on the distribution and species diversity of macrobenthic invertebrate. Some sensitive (Trichoptera and Ephemeroptera) and resistant species (Oligochaeta such as Tubifex sp.) are identified as potential bioindicators of clean and polluted river ecosystems, respectively, in Morocco rivers. The data obtained in this study supported the use of the bioindicator concept (Innovative Biotechniques for controlling water quality) for North Africa rivers because it is more efficient than conventional methods.
