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Spatio-temporal variations in air/ground freezing–thawing indices along the China–Nepal Highway during 1987–2017
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作者 ZHANG Tianqi LUO Tao +2 位作者 ZHANG Chonglei YU Wenbing PEI Wansheng 《Journal of Mountain Science》 2025年第2期521-536,共16页
Freezing–thawing indices serve as a comprehensive indicator of both the duration of the freezing/thawing periods and the degree of cold and heat in a given region.In-depth analysis of the freezing-thawing indices not... Freezing–thawing indices serve as a comprehensive indicator of both the duration of the freezing/thawing periods and the degree of cold and heat in a given region.In-depth analysis of the freezing-thawing indices not only enables the prediction of permafrost distribution and its dynamic changes,but also facilitates the assessment of damage risk to infrastructure under freeze-thaw action.In this paper,the air/ground freezing–thawing indices from 1987 to 2017,based on daily temperature observations from meteorological stations along the China–Nepal Highway(CNH),were calculated,and their spatial and temporal variation patterns were analyzed.The results showed that:(1)Both mean annual air temperature and mean annual ground surface temperature along the CNH fluctuated upward,with climate tendency rates of 0.43 and 0.52.C·(10a)~(-1),respectively;(2)The number of days with negative air temperature and ground temperature showed fluctuated downward,with change rates of-8.6 and-8.3 d·(10a)~(-1),respectively;(3)The ranges of air freezing index,air thawing index,ground freezing index,and ground thawing index over the years were 157.05-458.88°C·d,2034.20-2560.73°C·d,108.78-396.83°C·d,and 3515.25-4288.67°C·d,respectively.The climate tendency rates were-5.42,10.22,-6.79,and 12.14.C·d·a-1,respectively,showing a general warming trend;(4)The air freezing index,ground freezing index,and ground thawing index changed abruptly in 1999,2000,and 2002,respectively,evincing significant changes after 2002.The research results can provide a basis for the risk assessment of freezing–thawing erosion and the prevention and control of permafrost engineering diseases along the CNH. 展开更多
关键词 China–nepal Transportation Corridor China–nepal Highway Freezing–thawing indices Spatio–temporal change
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Factors affecting smallholder farmers'adaptive capacity to climate change:A comparative study of Nepal,India,and Bangladesh
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作者 CHAPAGAIN Prem Sagar BANSKOTA Tibendra Raj +9 位作者 SHRESTHA Shobha ZHANG Yili YAN Jianzhong RAI Suresh Chand ISLAM Md Nurul LIU Linshan MANDAL Umesh Kumar PAUDEL Basanta KHANAL Narendra Raj THASINEKU Om Chandra 《Journal of Geographical Sciences》 2025年第2期359-381,共23页
Agriculture,significantly impacted by climate change and climate variability,serves as the primary livelihood for smallholder farmers in South Asia.This study aims to examine and evaluate the factors influencing small... Agriculture,significantly impacted by climate change and climate variability,serves as the primary livelihood for smallholder farmers in South Asia.This study aims to examine and evaluate the factors influencing smallholder farmers'adaptive capacity(AC)in addressing these risks through surveys from 633 households across Nepal,India,and Bangladesh.The findings reveal that AC is influenced by various indicators categorized under eight principal factors.The first three factors,which explain about one-third of the variance in each country,include distinct significant indicators for each nation:in Nepal,these indicators are landholding size,skill-development training,knowledge of improved seed varieties,number of income sources,access to markets,and access to financial institutions;in India,they encompass ac-cess to agricultural-input information,knowledge of seed varieties,access to markets,access to crop insurance,changing the sowing/harvesting times of crops,and access to financial ser-vices;in Bangladesh,the key factors are access to financial institutions,community coopera-tion,changing the sowing/harvesting times of crops,knowledge of improved seed varieties,and access to agricultural-input information.Notably,indicators such as trust in weather in-formation,changing sowing/harvesting times of crops,and crop insurance were identified as important determinants of AC,which have been overlooked in previous studies. 展开更多
关键词 climate change rain-fed agriculture SMALLHOLDER adaptive capacity PCA nepal INDIA BANGLADESH
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"Faxian-Xuanzang Scholarship Fund"Officially Launched in Nepal
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《International Understanding》 2025年第2期63-63,共1页
The inaugural"Belt and Road Nepal-China Buddhist Culture and Art Summit Forum"was held at the Lumbini Buddhist University in Nepal.The"Faxian-Xuanzang Scholarship Fund",jointly established by the C... The inaugural"Belt and Road Nepal-China Buddhist Culture and Art Summit Forum"was held at the Lumbini Buddhist University in Nepal.The"Faxian-Xuanzang Scholarship Fund",jointly established by the Chinese Culture Promotion Society and the Lumbini Buddhist University,was officially launched during the forum.The programme aims to support 100 Chinese and Nepali students in the next three years in conducting specialised research in such fields as Buddhist art and historical scripts. 展开更多
关键词 chinese culture promotion society Lumbini Buddhist University nepal China Buddhist Culture Art Summit Forum buddhist art historical scripts Belt Road Buddhist Art nepali Faxian Xuanzang Scholarship Fund
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A New Species of the Genus Placidus Distant (Homoptera: Cicadellidae: Stegel ytrinae) from Nepal 被引量:2
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作者 魏琮 张雅林 《Entomotaxonomia》 CSCD 北大核心 2003年第2期91-94,共4页
A new species, Placidus incurvatus sp. nov. from Nepal is described and the genus is placed in Stegelytrinae, new placement.
关键词 HOMOPTERA CICADELLIDAE Placidus new species new placement nepal
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Improved Charcoal Production for Environment and Economics of Blacksmiths: Evidence from Nepal
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作者 Rishi Ram Kattel 《Journal of Agricultural Science and Technology(B)》 2015年第3期197-204,共8页
Blacksmiths in Nepal are marginalized and disadvantaged occupational caste, however, very popular for their handicraft works mainly in making iron tools and equipments. With the advancement of technology, there have b... Blacksmiths in Nepal are marginalized and disadvantaged occupational caste, however, very popular for their handicraft works mainly in making iron tools and equipments. With the advancement of technology, there have been many innovative technologies in many other sectors, but blacksmiths in Nepal are still dependent on their indigenous and conventional practices which have direct negative consequences for environment, biodiversity conservation and health. Recently, improved charcoal production technology has been implemented among the 77 blacksmith households in Sindhupalchowk district as a pilot project. However, there is little research about the impact of improved charcoal production on forest resources conservation and people's livelihoods. This study therefore made an effort to explore the impact of improved charcoal production technology and firewood consumption on conserving the environment and promoting sustainable livelihood of marginalized households in rural areas of Nepal. Findings of the study revealed that improved charcoal production technology has positive impacts on forest tree conservation by reducing the fuel wood consumption up to 40% with 60% energy efficiency as compared to the traditional system. The improved charcoal production pilot project has reduced annual CO2, CH4 and CO emissions in the study area by 2.4-3.1, 3.3-4.3 and 2.6-3.5 tons, respectively. Furthermore, improved charcoal production system increases blacksmiths' welfare through generating social, human and economic capital and quality attributes like environmental sustainability. Introducing improved charcoal production and controlling heavy firewood collection at rural villages of Nepal will help to increase carbon sequestration and reduce the sources of carbon emission in context of global climate change. 展开更多
关键词 BLACKSMITH charcoal climate change nepal.
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Damage characteristics and seismic capacity of buildings during Nepal M_s 8.1 earthquake 被引量:12
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作者 Sun Baitao Yan Peilei 《Earthquake Engineering and Engineering Vibration》 SCIE EI CSCD 2015年第3期571-578,共8页
The extensive damage to buildings caused by the Nepal Ms8.1 earthquake has attracted much attention by the international community.Afterthe preliminary scientific investigations on the different affected areas inNepal... The extensive damage to buildings caused by the Nepal Ms8.1 earthquake has attracted much attention by the international community.Afterthe preliminary scientific investigations on the different affected areas inNepal,the construction and damage characteristics of five different types of buildings commonly existing in Nepal were discussed and the reasons of their disaster performance were analyzed.Types of buildings investigated include reinforced concrete(RC) frame structures,rubble structures,brick-wood structures,raw soil structures,and brick-wood structures of historic buildings.In addition,the weak links of the seismic design were pointed out,which was very important for the post-earthquake reconstruction and recovery,and gave a preliminary explanations for the damage experienced. 展开更多
关键词 nepal earthquake seismic damage of building seismi
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Climate change on the southern slope of Mt. Qomolangma (Everest) Region in Nepal since 1971 被引量:6
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作者 祁威 张镱锂 +3 位作者 高俊刚 杨续超 刘林山 Narendra R.KHANAL 《Journal of Geographical Sciences》 SCIE CSCD 2013年第4期595-611,共17页
Based on monthly mean, maximum, and minimum air temperature and monthly mean precipitation data from 10 meteorological stations on the southern slope of the Mt. Qomolangma region in Nepal between 1971 and 2009, the sp... Based on monthly mean, maximum, and minimum air temperature and monthly mean precipitation data from 10 meteorological stations on the southern slope of the Mt. Qomolangma region in Nepal between 1971 and 2009, the spatial and temporal characteristics of climatic change in this region were analyzed using climatic linear trend, Sen's Slope Estimates and Mann-Kendall Test analysis methods. This paper focuses only on the southern slope and attempts to compare the results with those from the northern slope to clarify the characteristics and trends of climatic change in the Mt. Qomolangma region. The results showed that: (1) between 1971 and 2009, the annual mean temperature in the study area was 20.0℃, the rising rate of annual mean temperature was 0.25℃/10a, and the temperature increases were highly influenced by the maximum temperature in this region. On the other hand, the temperature increases on the northern slope of Mt. Qomolangma region were highly influenced by the minimum temperature. In 1974 and 1992, the temperature rose noticeably in February and September in the southern region when the increment passed 0.9℃. (2) Precipitation had an asymmetric distribution; between 1971 and 2009, the annual precipitation was 1729.01 mm. In this region, precipitation showed an increasing trend of 4.27 mm/a, but this was not statistically significant. In addition, the increase in rainfall was mainly concentrated in the period from April to October, including the entire monsoon period (from June to September) when precipitation accounts for about 78.9% of the annual total. (3) The influence of altitude on climate warming was not clear in the southern region, whereas the trend of climate warming was obvious on the northern slope of Mt. Qomolangma. The annual mean precipitation in the southern region was much higher than that of the northern slope of the Mt. Qomolangma region. This shows the barrier effect of the Himalayas as a whole and Mt. Qomolangma in particular. 展开更多
关键词 climate change Mann-Kendall analysis Mt. Qomolangma region Koshi River nepal
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^137Cs tracing dynamics of soil erosion,organic carbon,and total nitrogen in terraced fields and forestland in the Middle Mountains of Nepal 被引量:5
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作者 SU Zheng-an XIONG Dong-hong +4 位作者 DENG Wei DONG Yi-fan MA Jing PADMA C Poudel GURUNG B Sher 《Journal of Mountain Science》 SCIE CSCD 2016年第10期1829-1839,共11页
The Middle Mountains is one of the regions of Nepal most vulnerable to water erosion, where fragile geology, steep topography, anomalous climatic conditions, and intensive human activity have resulted in serious soil ... The Middle Mountains is one of the regions of Nepal most vulnerable to water erosion, where fragile geology, steep topography, anomalous climatic conditions, and intensive human activity have resulted in serious soil erosion and enhanced land degradation. Based on the 137 Cs tracing method, spatial variations in soil erosion, organic carbon, and total nitrogen(TN) in terraced fields lacking field banks and forestland were determined. Soil samples were collected at approximately 5 m and 20 m intervals along terraced field series and forestland transects respectively. Mean 137 Cs inventories of the four soil cores from the reference site was estimated at 574.33 ± 126.22 Bq m-2(1 Bq(i.e., one Becquerel) is equal to 1 disintegration per second(1 dps)). For each terrace, the 137 Cs inventory generally increased fromupper to lower slope positions, accompanied by a decrease in the soil erosion rate. Along the entire terraced toposequence, 137 Cs data showed that abrupt changes in soil erosion rates could occur between the lower part of the upper terrace and the upper part of the immediate terrace within a small distance. This result indicated that tillage erosion is also a dominant erosion type in the sloping farmland of this area. At the same time, we observed a fluctuant decrease in soil erosion rates for the whole terraced toposequence as well as a net deposition at the toe terrace. Although steep terraces(lacking banks and hedgerows) to some extent could act to limit soil sediment accumulation in catchments, soil erosion in the terraced field was determined to be serious. For forestland, with the exception of serious soil erosion that had taken place at the top of slopes due to concentrated flows from a country road situated above the forestland site, spatialvariation in soil erosion was similar to the "standard" water erosion model. Soil organic carbon(SOC) and TN inventories showed similar spatial patterns to the 137 Cs inventory for both toposequences investigated. However, due to the different dominant erosion processes between the two, we found similar patterns between the <0.002 mm soil particle size fraction(clay sized) and 137 Cs inventories in terraced fields, while different patterns could be found between 137 Cs inventories and the <0.002 mm soil particle size fraction in the forestland site. Such results confirm that 137 Cs can successfully trace soil erosion, SOC and soil nitrogen dynamics in steep terraced fields and forestland in the Middle Mountains of Nepal. 展开更多
关键词 nepal 137Cs inventory Soil erosion/deposition Soil organic carbon Total nitrogen
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Landslide susceptibility assessment of the region affected by the 25 April 2015 Gorkha earthquake of Nepal 被引量:7
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作者 Amar Deep Regmi Megh Raj Dhital +2 位作者 ZHANG Jian-qiang SU Li-jun CHEN Xiao-qing 《Journal of Mountain Science》 SCIE CSCD 2016年第11期1941-1957,共17页
Nepal was hit by a 7.8 magnitude earthquake on 25^(th) April,2015.The main shock and many large aftershocks generated a large number of coseismic landslips in central Nepal.We have developed a landslide susceptibility... Nepal was hit by a 7.8 magnitude earthquake on 25^(th) April,2015.The main shock and many large aftershocks generated a large number of coseismic landslips in central Nepal.We have developed a landslide susceptibility map of the affected region based on the coseismic landslides collected from remotely sensed data and fieldwork,using bivariate statistical model with different landslide causative factors.From the investigation,it is observed that most of the coseismic landslides are independent of previous landslides.Out of 3,716 mapped landslides,we used 80% of them to develop a susceptibility map and the remaining 20% were taken for validating the model.A total of 11 different landslide-influencing parameters were considered.These include slope gradient,slope aspect,plan curvature,elevation,relative relief,Peak Ground Acceleration(PGA),distance from epicenters of the mainshock and major aftershocks,lithology,distance of the landslide from the fault,fold,and drainage line.The success rate of 87.66% and the prediction rate of86.87% indicate that the model is in good agreement between the developed susceptibility map and theexisting landslides data.PGA,lithology,slope angle and elevation have played a major role in triggering the coseismic mass movements.This susceptibility map can be used for relocating the people in the affected regions as well as for future land development. 展开更多
关键词 EARTHQUAKE HIMALAYA Coseismic landslide SUSCEPTIBILITY bivariate statistical model nepal
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Spatiotemporal changes in agricultural land cover in Nepal over the last 100 years 被引量:4
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作者 Basanta PAUDEL 张镱锂 +1 位作者 李士成 刘林山 《Journal of Geographical Sciences》 SCIE CSCD 2018年第10期1519-1537,共19页
In order to advance land use and land cover change(LUCC) research in Nepal, it is essential to reconstruct both the spatiotemporal distribution of agricultural land cover as well as scenarios that can explain these ... In order to advance land use and land cover change(LUCC) research in Nepal, it is essential to reconstruct both the spatiotemporal distribution of agricultural land cover as well as scenarios that can explain these changes at the national and regional levels. Because of rapid population growth, the status of agricultural land in Nepal has changed markedly over the last 100 years. Historical data is used in this study, encompassing soils, populations, climatic variables, and topography. Data were revised to a series of 30 m grid cells utilized for agricultural land suitability and allocation models and were analyzed using a suite of advanced geographical tools. Our reconstructions for the spatiotemporal distribution of agricultural land in Nepal reveal an increasing trend between 1910 and 2010(from 151.2 × 10^2 km^2 to 438.8 × 10^2 km^2). This expanded rate of increase in agricultural land has varied between different eco, physiographic, and altitudinal regions of the country, significantly driven by population changes and policies over the period of this investigation. The historical dataset presented in this paper fills an existing gap in studies of agricultural land change and can be applied to other carbon cycle and climate modeling studies, as well as to impact assessments of agricultural land change in Nepal. 展开更多
关键词 agricultural land RECONSTRUCTION land suitability for cultivation altitudinal variation nepal
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An Investigation of Landslide Susceptibility Using Logistic Regression and Statistical Index Methods in Dailekh District, Nepal 被引量:5
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作者 DIL Kumar RAI XIONG Donghong +5 位作者 ZHAO Wei ZHAO Dongmei ZHANG Baojun NIRMAL Mani DAHAL WU Yanhong MUHAMMAD Aslam BAIG 《Chinese Geographical Science》 SCIE CSCD 2022年第5期834-851,共18页
Landslide distribution and susceptibility mapping are the fundamental steps for landslide-related hazard and disaster risk management activities, especially in the Himalaya region which has resulted in a great deal of... Landslide distribution and susceptibility mapping are the fundamental steps for landslide-related hazard and disaster risk management activities, especially in the Himalaya region which has resulted in a great deal of death and damage to property. To better understand the landslide condition in the Nepal Himalaya, we carried out an investigation on the landslide distribution and susceptibility using the landslide inventory data and 12 different contributing factors in the Dailekh district, Western Nepal. Based on the evaluation of the frequency distribution of the landslide, the relationship between the landslide and the various contributing factors was determined.Then, the landslide susceptibility was calculated using logistic regression and statistical index methods along with different topographic(slope, aspect, relative relief, plan curvature, altitude, topographic wetness index) and non-topographic factors(distance from river, normalized difference vegetation index(NDVI), distance from road, precipitation, land use and land cover, and geology), and 470(70%) of total 658 landslides. The receiver operating characteristic(ROC) curve analysis using 198(30%) of total landslides showed that the prediction curve rates(area under the curve, AUC) values for two methods(logistic regression and statistical index) were 0.826, and 0.823with success rates of 0.793, and 0.811, respectively. The values of R-Index for the logistic regression and statistical index methods were83.66 and 88.54, respectively, consisting of high susceptible hazard classes. In general, this research concluded that the cohesive and coherent natural interplay of topographic and non-topographic factors strongly affects landslide occurrence, distribution, and susceptibility condition in the Nepal Himalaya region. Furthermore, the reliability of these two methods is verified for landslide susceptibility mapping in Nepal’s central mountain region. 展开更多
关键词 landslide characteristics landslide susceptibility logistic regression statistical index nepal Himalaya
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Spatial and temporal variation of daytime and nighttime MODIS land surface temperature across Nepal 被引量:3
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作者 LUINTEL Nirajan MA Weiqiang +2 位作者 MA Yaoming WANG Binbin SUBBA Sunil 《Atmospheric and Oceanic Science Letters》 CSCD 2019年第5期305-312,共8页
Land surface temperature(LST)is an important variable for assessing climate change and related environmental impacts observed in recent decades.Regular monitoring of LST using satellite sensors such as MODIS has the a... Land surface temperature(LST)is an important variable for assessing climate change and related environmental impacts observed in recent decades.Regular monitoring of LST using satellite sensors such as MODIS has the advantage of global coverage,including topographically complex regions such as Nepal.In order to assess the climatic and environmental changes,daytime and nighttime LST trend analysis from 2000 to 2017 using Terra-MODIS monthly daytime and nighttime LST datasets at seasonal and annual scales over the territory of Nepal was performed.The magnitude of the trend was quantified using ordinary linear regression,while the statistical significance of the trend was identified by the Modified Mann—Kendall test.Our findings suggest that the nighttime LST in Nepal increased more prominently compared to the daytime LST,with more pronounced warming in the pre-monsoon and monsoon seasons.The annual nighttime LST increased at a rate of 0.05 K yr-1(p<0.01),while the daytime LST change was statistically insignificant.Spatial heterogeneity of the LST and LST change was observed both during the day and the night.The daytime LST remained fairly unchanged in large parts of Nepal,while a nighttime LST rise was dominant all across Nepal in the pre-monsoon and monsoon seasons.Our results on LST trends and their spatial distribution can facilitate a better understanding of regional climate changes. 展开更多
关键词 DAYTIME NIGHTTIME land surface temperature MODIS nepal climate change
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A New Species of Megophryid Frog of the Genus Scutiger from Kangchenjunga Conservation Area, Eastern Nepal 被引量:2
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作者 Janak Raj KHATIWADA Guocheng SHU +5 位作者 Tulsi Ram SUBEDI Bin WANG AnnemarieOHLER David CCANATELLA Feng XIE Jianping JIANG 《Asian Herpetological Research》 SCIE CSCD 2019年第3期139-157,共19页
This study investigated the systematics of the megophryid genus Scutiger from eastern and western Nepal using molecular and morphological data. Our results support two divergent lineages, one of which has nuptial spin... This study investigated the systematics of the megophryid genus Scutiger from eastern and western Nepal using molecular and morphological data. Our results support two divergent lineages, one of which has nuptial spines on the dorsal surface of the first three fingers while the other has spines only on the dorsal surface of the first two fingers. The Ghunsa lineage from eastern Nepal shows significant morphological and molecular differences to other species of genus Scutiger and is here described as a new species. Based on the molecular analysis, the Muktinath lineage from western Nepal is confirmed to be Scutiger boulengeri and represents a species complex widespread throughout the Himalayan region. The newly described taxon is endemic to the eastern Himalayas and currently known only from the Ghunsa valley, Taplejung district, Nepal. 展开更多
关键词 Scutiger New species EASTERN HIMALAYA nepal
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Probabilistic seismic hazard analysis in Nepal 被引量:2
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作者 Thapa Dilli Ram Wang Guoxin 《Earthquake Engineering and Engineering Vibration》 SCIE EI CSCD 2013年第4期577-586,共10页
The seismic ground motion hazard for Nepal has been estimated using a probabilistic approach. A catalogue of earthquakes has been compiled for Nepal and the surrounding region (latitude 26% N and 31.7% N and longitud... The seismic ground motion hazard for Nepal has been estimated using a probabilistic approach. A catalogue of earthquakes has been compiled for Nepal and the surrounding region (latitude 26% N and 31.7% N and longitude 79° E and 90° E) from 1255 to 2011. The distribution of catalogued earthquakes, together with available geological and tectonic information were used to delineate twenty-three seismic source seismic source information and probabilistic earthquake hazard prediction relationship, peak ground accelerations (PGAs) have zones in Nepal and the surrounding region. By using the parameters in conjunction with a selected ground motion been calculated at bedrock level with 63%, 10%, and 2% probability of exceedance in 50 years. The estimated PGA values are in the range of 0.07-0.16 g, 0.21 0.62 g, and 0.38-1.1 g for 63%, 10%, and 2% probability of exceedance in 50 years, respectively. The resulting ground motion maps show different characteristics of PGA distribution, i.e., high hazard in the far-western and eastern sections, and low hazard in southern Nepal. The quantified PGA values at bedrock level provide information for microzonation studies in different parts of the country. 展开更多
关键词 seismic hazard assessment peak ground acceleration EARTHQUAKE nepal Himalaya
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Far-field coseismic gravity changes related to the 2015 MW7.8 Nepal(Gorkha)earthquake observed by superconducting gravimeters in Chinese mainland 被引量:7
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作者 LeLin Xing ZiWei Liu +3 位作者 JianGang Jia ShuQing Wu ZhengSong Chen XiaoWei Niu 《Earth and Planetary Physics》 CSCD 2021年第2期141-148,共8页
Using data from five SGs at four stations in Chinese mainland,obvious permanent gravity changes caused by the 2015 MW7.8 Nepal(Gorkha)earthquake were detected.We analyzed the gravity effects from ground vertical defor... Using data from five SGs at four stations in Chinese mainland,obvious permanent gravity changes caused by the 2015 MW7.8 Nepal(Gorkha)earthquake were detected.We analyzed the gravity effects from ground vertical deformation(VD)using co-site continuous GPS(cGPS)data collocated at the Lijiang and the Wuhan station,and hydrological effects using GLDAS models and groundwater level records.After removing these effects,SG observations before and after the earthquake revealed obvious permanent gravity changes:−3.0μGal,7.3μGal and 8.0μGal at Lhasa,Lijiang and Wuhan station,respectively.We found that the gravity changes cannot be explained by the results of dislocation theory. 展开更多
关键词 the 2015 nepal earthquake superconducting gravimeter coseismic gravity change
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Underutilized Plant Species in Far West Nepal 被引量:3
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作者 Ripu M.KUNWAR Laxmi MAHAT +3 位作者 Lila N.SHARMA Keshab P.SHRESTHA Hiroo KOMINEE Rainer W.BUSSMANN 《Journal of Mountain Science》 SCIE CSCD 2012年第5期589-600,共12页
Underutilized plant species help to alleviate common food insufficiencies by providing alternative food supply. They also complement primary health care, furnishing raw materials where the cultivation of staple cereal... Underutilized plant species help to alleviate common food insufficiencies by providing alternative food supply. They also complement primary health care, furnishing raw materials where the cultivation of staple cereal crops is least feasible and health care is pursued indigenously. Research and promotion of extraction, utilization, and conservation of underutilized species lead to exploration of new staple crops and motivate people to consume in a sustainable manner. The present study describes the current status, uses, and management of underutilized plant species in Far West Nepal. The relative importance of 49 underutilized plant species was computed employing a Relative Importance (RI) technique. The use-values assigned to the species fall into six use-categories: beverage, fodder, food & edible, medicinal, vegetable and veterinary. A total of 22 species appeared in multiple use-categories, while the rest were characterized by a single use-category. Based on relative importance and frequency, Ficus semicordata, Debregesia longifolia, Girardinea diversifolia, Hydrocotyle nepalensis, Garuga pinnata, Aloe vera and Pyrus pashia offer the most potential for future. Underutilized plants proved important to folk medicine and food. These species persist because they remain useful to local people as means of subsistence, production, and primary health care. The findings are important so far as they point up the role of underutilized plants in national food security policy and health care, spelling out their potentialities and cross cutting relationships. 展开更多
关键词 Underutilized plants Relativeimportance (R/) Ethnoveterinary use CONSERVATION nepal
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Improvement of Glacial Lakes Detection under Shadow Environment Using ASTER Data in Himalayas, Nepal 被引量:2
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作者 CHEN Wenbo FUKUI Hiromichi +1 位作者 DOKO Tomoko GU Xingfa 《Chinese Geographical Science》 SCIE CSCD 2013年第2期216-226,共11页
The detection of glacial lake change in the Himalayas, Nepal is extremely significant since the glacial lake change is one of the crucial indicators of global climate change in this area, where is the most sensitive a... The detection of glacial lake change in the Himalayas, Nepal is extremely significant since the glacial lake change is one of the crucial indicators of global climate change in this area, where is the most sensitive area of the global climate changes. In the Hima- layas, some of glacial lakes are covered by the dark mountains' shadow because of their location. Therefore, these lakes can not be de- tected by conventional method such as Normalized Difference Water Index (NDWI), because the reflectance feature of shadowed glacial lake is different comparing to the ones which are located in the open flat area. The shadow causes two major problems: 1) glacial lakes which are covered by shadow completely result in underestimation of the number of glacial lakes; 2) glacial lakes which are partly iden- tified are considered to undervalue the area of glacial lakes. The aim of this study is to develop a new model, named Detection of Shadowed Glacial Lakes (DSGL) model, to identify glacial lakes under the shadow environment by using Advanced Space-borne Ther- mal Emission and Reflection Radiometer (ASTER) data in the Himalayas, Nepal. The DSGL model is based on integration of two dif- ferent modifications of NDWI, namely NDWls model and NDWIshe model. NDWI~ is defined as integration of the NDWI and slope analysis and used for detecting non-shadowed lake in the mountain area. The NDWIshe is proposed as a new methodology to overcome the weakness of NDWI~ on identifying shadowed lakes in highly elevated mountainous area such as the Himalayas. The first step of the NDWIshe is to enhance the data from ASTER 1B using the histogram equalization (HE) method, and its outcome product is named AS- TERho. We used the ASTERhe for calculating the NDWIhc and the NDWIshe. Integrated with terrain analysis using Digital Elevation Model (DEM) data, the NDWIshe can be used to identify the shadowed glacial lakes in the Himalayas. NDWIs value of 0.41 is used to identify the glacier lake (NDWI~ 〉 0.41), and 0.3 of NDWIshe is used to identify the shadowed glacier lake (NDWIsho 〈 0.3). The DSGL model was proved to be able to classify the glacial lakes more accurately, while the NDWI model had tendency to underestimate the presence of actual glacial lakes. Correct classification rate regarding the products from NDWI model and DSGL model were 57% and 99%, respectively. The results of this paper demonstrated that the DSGL model is promising to detect glacial lakes in the shadowed en- vironment at high mountains. 展开更多
关键词 glacial lake shadow environment DSGL model ASTER remote sensing HIMALAYAS nepal
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Multiplicity of solutions to geophysical inversion reflected by rupture slip distribution of the 2015 Nepal earthquake 被引量:2
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作者 Kai Tan Caihong Zhang +5 位作者 Bin Zhao Qi Wang Ruilin Du Rui Zhang Xuejun Qiao Yong Huang 《Geodesy and Geodynamics》 2017年第1期59-69,共11页
The equivalence of geophysical fields, the finiteness of measurements and the measurement errors make the result of geophysical inversion non-unique. For example, the measurements and inversion method used, the priori... The equivalence of geophysical fields, the finiteness of measurements and the measurement errors make the result of geophysical inversion non-unique. For example, the measurements and inversion method used, the priori rupture model determined and the slip distribution smoothing factor selected will have significant influences on the earthquake rupture slip distribution. Using different data and methods, different authors have given different rupture slip distribution models of the 2015 Mw7.9 Nepal earth- quake, with the maximum slip ranging from 3.0 m to 6.8 m. In this paper, geometry parameters of the single rectangular fault model in elastic half-space were inferred constraining with the Global Posi- tioning System (GPS) and Interferometric Synthetic Aperture Radar (InSAR) coseismic deformations and bounding the slip with approximate average value; and then, the single rectangular fault was divided into multiple sub-faults, and the final slip smoothing factor, the final slip distribution and the maximum slip were determined with the misfit-roughness tradeoff curve, the cross-validation sum of squares (CVSS) and the third-party observation data or indexes being comprehensively taken into account. The results show that, the rupture of the Nepal earthquake extended by over 100 km east by south. The maximum slip of the earthquake was about 6.5-6.7 m, and most of the slip is confined at depths of 8 -20 kin, consistent with the depth distribution of aftershocks. The method for reducing the multiplicity of solutions to rupture slip distribution in this paper was ever used in inversion of rupture slip distri- bution for the 2008 Wenchuan and 2013 Lushan earthquakes, and the third-party measurement - surface dislocation has very large effect on reducing the multiplicity of solutions to inversion of the Wenchuan earthquake. Other priori information or indicators, such as fault strike, dip, earthquake magnitude, seismic activity, Coulomb stress, and seismic period, can be used for beneficial validation of and comparison with inversion results. 展开更多
关键词 Multiplicity of inversion solutions nepal earthquake Coseismic deformation Rupture slip distribution
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Undergraduate nursing students' knowledge of aging, attitudes toward and perceptions of working with older adults in Kathmandu Nepal 被引量:2
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作者 Saruna Ghimire Nitisha Shrestha +4 位作者 Karen E.Callahan Dhirendra Nath Binaya Kumar Baral Nirmala Lekhak Devendra Raj Singh 《International Journal of Nursing Sciences》 CSCD 2019年第2期204-210,共7页
Objectives: This study aims to examine Nepalese undergraduate nursing students' knowledge of aging,attitudes towards older adults and perceptions of working with older adults,and to assess differences in these out... Objectives: This study aims to examine Nepalese undergraduate nursing students' knowledge of aging,attitudes towards older adults and perceptions of working with older adults,and to assess differences in these outcomes by socio-demographic characteristics as well as type of nursing program.Methods: A cross-sectional study was conducted among 385 undergraduate nursing students in six nursing colleges located in the Kathmandu Valley,Knowledge of aging,attitudes toward older adults and perceptions of working with older adults were assessed using standardized tools,the Palmore Facts on Aging Quiz,Kogan's Attitudes towards Older People Scale,and Nolan's Intent to Work with Older People Questionnaire,respectively.Results: The mean knowledge scores on older adults and aging were relatively low;participants scored an average of 26.9 out of 50.Scores assessing attitudes towards and perceptions of working with older adults were more favorable.Compared to students pursuing a Bachelor of Science in Nursing (BSN),students pursuing a Bachelor of Nursing (BN) had a significantly higher score on the knowledge,attitudes and perception of aging scales.Linear regression analyses showed that the students' knowledge of aging (β =0.55;95% CI =0.25-0.86) and perceptions of working with older adults (β =0.22;95% Cl =0.05 -0.38) had a significant positive association with their attitudes toward older adults.Conclusions: Undergraduate nursing students in the Kathmandu Valley of Nepal displayed a relatively low level of knowledge,but a positive attitude towards older adults,and a positive perception of working with older adults.Observed differences in knowledge,attitude,and perception scores between students in BSN and BN programs needs further investigation;closing this gap may be important for bolstering undergraduate gerontological preparation in Nepal. 展开更多
关键词 Aged ATTITUDES Knowledge PERCEPTIONS STUDENTS NURSING nepal
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