Based on comprehensive observations of 20 wire icing events during winter from 2019 to 2021,we investigated the characteristics of the icing properties,the atmospheric boundary layer structure,the raindrop size distri...Based on comprehensive observations of 20 wire icing events during winter from 2019 to 2021,we investigated the characteristics of the icing properties,the atmospheric boundary layer structure,the raindrop size distribution,and their associated effects on the ice accretion mechanism in the mountainous region of Southwest China.The maximum ice weight was positively correlated with the duration of ice accretion in the mountainous area.The duration of precipitation accounted for less than 20%of the icing period in the mountainous area,with solid-phase hydrometeors being predominant.Icing events,dominated by freezing rain(FR)and mixed rain–graupel(more than 70%),were characterized by glaze or highdensity mixed icing.The relationship between the melting energy and refreezing energy reflected the distribution characteristics of the proportion of FR under mixed-phase precipitation.The intensity of the warm layer and the dominant precipitation phase significantly affected the variations in the microphysical properties of FR.The melting of large dry snowflakes significantly contributed to FR in the mountainous areas,resulting in smaller generalized intercepts and larger mass-weighted mean diameters in the presence of a stronger warm layer.Under a weaker warm layer,the value of the massweighted mean diameter was significantly smaller because of the inability of large solid particles to melt.Finally,FR in the mountainous area dominated the ice weight during the rapid ice accumulation period.A numerical simulation of FR icing on wires effectively revealed the evolution of disaster-causing icing in mountainous areas.展开更多
Seyitgazi and Han districts,located in the south of Eskişehir in Central Anatolia,in western Türkiye,host interesting landforms,such as steep slopes,mesas and butte structures,fault-guided slopes,valleys,fairy ch...Seyitgazi and Han districts,located in the south of Eskişehir in Central Anatolia,in western Türkiye,host interesting landforms,such as steep slopes,mesas and butte structures,fault-guided slopes,valleys,fairy chimneys,castle koppies,pillars,weathered rock blocks,perched rocks,cavernous weathering features,grooves,and gnammas,formed on tuffs in semi-arid to semi-humid climatic conditions,as well as geoarchaeological remains belonging to various civilisations,primarily the Phrygians(including rock-cut tombs and settlements,fortresses,rock churches,façades,altars,and niches).This study aims at identifying these remarkable landforms that host cultural heritage and revealing the geoheritage value and geotourism potential of the region.The data obtained from the fieldwork were evaluated using the methodology proposed by Pereira and Pereira in 2010,and 26 geomorphosites were selected from 61 potential sites using this method.The analysis results revealed that although the region hosts numerous geomorphosites with high scientific,cultural,aesthetic,and ecological value,the overall levels of protection and touristic use of these landforms are generally low.Indeed,the area,which has the potential to be an important tourism region in the future,faces problems such as infrastructure deficiencies,transportation difficulties,lack of promotion,weaknesses in accommodation services,and destruction of geoheritage.These results highlight the importance of implementing sustainable geotourism strategies that are compatible with the region’s unique geoheritage.In this respect,this study is among the first to comprehensively inventory and assess the geomorphosites of Mountainous Phrygia,contributing to regional geoconservation and sustainable tourism development.展开更多
Cropland abandonment has been a widespread phenomenon in mountainous areas due to the increasing number of natural disasters and the massive migration of rural labor in the process of rapid urbanization.Land transfer ...Cropland abandonment has been a widespread phenomenon in mountainous areas due to the increasing number of natural disasters and the massive migration of rural labor in the process of rapid urbanization.Land transfer is a crucial prerequisite for ensuring food security and fostering rural revitalization.How to promote land transfer in mountainous areas remains a challenging but important task.Nevertheless,there is a dearth of research examining land transfers among farm households that specifically address mountainous regions,and the influence of grassroots governance and geographic location has not been thoroughly elucidated within this particular context.Based on 895household samples collected in Dabie Mountainous Area in China,this study employs binary and ordinal logistic regression models to provide a more comprehensive analysis on land transfers among rural households and the determinants,including the decision to transfer land,the existence of land transfer rents,the channel of land transfer,the duration of the transfer,the pre-transfer cultivation situation,and the level of satisfaction with the land transfer rent.The findings reveal that grassroots governance,geographic location,livelihood capital,and demographic factors significantly influence land transfers among rural households.Specifically,villagers'public participation positively affects land transfer participation(β=0.235,p<0.05),while the operation of village rules and regulations negatively impacts it(β=-0.296,p<0.05).Village cadre satisfaction positively influences both land transfer rent(β=0.274,p<0.05)and rent satisfaction(β=0.303,p<0.05).Improved civil relations in the village correlate with lower land transfer rent(β=-0.511,p<0.05),while a better social atmosphere is associated with higher satisfaction with transfer rent(β=0.575,p<0.01).Households at higher elevations tend to prefer government-mediated land transfers with longer durations.The distances to the township and county centers have contrasting effects on land transfer rent,but their impacts on participation in land transfer,choice of transfer channel,and duration are consistent.The study also found that different types of livelihood capital,as well as the demographic characteristics of households,significantly affect various aspects of land transfer.These empirical findings can inform policymaking to promote more efficient land transfers in mountainous region.展开更多
To ensure the operational safety of railways in the landslide-prone areas of mountainous regions,a large-scale model test and numerical simulation were conducted to study the bending moment distribution,internal force...To ensure the operational safety of railways in the landslide-prone areas of mountainous regions,a large-scale model test and numerical simulation were conducted to study the bending moment distribution,internal force distribution,deformation development,and crack propagation characteristics of a framed anti-sliding structure(FAS)under landslide thrust up to the point of failure.Results show that the maximum bending moment and its increase rate in the fore pile are greater than those in the rear pile,with the maximum bending moment of the fore pile approximately 1.1 times that of the rear pile.When the FAS fails,the displacement at the top of the fore pile is significantly greater,about 1.27 times that of the rear pile in the experiment.Major cracks develop at locations corresponding to the peak bending moments.Small transverse cracks initially appear on the upper surface at the intersection between the primary beam and rear pile and then spread to the side of the structure.At the failure stage,major cracks are observed at the pil-beam intersections and near the anchor points.Strengthening flexural stiffness at intersections where major cracks occur can improve the overall thrust-deformation coordination of the FAS,thereby maximizing its performance.展开更多
Free-space quantum key distribution(QKD)offers broader geographical coverage and more flexible system deployment than fiber-based systems.However,the free-space environment is highly complex,and various attenuation fa...Free-space quantum key distribution(QKD)offers broader geographical coverage and more flexible system deployment than fiber-based systems.However,the free-space environment is highly complex,and various attenuation factors can significantly reduce the key distribution efficiency or even lead to encoding failures.This paper discusses and analyzes the impact of turbulence and fog in mountainous environments on free-space discrete-variable quantum key distribution.Through numerical simulation,this study examines the effects of altitude and visibility on transmittance and turbulence intensity,finding that turbulence intensity decreases with increasing altitude while transmittance increases;improvements in visibility also lead to increased transmittance.Beam wandering due to turbulence is also dominant.Combining these factors,the effects on the total transmittance and the secret key rate are taken into consideration.Our work could provide a reference for the deployment of practical QKD systems in actual mountainous environments.展开更多
The study offers a conceptual framework illuminating sustainable rural development by a continuous cycling interplay among five interdependent systems,physical,social,economic,knowledge,and creative.The framework is a...The study offers a conceptual framework illuminating sustainable rural development by a continuous cycling interplay among five interdependent systems,physical,social,economic,knowledge,and creative.The framework is applied to analyze the livelihood transition in the economic system and conversion of traditional knowledge in the creative system for farm households engaged in large cardamom cultivation in Northern mountainous region in Vietnam.This study used a probit model to examine a data set comprising 300 households and confirmed that factors within the social and physical systems(such as labor,access to information,social networks,land use,and transportation infrastructure)determined livelihood transition to tourism employment within the economic system.In addition,the conversion of traditional knowledge in the creative system was found to be contingent upon non-farm employment and credit capital in the economic system,as well as traditional knowledge and knowledge exchange in the knowledge system.This study demonstrates how the sustainable development of rural agriculture can be achieved by converting traditional knowledge and transferring livelihood,contributing to attain Sustainable Development Goals 2(Zero Hunger)and SDG 12(Responsible Consumption and Production).展开更多
This paper first analyzes the fundamental characteristics and the advantages and disadvantages in the development and utilization of land resources in China s mountainous areas. It then explores the five major strateg...This paper first analyzes the fundamental characteristics and the advantages and disadvantages in the development and utilization of land resources in China s mountainous areas. It then explores the five major strategic tasks facing the sustainable development and utilization of mountainous land resources in China. From the perspective of human-land coordination and sustainable development, the paper proposes countermeasures and recommendations for the sustainable development and utilization of land resources in China s mountainous areas.展开更多
Focusing on comprehensive land consolidation in mountainous areas, this paper explores the connotation of comprehensive land consolidation and its internal logic for promoting rural revitalization. Furthermore, it elu...Focusing on comprehensive land consolidation in mountainous areas, this paper explores the connotation of comprehensive land consolidation and its internal logic for promoting rural revitalization. Furthermore, it elucidates the effectiveness and experience of mountainous area comprehensive land consolidation in the rural revitalization process by using practical cases. The aim is to provide theoretical reference and practical guidance for leveraging the role of comprehensive land consolidation in mountainous areas for rural revitalization, thereby promoting the sustainable utilization of land resources and the coordinated development of the economy and society in mountainous regions.展开更多
In 2011, Yunnan provincial committee and government proposed the strat- egy of constructing mountainous cities in order to protect farmlands and guarantee crop safety, which makes full use of hills and gentle-slopes a...In 2011, Yunnan provincial committee and government proposed the strat- egy of constructing mountainous cities in order to protect farmlands and guarantee crop safety, which makes full use of hills and gentle-slopes and transforms land use pattern. However, social and economic development performs unevenly in Yun- nan, supplemented by varied geographical conditions, so that constructing mountain- ous cities should proceed as per local conditions. The research proposed the con- trol of constructing mountainous cities provided crop safety under the principle of farmland protection and measured the quantities of demanded construction lands ac- cording to science of population prediction and ekistics, based on which the control scales of constructing mountainous cities were determined by multiplying basic farm- land coefficient and the area of newly increased construction lands. The research is of significance for guiding the construction of mountainous cities and avoiding the occupation of construction lands on farmlands.展开更多
The mountainous rural regions of China are undergoing enormous changes in space and time.To a certain extent,this change has increased the difficulties in our understanding of rural development in mountainous areas an...The mountainous rural regions of China are undergoing enormous changes in space and time.To a certain extent,this change has increased the difficulties in our understanding of rural development in mountainous areas and brought challenges to development policies and revitalization strategies in mountainous rural regions,especially in karst mountainous areas.In light of the difficulty in and as the key to the development of China's mountainous rural areas,the scientific and systematic construction of indicators for evaluating the level of rural revitalization development and clarifying the level of rural revitalization development and influential factors in karst mountainous areas are of great significance to the implementation of the development of the strategy for the revitalization of the rural areas in karst mountainous areas in China.This study constructed an evaluation index system of the rural regional system and rural revitalization development(RTSRD)from the perspective of rural regional system theory,assessed the spatial differentiation patterns and influential factors of RTSRD,and refined a typical territorial model of rural revitalization development in karst mountainous areas by taking Guizhou Province,a typical karst mountainous region,as a case study area.The evaluation and spatial analyses show that the RTSRD indices of karst mountainous areas in the system perspective show a linear growth trend in all single dimensions,with industrial revitalization(IR)showing the most significant increase each year.In time,the RTSRD of karst mountainous regions has developed from low to high,with evident improvement;spatially,the RTSRD shows the characteristics of‘high in the middle and low in the surroundings,and low in the plateau and low in the depression,'with apparent spatial heterogeneity.In addition,this study found that the spatial and temporal differences in RTSRD result from a combination of endogenous push and exogenous pull in the rural system.In particular,this study has refined a typical regional model of rural revitalization development in karst mountainous regions,which provides theoretical support and case practice for rural development in other karst mountainous regions.At the same time,it provides a basis for decision-making for the county level government and rural development planning.展开更多
According to the particularity of towns＇ construction in the southwestern mountainous areas of Yunnan Province, this study has built constructive land suit- ability evaluation index system which is different to flat ...According to the particularity of towns＇ construction in the southwestern mountainous areas of Yunnan Province, this study has built constructive land suit- ability evaluation index system which is different to flat area. Then this study deter- mined single evaluation factors index and comprehensive suitability index using ＂ex- treme conditions method＂ and ＂suitability index method＂, and analyzed and assessed the constructive land suitability on each evaluation unit polygons and its suitability level by using GIS software. Taking Lianghe County of Dehong Dai-Jingpo Au- tonomous Prefecture as an example to evaluate land suitability in Lianghe County＇s main towns around the gentle slope, the results show, in the evaluation area, the area of land suitable for construction and unsuitable for construction respectively ac- count 73.58% and 26.42%. And first-class, second and third-class of land suitable for construction should be composited at the ratio of about 11：49：40. The suitability evaluation index system and method developed in this paper is applicable for evalu- ating the construction land suitability in mountainous areas of southwest Yunnan Province, and will provide theoretical and technical support for land policy measures which strengthen the protection of farmland and promote the scientific development of urbanization in Yunnan Province and even similar mountainous areas of the whole China.展开更多
[Objective] The aim was to investigate ecological carrying capacity of Fangshan District in Beijing. [Method] Ecological footprint and carrying capacity of Fangshan District in 2007 and 2008 were analyzed with ecologi...[Objective] The aim was to investigate ecological carrying capacity of Fangshan District in Beijing. [Method] Ecological footprint and carrying capacity of Fangshan District in 2007 and 2008 were analyzed with ecological footprint model and the difference between ecological footprint and carrying capacity there was con- cluded. Furthermore, an assessment was made on relation between Fangshan de- velopment with local ecological carrying capacity to evaluate sustainable development of Fangshan District. [Result] Fangshan District is of lightly ecological deficit; ecologi- cal footprint per capita in 2007-2008 was deficit and tended to expand. Two meth- ods are available to reduce ecological ：deficit, including reduction of ecological foot- print and increase of carrying capacity. In general, supply and demand of carrying capacity in Fangshan are better, though with some problems. It is necessary to fur- ther develop related industries to final eliminate ecological deficit in order to achieve ecological conservation-orientation and sustainable development of Fangshan District. [Conclusion] The research provides theoretical references for overall evaluation on eco- logical carrying capacity of Fangshan District.展开更多
After illustration of research and development process of sightseeing agricultural park,the paper had classified sightseeing agricultural park into sightseeing agricultural park,education agricultural park and agricul...After illustration of research and development process of sightseeing agricultural park,the paper had classified sightseeing agricultural park into sightseeing agricultural park,education agricultural park and agricultural garden in terms of development content;into renovation type and newly-built type in accordance with development mode;and into plain type and mountainous type in the light of terrain.From the perspectives of terrain,vegetation,hydrology and ecology,characteristics of landscape resources in mountainous sightseeing agricultural park were analyzed.It proposed principles for planning and design of mountainous sightseeing agricultural park,which were respecting and protecting nature,linking landscape units and coordinating spatial structure,systematicness and protecting inheritance of traditional culture.On this basis,it had illustrated landscape designing theories on architecture and landscape furniture,traffic road,plant greening and water supply and sewerage works.展开更多
To reduce poverty and promote sustainable development in rural areas,it is crucial to explore the impact of labor mobility on the sustainable livelihoods in mountainous regions.Here,based on a questionnaire survey of ...To reduce poverty and promote sustainable development in rural areas,it is crucial to explore the impact of labor mobility on the sustainable livelihoods in mountainous regions.Here,based on a questionnaire survey of farmers and in-depth interview data in the area of the Qinling-Daba Mountains of China in 2021,we analyzed the characteristics of labor mobility,with livelihood capital as the entry point,discussed the impact of labor mobility on farmers’sustainable livelihood using propensity score matching(PSM).The res-ults showed that labor mobility was common in the Qinling-Daba Mountains area,with some form of labor mobility in 61.97%of households.The majority of households had only male mobility,and labor mobility tended to be small in scale,low in frequency,yet permanent and over long distances.Labor mobility had a significantly positive impact on farmers in mountainous regions,increasing the livelihood sustainability of rural households by 7.83%.However,the impact of labor mobility on different livelihood capital was differ-ent,which had the greatest improvement on financial capital,followed by social capital,although it weakened natural capital to some extent.Except for high-frequency mobility,the comprehensive impact of other types of labor mobility was positive.Among them,medi-um-scale mobility,seasonal mobility,inter-provincial mobility,and low-frequency mobility had more pronounced positive effects on farmers’sustainable livelihoods.Our study provided a reference to guide policy on rural migration,with the aim of providing support for the sustainable development of mountainous villages.展开更多
Valley economy is a new mode in mountainous area development that is defined by various characters of valley development, and is a distinguishing economical geographic pattern for mountainous area development. The spe...Valley economy is a new mode in mountainous area development that is defined by various characters of valley development, and is a distinguishing economical geographic pattern for mountainous area development. The special spatial coupling relations in the distribution of different mountainous elements in valleys are new subjects for the mountain development studies, and such studies are meaningful both for researches and practices. Based on the long term researches on mountainous area development and following a brief exploration into the connotations and the spatial organizing process of valley economy, the authors analyzed the present situations of the development of valley economy in Beijing＇s mountainous areas, studied the characteristics and the impacts of the spatial structural changes of the valley economy in Beijing＇s mountainous areas, and finally proposed a rational arrangement of the spatial structure of the valley economy in Beijing＇s mountainous areas. It is considered in this study that valley economy plays an important role in the development and functional transformation in Beijing＇s mountainous areas in the new epoch. Firstly, valley economy is not outlined by the administrative boundaries, and it connects most of the villages in the mountainous areas roughly along the major transportation lines. Therefore, valley economy can exert positive influence on the development in the mountainous areas, at least in the aspects such as the rearrangement of industrial structure in the mountainous areas and the coordinated development of rural and urban areas. In addition, it is found that the valley economy in Beijing＇s mountainous areas is evolved in a spatial organizing stage of secondary concentration, which is characterized by resource-saving, ecological protection and industrial optimization. Therefore, the development of valley economy will be helpful to the coordination between ecological protection and economic development in the mountainous areas, and will promote the integrated development of the mountainous areas. The developing mode of the valley economy in Beijing＇s mountainous areas will provide the basis for the decision-making in the transformation of the functional roles of Beijing＇s mountainous areas, and on the other hand, will present experiences for the studies in the mountainous areas outside of Beijing.展开更多
Based on introducing wild plant resources of vertical greening in Qin-ba Mountainous area, the application of vertical greening plants of Qin-ba Mountainous area in garden greening were analyzed, the measures of utili...Based on introducing wild plant resources of vertical greening in Qin-ba Mountainous area, the application of vertical greening plants of Qin-ba Mountainous area in garden greening were analyzed, the measures of utilization and development were suggested.展开更多
The economic and social development status and the formation mechanism of "poverty trap" in Wumeng mountainous area were analyzed, the feasibility of developing eco-tourism to ecological restoration and rura...The economic and social development status and the formation mechanism of "poverty trap" in Wumeng mountainous area were analyzed, the feasibility of developing eco-tourism to ecological restoration and rural poverty reduction was discussed, and some corresponding countermeasures were put forward.展开更多
With the urban green space system planning of small cities in mountainous areas as the study object,the planning practices are analyzed and studied to summarize the common characteristics of urban green space system p...With the urban green space system planning of small cities in mountainous areas as the study object,the planning practices are analyzed and studied to summarize the common characteristics of urban green space system planning in those small cities.Being combined with relevant national standards and regulations,the problems that those small cities are faced with in their urban green space system planning are analyzed,then corresponding countermeasures and suggestions are put forward to resolve problems in the practical planning.展开更多
By studying the planning of Aoshan Park in Jianyang City,a typical eco-park in mountainous regions,the authors analyzed its topography and vegetations,specifically,vegetation types and plant species,and pointed out pr...By studying the planning of Aoshan Park in Jianyang City,a typical eco-park in mountainous regions,the authors analyzed its topography and vegetations,specifically,vegetation types and plant species,and pointed out problems of its present vegetations based on the evaluation.By maintaining existing indigenous plant species,plant planning and ecological corridor design was carried out to rebuild the eco-forest belt of Mt.Aoshan and optimize landscapes in Aoshan Park.Plant landscaping of Aoshan Park,by following the principles of "ecological" and "right trees for right land",has 3 different styles:natural,regular and mixed.Regular style is mainly located in the cultural experience area by applying regular planting types,such as coupled planting and mass planting;natural style runs through the park from north to south,and takes seasonal changes of landscapes as the theme to show the attraction of nature;mixed style is mainly applied in the recreational vacation area,connecting all independent scenic spots by water.The design of ecological corridor should follow the principle of "integrated,protective and diversified",attach more importance to the construction of mountain corridor system,ecological road and river corridors.Several species were recommended for vegetation recovery and slope greening in the study area.And corresponding suggestions were given for the planning and design of eco-park in mountainous regions.展开更多
Damp-heat karst mountainous areas are unique areas in terms of socialeconomic development, resource endowment and eco-environment in China, where natural resources are abundant,unique and diverse. However, fragile eco...Damp-heat karst mountainous areas are unique areas in terms of socialeconomic development, resource endowment and eco-environment in China, where natural resources are abundant,unique and diverse. However, fragile eco-environment, undeveloped economy and culture, and conflict of human and environment should not be ignored. In the research, a framework of integration of resource-development and environment-protection in damp-heat karst was designed on basis of resource and environment integration, which was applied to Daxin County in Guangxi Province. Furthermore, some integration models were proposed, including integration of development of characteristic agricultural resources and protection of eco-environment, integration of development of manganese ore resources and protection of eco-environment, integration of development of tourism resources and protection of ecoenvironment and integration of development of clean energy and protection of eco-environment.展开更多
基金funded by the National Natural Science Foundation of China(Grant No.42325503)the Hubei Provincial Natural Science Foundation and the Meteorological Innovation and Development Project of China(Grant Nos.2023AFD096 and 2022CFD122)+1 种基金the Natural Science Foundation of Wuhan(Grant No.2024020901030454)the Beijige Foundation of NJIAS(Grant No.BJG202304)。
文摘Based on comprehensive observations of 20 wire icing events during winter from 2019 to 2021,we investigated the characteristics of the icing properties,the atmospheric boundary layer structure,the raindrop size distribution,and their associated effects on the ice accretion mechanism in the mountainous region of Southwest China.The maximum ice weight was positively correlated with the duration of ice accretion in the mountainous area.The duration of precipitation accounted for less than 20%of the icing period in the mountainous area,with solid-phase hydrometeors being predominant.Icing events,dominated by freezing rain(FR)and mixed rain–graupel(more than 70%),were characterized by glaze or highdensity mixed icing.The relationship between the melting energy and refreezing energy reflected the distribution characteristics of the proportion of FR under mixed-phase precipitation.The intensity of the warm layer and the dominant precipitation phase significantly affected the variations in the microphysical properties of FR.The melting of large dry snowflakes significantly contributed to FR in the mountainous areas,resulting in smaller generalized intercepts and larger mass-weighted mean diameters in the presence of a stronger warm layer.Under a weaker warm layer,the value of the massweighted mean diameter was significantly smaller because of the inability of large solid particles to melt.Finally,FR in the mountainous area dominated the ice weight during the rapid ice accumulation period.A numerical simulation of FR icing on wires effectively revealed the evolution of disaster-causing icing in mountainous areas.
文摘Seyitgazi and Han districts,located in the south of Eskişehir in Central Anatolia,in western Türkiye,host interesting landforms,such as steep slopes,mesas and butte structures,fault-guided slopes,valleys,fairy chimneys,castle koppies,pillars,weathered rock blocks,perched rocks,cavernous weathering features,grooves,and gnammas,formed on tuffs in semi-arid to semi-humid climatic conditions,as well as geoarchaeological remains belonging to various civilisations,primarily the Phrygians(including rock-cut tombs and settlements,fortresses,rock churches,façades,altars,and niches).This study aims at identifying these remarkable landforms that host cultural heritage and revealing the geoheritage value and geotourism potential of the region.The data obtained from the fieldwork were evaluated using the methodology proposed by Pereira and Pereira in 2010,and 26 geomorphosites were selected from 61 potential sites using this method.The analysis results revealed that although the region hosts numerous geomorphosites with high scientific,cultural,aesthetic,and ecological value,the overall levels of protection and touristic use of these landforms are generally low.Indeed,the area,which has the potential to be an important tourism region in the future,faces problems such as infrastructure deficiencies,transportation difficulties,lack of promotion,weaknesses in accommodation services,and destruction of geoheritage.These results highlight the importance of implementing sustainable geotourism strategies that are compatible with the region’s unique geoheritage.In this respect,this study is among the first to comprehensively inventory and assess the geomorphosites of Mountainous Phrygia,contributing to regional geoconservation and sustainable tourism development.
基金supported by the National Natural Science Foundation of China(Grant Nos.42371315,41901213)the Humanities and Social Sciences General Research Program of the Ministry of Education(Grant No.23YJC790141)。
文摘Cropland abandonment has been a widespread phenomenon in mountainous areas due to the increasing number of natural disasters and the massive migration of rural labor in the process of rapid urbanization.Land transfer is a crucial prerequisite for ensuring food security and fostering rural revitalization.How to promote land transfer in mountainous areas remains a challenging but important task.Nevertheless,there is a dearth of research examining land transfers among farm households that specifically address mountainous regions,and the influence of grassroots governance and geographic location has not been thoroughly elucidated within this particular context.Based on 895household samples collected in Dabie Mountainous Area in China,this study employs binary and ordinal logistic regression models to provide a more comprehensive analysis on land transfers among rural households and the determinants,including the decision to transfer land,the existence of land transfer rents,the channel of land transfer,the duration of the transfer,the pre-transfer cultivation situation,and the level of satisfaction with the land transfer rent.The findings reveal that grassroots governance,geographic location,livelihood capital,and demographic factors significantly influence land transfers among rural households.Specifically,villagers'public participation positively affects land transfer participation(β=0.235,p<0.05),while the operation of village rules and regulations negatively impacts it(β=-0.296,p<0.05).Village cadre satisfaction positively influences both land transfer rent(β=0.274,p<0.05)and rent satisfaction(β=0.303,p<0.05).Improved civil relations in the village correlate with lower land transfer rent(β=-0.511,p<0.05),while a better social atmosphere is associated with higher satisfaction with transfer rent(β=0.575,p<0.01).Households at higher elevations tend to prefer government-mediated land transfers with longer durations.The distances to the township and county centers have contrasting effects on land transfer rent,but their impacts on participation in land transfer,choice of transfer channel,and duration are consistent.The study also found that different types of livelihood capital,as well as the demographic characteristics of households,significantly affect various aspects of land transfer.These empirical findings can inform policymaking to promote more efficient land transfers in mountainous region.
基金The National Natural Science Foundation of China(No.52078427).
文摘To ensure the operational safety of railways in the landslide-prone areas of mountainous regions,a large-scale model test and numerical simulation were conducted to study the bending moment distribution,internal force distribution,deformation development,and crack propagation characteristics of a framed anti-sliding structure(FAS)under landslide thrust up to the point of failure.Results show that the maximum bending moment and its increase rate in the fore pile are greater than those in the rear pile,with the maximum bending moment of the fore pile approximately 1.1 times that of the rear pile.When the FAS fails,the displacement at the top of the fore pile is significantly greater,about 1.27 times that of the rear pile in the experiment.Major cracks develop at locations corresponding to the peak bending moments.Small transverse cracks initially appear on the upper surface at the intersection between the primary beam and rear pile and then spread to the side of the structure.At the failure stage,major cracks are observed at the pil-beam intersections and near the anchor points.Strengthening flexural stiffness at intersections where major cracks occur can improve the overall thrust-deformation coordination of the FAS,thereby maximizing its performance.
文摘Free-space quantum key distribution(QKD)offers broader geographical coverage and more flexible system deployment than fiber-based systems.However,the free-space environment is highly complex,and various attenuation factors can significantly reduce the key distribution efficiency or even lead to encoding failures.This paper discusses and analyzes the impact of turbulence and fog in mountainous environments on free-space discrete-variable quantum key distribution.Through numerical simulation,this study examines the effects of altitude and visibility on transmittance and turbulence intensity,finding that turbulence intensity decreases with increasing altitude while transmittance increases;improvements in visibility also lead to increased transmittance.Beam wandering due to turbulence is also dominant.Combining these factors,the effects on the total transmittance and the secret key rate are taken into consideration.Our work could provide a reference for the deployment of practical QKD systems in actual mountainous environments.
文摘The study offers a conceptual framework illuminating sustainable rural development by a continuous cycling interplay among five interdependent systems,physical,social,economic,knowledge,and creative.The framework is applied to analyze the livelihood transition in the economic system and conversion of traditional knowledge in the creative system for farm households engaged in large cardamom cultivation in Northern mountainous region in Vietnam.This study used a probit model to examine a data set comprising 300 households and confirmed that factors within the social and physical systems(such as labor,access to information,social networks,land use,and transportation infrastructure)determined livelihood transition to tourism employment within the economic system.In addition,the conversion of traditional knowledge in the creative system was found to be contingent upon non-farm employment and credit capital in the economic system,as well as traditional knowledge and knowledge exchange in the knowledge system.This study demonstrates how the sustainable development of rural agriculture can be achieved by converting traditional knowledge and transferring livelihood,contributing to attain Sustainable Development Goals 2(Zero Hunger)and SDG 12(Responsible Consumption and Production).
文摘This paper first analyzes the fundamental characteristics and the advantages and disadvantages in the development and utilization of land resources in China s mountainous areas. It then explores the five major strategic tasks facing the sustainable development and utilization of mountainous land resources in China. From the perspective of human-land coordination and sustainable development, the paper proposes countermeasures and recommendations for the sustainable development and utilization of land resources in China s mountainous areas.
文摘Focusing on comprehensive land consolidation in mountainous areas, this paper explores the connotation of comprehensive land consolidation and its internal logic for promoting rural revitalization. Furthermore, it elucidates the effectiveness and experience of mountainous area comprehensive land consolidation in the rural revitalization process by using practical cases. The aim is to provide theoretical reference and practical guidance for leveraging the role of comprehensive land consolidation in mountainous areas for rural revitalization, thereby promoting the sustainable utilization of land resources and the coordinated development of the economy and society in mountainous regions.
基金Supported by National Natural Science Foundation of China(41261018)Scientific Research Foundation of Yunnan Education Committee(2015YUFEYC011)~~
文摘In 2011, Yunnan provincial committee and government proposed the strat- egy of constructing mountainous cities in order to protect farmlands and guarantee crop safety, which makes full use of hills and gentle-slopes and transforms land use pattern. However, social and economic development performs unevenly in Yun- nan, supplemented by varied geographical conditions, so that constructing mountain- ous cities should proceed as per local conditions. The research proposed the con- trol of constructing mountainous cities provided crop safety under the principle of farmland protection and measured the quantities of demanded construction lands ac- cording to science of population prediction and ekistics, based on which the control scales of constructing mountainous cities were determined by multiplying basic farm- land coefficient and the area of newly increased construction lands. The research is of significance for guiding the construction of mountainous cities and avoiding the occupation of construction lands on farmlands.
基金supported by the National Natural Science Foundation of China(Grant No.42061035)the Guizhou Provincial Program on Commercialization of Scientific and Technological Achievements([2022]010)。
文摘The mountainous rural regions of China are undergoing enormous changes in space and time.To a certain extent,this change has increased the difficulties in our understanding of rural development in mountainous areas and brought challenges to development policies and revitalization strategies in mountainous rural regions,especially in karst mountainous areas.In light of the difficulty in and as the key to the development of China's mountainous rural areas,the scientific and systematic construction of indicators for evaluating the level of rural revitalization development and clarifying the level of rural revitalization development and influential factors in karst mountainous areas are of great significance to the implementation of the development of the strategy for the revitalization of the rural areas in karst mountainous areas in China.This study constructed an evaluation index system of the rural regional system and rural revitalization development(RTSRD)from the perspective of rural regional system theory,assessed the spatial differentiation patterns and influential factors of RTSRD,and refined a typical territorial model of rural revitalization development in karst mountainous areas by taking Guizhou Province,a typical karst mountainous region,as a case study area.The evaluation and spatial analyses show that the RTSRD indices of karst mountainous areas in the system perspective show a linear growth trend in all single dimensions,with industrial revitalization(IR)showing the most significant increase each year.In time,the RTSRD of karst mountainous regions has developed from low to high,with evident improvement;spatially,the RTSRD shows the characteristics of‘high in the middle and low in the surroundings,and low in the plateau and low in the depression,'with apparent spatial heterogeneity.In addition,this study found that the spatial and temporal differences in RTSRD result from a combination of endogenous push and exogenous pull in the rural system.In particular,this study has refined a typical regional model of rural revitalization development in karst mountainous regions,which provides theoretical support and case practice for rural development in other karst mountainous regions.At the same time,it provides a basis for decision-making for the county level government and rural development planning.
基金Supported by National Natural Science Foundation of China(41261018)Lianghe Government Authorized Project~~
文摘According to the particularity of towns＇ construction in the southwestern mountainous areas of Yunnan Province, this study has built constructive land suit- ability evaluation index system which is different to flat area. Then this study deter- mined single evaluation factors index and comprehensive suitability index using ＂ex- treme conditions method＂ and ＂suitability index method＂, and analyzed and assessed the constructive land suitability on each evaluation unit polygons and its suitability level by using GIS software. Taking Lianghe County of Dehong Dai-Jingpo Au- tonomous Prefecture as an example to evaluate land suitability in Lianghe County＇s main towns around the gentle slope, the results show, in the evaluation area, the area of land suitable for construction and unsuitable for construction respectively ac- count 73.58% and 26.42%. And first-class, second and third-class of land suitable for construction should be composited at the ratio of about 11：49：40. The suitability evaluation index system and method developed in this paper is applicable for evalu- ating the construction land suitability in mountainous areas of southwest Yunnan Province, and will provide theoretical and technical support for land policy measures which strengthen the protection of farmland and promote the scientific development of urbanization in Yunnan Province and even similar mountainous areas of the whole China.
文摘[Objective] The aim was to investigate ecological carrying capacity of Fangshan District in Beijing. [Method] Ecological footprint and carrying capacity of Fangshan District in 2007 and 2008 were analyzed with ecological footprint model and the difference between ecological footprint and carrying capacity there was con- cluded. Furthermore, an assessment was made on relation between Fangshan de- velopment with local ecological carrying capacity to evaluate sustainable development of Fangshan District. [Result] Fangshan District is of lightly ecological deficit; ecologi- cal footprint per capita in 2007-2008 was deficit and tended to expand. Two meth- ods are available to reduce ecological ：deficit, including reduction of ecological foot- print and increase of carrying capacity. In general, supply and demand of carrying capacity in Fangshan are better, though with some problems. It is necessary to fur- ther develop related industries to final eliminate ecological deficit in order to achieve ecological conservation-orientation and sustainable development of Fangshan District. [Conclusion] The research provides theoretical references for overall evaluation on eco- logical carrying capacity of Fangshan District.
文摘After illustration of research and development process of sightseeing agricultural park,the paper had classified sightseeing agricultural park into sightseeing agricultural park,education agricultural park and agricultural garden in terms of development content;into renovation type and newly-built type in accordance with development mode;and into plain type and mountainous type in the light of terrain.From the perspectives of terrain,vegetation,hydrology and ecology,characteristics of landscape resources in mountainous sightseeing agricultural park were analyzed.It proposed principles for planning and design of mountainous sightseeing agricultural park,which were respecting and protecting nature,linking landscape units and coordinating spatial structure,systematicness and protecting inheritance of traditional culture.On this basis,it had illustrated landscape designing theories on architecture and landscape furniture,traffic road,plant greening and water supply and sewerage works.
基金Under the auspices of National Natural Science Foundation of China(No.42371313,41971268)。
文摘To reduce poverty and promote sustainable development in rural areas,it is crucial to explore the impact of labor mobility on the sustainable livelihoods in mountainous regions.Here,based on a questionnaire survey of farmers and in-depth interview data in the area of the Qinling-Daba Mountains of China in 2021,we analyzed the characteristics of labor mobility,with livelihood capital as the entry point,discussed the impact of labor mobility on farmers’sustainable livelihood using propensity score matching(PSM).The res-ults showed that labor mobility was common in the Qinling-Daba Mountains area,with some form of labor mobility in 61.97%of households.The majority of households had only male mobility,and labor mobility tended to be small in scale,low in frequency,yet permanent and over long distances.Labor mobility had a significantly positive impact on farmers in mountainous regions,increasing the livelihood sustainability of rural households by 7.83%.However,the impact of labor mobility on different livelihood capital was differ-ent,which had the greatest improvement on financial capital,followed by social capital,although it weakened natural capital to some extent.Except for high-frequency mobility,the comprehensive impact of other types of labor mobility was positive.Among them,medi-um-scale mobility,seasonal mobility,inter-provincial mobility,and low-frequency mobility had more pronounced positive effects on farmers’sustainable livelihoods.Our study provided a reference to guide policy on rural migration,with the aim of providing support for the sustainable development of mountainous villages.
基金National Natural Science Foundation of China, No.40635029
文摘Valley economy is a new mode in mountainous area development that is defined by various characters of valley development, and is a distinguishing economical geographic pattern for mountainous area development. The special spatial coupling relations in the distribution of different mountainous elements in valleys are new subjects for the mountain development studies, and such studies are meaningful both for researches and practices. Based on the long term researches on mountainous area development and following a brief exploration into the connotations and the spatial organizing process of valley economy, the authors analyzed the present situations of the development of valley economy in Beijing＇s mountainous areas, studied the characteristics and the impacts of the spatial structural changes of the valley economy in Beijing＇s mountainous areas, and finally proposed a rational arrangement of the spatial structure of the valley economy in Beijing＇s mountainous areas. It is considered in this study that valley economy plays an important role in the development and functional transformation in Beijing＇s mountainous areas in the new epoch. Firstly, valley economy is not outlined by the administrative boundaries, and it connects most of the villages in the mountainous areas roughly along the major transportation lines. Therefore, valley economy can exert positive influence on the development in the mountainous areas, at least in the aspects such as the rearrangement of industrial structure in the mountainous areas and the coordinated development of rural and urban areas. In addition, it is found that the valley economy in Beijing＇s mountainous areas is evolved in a spatial organizing stage of secondary concentration, which is characterized by resource-saving, ecological protection and industrial optimization. Therefore, the development of valley economy will be helpful to the coordination between ecological protection and economic development in the mountainous areas, and will promote the integrated development of the mountainous areas. The developing mode of the valley economy in Beijing＇s mountainous areas will provide the basis for the decision-making in the transformation of the functional roles of Beijing＇s mountainous areas, and on the other hand, will present experiences for the studies in the mountainous areas outside of Beijing.
基金Supported by Technology Item of Ankang City(09AK06-02)~~
文摘Based on introducing wild plant resources of vertical greening in Qin-ba Mountainous area, the application of vertical greening plants of Qin-ba Mountainous area in garden greening were analyzed, the measures of utilization and development were suggested.
文摘The economic and social development status and the formation mechanism of "poverty trap" in Wumeng mountainous area were analyzed, the feasibility of developing eco-tourism to ecological restoration and rural poverty reduction was discussed, and some corresponding countermeasures were put forward.
文摘With the urban green space system planning of small cities in mountainous areas as the study object,the planning practices are analyzed and studied to summarize the common characteristics of urban green space system planning in those small cities.Being combined with relevant national standards and regulations,the problems that those small cities are faced with in their urban green space system planning are analyzed,then corresponding countermeasures and suggestions are put forward to resolve problems in the practical planning.
文摘By studying the planning of Aoshan Park in Jianyang City,a typical eco-park in mountainous regions,the authors analyzed its topography and vegetations,specifically,vegetation types and plant species,and pointed out problems of its present vegetations based on the evaluation.By maintaining existing indigenous plant species,plant planning and ecological corridor design was carried out to rebuild the eco-forest belt of Mt.Aoshan and optimize landscapes in Aoshan Park.Plant landscaping of Aoshan Park,by following the principles of "ecological" and "right trees for right land",has 3 different styles:natural,regular and mixed.Regular style is mainly located in the cultural experience area by applying regular planting types,such as coupled planting and mass planting;natural style runs through the park from north to south,and takes seasonal changes of landscapes as the theme to show the attraction of nature;mixed style is mainly applied in the recreational vacation area,connecting all independent scenic spots by water.The design of ecological corridor should follow the principle of "integrated,protective and diversified",attach more importance to the construction of mountain corridor system,ecological road and river corridors.Several species were recommended for vegetation recovery and slope greening in the study area.And corresponding suggestions were given for the planning and design of eco-park in mountainous regions.
基金Supported by National Natural Science Foundation of China(40961004,40761027)Guangxi Natural Science Foundation(2011jjA50016)+1 种基金Guangxi Philosophy and Social Science Research Project of 11th Five-Year Plan(06FJY023)Key Laboratory Funds of Ministry of Education(B3G1110)~~
文摘Damp-heat karst mountainous areas are unique areas in terms of socialeconomic development, resource endowment and eco-environment in China, where natural resources are abundant,unique and diverse. However, fragile eco-environment, undeveloped economy and culture, and conflict of human and environment should not be ignored. In the research, a framework of integration of resource-development and environment-protection in damp-heat karst was designed on basis of resource and environment integration, which was applied to Daxin County in Guangxi Province. Furthermore, some integration models were proposed, including integration of development of characteristic agricultural resources and protection of eco-environment, integration of development of manganese ore resources and protection of eco-environment, integration of development of tourism resources and protection of ecoenvironment and integration of development of clean energy and protection of eco-environment.
