检索结果-内蒙古大学图书馆

Rural labor migration and farmers’arrangements of rice production systems in Central China:Insight from the intergenerational division of labor

引用

Journal of Integrative Agriculture 2024年第9期23卷 3200-3214页

作者： Xue Shen Quanyu Yang Rongjun Ao Shengsheng Gong Key Laboratory for Geographical Process Analysis&Simulation of Hubei Province/College of Urban and Environmental Sciences Central China Normal UniversityWuhan 430079China

Rice production is crucial for food security in China,and its relationship with rural labor migration has been studied *** migration in rural China has taken new forms in recent *** has been a discernible trend wherein adult children have started migrating to cities while their elderly parents return to villages to re-engage in on-farm *** phenomenon has notably shaped the intergenerational division of labor(IDL)within ***,it remains to be seen how farmers adjust their rice production systems in response to the *** age of 60 years for employment injury insurance is the eligibility threshold for off-farm employment and is used to obtain a source of exogenous variation in the *** on a representative household survey of 1,752 rice farmers in the Hubei Province of Central China,our fuzzy regression discontinuity analysis reveals that farmers in IDL households are more likely to adopt ratoon rice(RR)than single cropping rice(SR)or double cropping rice(DR).The effect of the IDL varies under different levels of operational scales and specialized agricultural service *** analysis suggests that farmers’arrangements are associated with two potential mechanisms of downward intergenerational *** transfer for urban housing purchases increases RR in IDL households,and time transfer for intergenerational childcare significantly promotes SR in IDL *** study enhances the understanding of the relationship between rural labor migration and rice production in China,providing a reference for adjusting rice production systems to ensure food security.

关键词： labor migration intergenerational division of labor rice production systems fuzzy regression discontinuity Central China

来源：评论

学校读者我要写书评

暂无评论

Mapping winter rapeseed in South China using Sentinel-2 data based on a novel separability index

引用

Journal of Integrative Agriculture 2023年第6期22卷 1645-1657页

作者： TAO Jian-bin ZHANG Xin-yue WU Qi-fan WANG Yun Key Laboratory for Geographical Process Analysis&Simulation of Hubei Province/School of Urban and Environmental Sciences Central China Normal UniversityWuhan 430079P.R.China

Large-scale crop mapping using remote sensing data is of great significance for agricultural production, food security and the sustainable development of human societies. Winter rapeseed is an important oil crop in China that is mainly distributed in the Yangtze River Valley. Traditional winter rapeseed mapping practices are insufficient since they only use the spectral characteristics during the critical phenological period of winter rapeseed, which are usually limited to a small region and cannot meet the needs of large-scale applications. In this study, a novel phenology-based winter rapeseed index(PWRI) was proposed to map winter rapeseed in the Yangtze River Valley. PWRI expands the date window for distinguishing winter rapeseed and winter wheat, and it has good separability throughout the flowering period of winter rapeseed. PWRI also improves the separability of winter rapeseed and winter wheat, which traditionally have been two easily confused winter crops. A PWRI-based method was applied to the Middle Reaches of the Yangtze River Valley to map winter rapeseed on the Google Earth Engine platform. Time series composited Sentinel-2 data were used to map winter rapeseed with 10 m resolution. The mapping achieved a good result with overall accuracy and kappa coefficients exceeding 92% and 0.85, respectively. The PWRI-based method provides a new solution for high spatial resolution winter rapeseed mapping at a large scale.

关键词： phenology-based winter rapeseed index winter rapeseed mapping Sentinel-2 Google Earth Engine

来源：评论

学校读者我要写书评

暂无评论

Evaluation, simulation, and optimization of land use spatial patterns for high-quality development: A case study of Zhengzhou city, China

引用

Journal of geographical Sciences 2023年第2期33卷 266-288页

作者： ZHU Wenchao JIANG Zhimeng CEN Luyu WU Hao College of Urban and Environmental Sciences Central China Normal UniversityWuhan 430079China Hubei Province Key Laboratory for Geographical Process Analysis and Simulation Central China Normal UniversityWuhan 430079China

High-intensity land use and resource overloaded-induced regional land use spatial pattern(LUSP)are essential and challenging for high-quality *** empirical studies have shown that a scientific land uses spatial layout,and the supporting system should be based on a historical perspective and require better considering the double influence between the current characteristics and future *** study proposes a comprehensive framework that integrates the resource environment carrying capacity(RECC)and land use change(LUC)to investigate strategies for optimizing the spatial pattern of land use for high-quality ***’s Zhengzhou city was the subject of a case study whose datasets include remote sensing,spatial monitoring,statistics,and open *** significant results emerged from the analysis:(1)The RECC has significant spatial differentiation but does not follow a specific spatial law,and regions with relatively perfect ecosystems may not necessarily have better RECC.(2)From 2020 to 2030,the construction land and farmland will fluctuate wildly,with the former increasing by 346.21 km^(2) and the latter decreasing by 295.98 km^(2).(3)The study area is divided into five zones,including resource conservation,ecological carrying,living core,suitable construction,and grain supply zones,and each one has its LUSP optimization *** uneven distribution of RECC reflects functional defects in the development and utilization of *** addition,the increase in construction land and the sharp decline of farmland pose potential threats to the sustainable development of the study ***,these two elements cannot be ignored in the future high-quality development *** findings indicate that the LUSP optimization based on dual dimensions of RECC and LUC is more realistic than a single-dimension solution,exhibiting the LUSP optimization’s effectiveness and applicability.

关键词： land use spatial pattern resource environment carrying capacity land use change spatial optimization high-quality land development Zhengzhou city

来源：评论

学校读者我要写书评

暂无评论

Epidemiological-survey-based multidimensional modeling for understanding daily mobility during the COVID-19 pandemic across urban-rural gradient in the Chinese mainland

引用

Geo-Spatial Information Science 2023年第4期26卷 603-615页

作者： Feng Zhao Zixuan Dai Wenyu Zhang Yiting Shan Cheng Fu Key Laboratory of Geographical Process Analysis&Simulation of Hubei Province Central China Normal UniversityWuhanChina College of Urban and Environmental Sciences Central China Normal UniversityWuhanChina Department of Geography University of ZurichZurichSwitzerland

Human mobility survey data usually suffer from a lack of resources for *** survey records,which are released to the public as a containment measure by local authorities,provide place visitation details validated by the *** study collected and analyzed the epidemiological survey reports published by local governments in the Chinese mainland,between January 2020 and November *** reveal the mobility patterns during the COVID-19 pandemic across the urban-rural gradient in China’s mainland,we derived key mobility indicators from the epidemiological survey data from rural to *** then applied exploratory factor analysis to identify latent factors that affected people’s *** found that the pandemic poses varying impacts across the urban-rural gradient in the Chinese mainland,and the mobility patterns of middle and small cities are more *** results also showed that the pandemic did not enlarge gender gap in people’s mobility,as gender was not a significant driving factor for explaining people’s quantity of out-of-home activities as well as extent of life space,while age group and city levels were ***,we argue that the epidemiological survey data are valuable data sources for daily mobility modeling,especially for relevant studies to understand human mobility patterns during the pandemic.

关键词： Human mobility epidemiological survey exploratory factor analysis gender gap urban-rural gap COVID-19 pandemic

来源：评论

学校读者我要写书评

暂无评论

Unique landslides (loess slide-flows) induced by an extreme rainstorm in 2018 on the Loess Plateau: A new geological hazard and erosion process

引用

International Journal of Sediment Research 2023年第2期38卷 228-239页

作者： Li Luo Wen-Zhao Guo Pei Tian Yi-li Liu Shao-Kun Wang Jia-Wei Luo State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau/College of Water Resources and Architectural Engineering Northwest Agriculture and Forestry University State Key Laboratory of Geohazard Prevention and Geoenvironment Protection Chengdu University of Technology Key Laboratory for Geographical Process Analysis & Simulation of Hubei Province Central China Normal University

Currently, the vegetation has recovered well in most areas of the Loess Plateau in China, and soil erosion has significantly decreased. However, the heavy rainfall event in July 2018 triggered many instances of a unique type of loess landslides（i.e., slide-flows） on the gully-slopes with vegetation recovery in the Nanxiaohegou Basin on the Loess Plateau. This rainfall event was unusual and was a persistent heavy rainfall. The accumulated rainfall from 24 June to 10 July was 232.2 mm, which comprised 42% of the mean annual rainfall. A loess slide-flow is characterized by combining two movement types of the slide and flow. The loess slide-flows first slide on the gully-slopes and then turn into long run-out earthflows moving downstream, delivering vast amounts of sediment to the river. The average landslide erosion rates were 110.8-134.9 kg/m2. These loess slide-flows generally did not occur individually but in groups,which were characterized by large numbers, high density, small scale, and shallow depth. The changes of vegetation characteristics and soil characteristics both had a significant impact on the scale of the landslides. Grass with high coverage had an adverse effect on the occurrence of shallow landslides. The adverse hydrological effects of the plant may offset the weak root reinforcement. Loess slide-flows have become a new geological hazard and erosion process on the Loess Plateau. Loess slide-flows are a prominent ecological and environmental problem after vegetation restoration, and more attention should be paid to loess slide-flows in the future.

关键词： Loess plateau Landslide Soil erosion Vegetation Rainfall

来源：评论

学校读者我要写书评

暂无评论

Neural Cellular Automata-based Land Use Changes simulation

Neural Cellular Automata-based Land Use Changes Simulation

引用

ISPRS Technical Commission I Midterm Symposium on Intelligent Sensing and Remote Sensing Application

作者： Zhang, Jinian Liu, Lanfa College of Urban and Environmental Sciences Central China Normal University Wuhan China Hubei Provincial Key Laboratory for Geographical Process Analysis and Simulation Central China Normal University Wuhan China

Simulating land use and land cover changes (LUCC) is important for urban planning and environmental studies. In this study, we introduce a neural cellular automata (NCA) model that integrates biological principles and convolutional neural networks (CNNs) for land use simulation. We conduct experiments in the city of Wuhan, China. The NCA model achieved the highest performance with an OA of 0.858, F1 score of 0.753, Kappa coefficient of 0.799, and FOM of 0.427. Comparisons of land use data of Wuhan city from 2000 and 2010 with the simulated optimal results indicate that forest areas closer to urban centers are more susceptible to modernization processes, showing the advantage of NCA in accurately simulating land use changes in the central urban area. © Author(s) 2024.

关键词： Land use

来源：评论

学校读者我要写书评

暂无评论

Carbon Emission Effects Driven by Evolution of Chinese Dietary Structure from 1987 to 2020

引用

Chinese geographical Science 2024年第1期34卷 181-194页

作者： ZHU Yuanyuan ZHANG Yan ZHU Xiaohua Key Laboratory of Geographic Process Analysis&Simulation Hubei Province Central China Normal UniversityWuhan430079China Institute of Geographic Sciences and Natural Resources Research Chinese Academy of SciencesBeijing100101China

Exploring carbon emission effects based on the evolution of residents’ dietary structure to achieve the carbon neutrality goal and mitigate climate change is an important *** study took China as the research object(data excluding Hong Kong,Macao and Taiwan) and used the carbon emission coefficient method to quantitatively measure the food carbon emissions from 1987–2020,then analyzed the carbon emission effects under the evolution of dietary *** results showed that during the study period,the Chinese dietary structure gradually changed to a high-carbon consumption *** dietary structure of urban residents developed to a balanced one,while that of rural residents developed to a high-quality *** the study period,the per capita food carbon emissions and total food consumption of Chinese showed an increasing *** per capita food carbon emissions of residents in urban and rural showed an overall upward *** total food carbon emissions in urban increased significantly,while that in rural increased first and then *** influence of beef and mutton on carbon emissions is the highest in dietary *** with the balanced dietary pattern,the food carbon emissions of Chinese residents had not yet reached the peak,but were evolving to a high-carbon consumption pattern.

关键词： dietary structure structural evolution carbon emission effects carbon neutrality China

来源：评论

学校读者我要写书评

暂无评论

Influence of vegetation type and topographic position on volumetric soil water content dynamics and similarity among surface and deep soil layers

引用

International Soil and Water Conservation Research 2023年第1期11卷 183-196页

作者： Muxing Liu Qiuyue Wang Jun Yi Hailin Zhang Ji Liu Wei Hu Key Laboratory for Geographical Process Analysis&Simulation Hubei ProvinceWuhan430079China College of Urban and Environmental Sciences Central China Normal UniversityWuhan430079China The New Zealand Institute for Plant and Food Research Limited Private Bag 4704Christchurch8140New Zealand

Clarifying the mechanisms governing volumetric soil water content(VSWC)dynamics in soil profiles is essential,as it can help to elucidate soil water transport processes and improve the prediction accuracy of soil hydrological *** Spearman's rank correlation and wavelet coherence analysis methods,similarity in soil profile VSWC dynamics and factors governing VSWC soil profile dynamics in upslopes and downslopes under three vegetation types(evergreen forest[EG],secondary deciduous forest mixed with shrubs[SDFS],and deforested pasture[DP])at different time scales(hourly,daily,weekly,and monthly)and in different seasons were *** results revealed significant similarity in the VSWC of different soil depths(P<0.01),with the similarity decreasing in accordance with the increment in soil *** VSWC similarity was found in EG than SDFS and DP sites and in upslope than downslope areas at both forest *** average significant coherence area(SCA)of VSWC similarity among surface and deep soil layers varied with the time scale,which was in the order of monthly(58.6%)>weekly(42.8%)>daily(21.8%).The effects of soil properties(e.g.,texture,saturated hydraulic conductivity),rainfall,and potential evapotranspiration(ET_(p))on VSWC similarity were related to the time scale and season in which VSWC monitoring took *** properties had apparent effects on VSWC similarity at longer time scales(i.e.,monthly),with a high *** contrast,the effects of rainfall and ET_(p) on VSWC similarity were concentrated at weekly and daily scales,with a relatively low *** and ET_(p) dominated VSWC dynamics in the summer and fall,*** results imply the use of measured VSWC at one soil depth to predict the VSWC at other soil depths was a reliable *** the in-fluence of time scale effects and seasonal variations on prediction accuracy of VSWC should be considered.

关键词： Volumetric soil water content Wavelet analysis Significant coherence area Time scale Vegetation type Slope postion

来源：评论

学校读者我要写书评

暂无评论

Influences of rock fragments on the hydraulics and erosion of concentrated runoff in steep spoil heaps on the Loess Plateau of China

引用

International Journal of Sediment Research 2022年第5期37卷 553-562页

作者： Wenzhao Guo Hongliang Kang Xiao Yu Wenlong Wang Pei Tian State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau Institute of Water and Soil Conservation Northwest Agriculture & Forestry University Key Laboratory for Geographical Process Analysis & Simulation of Hubei Province Central China Normal University

The soil-rock mixed spoil heaps are prone to severe soil erosion during heavy rain, causing severe land degradation and ecological and environmental damage. Nevertheless, past research on the erosion on spoil heaps has focused on soil particles that were readily eroded and disregarded the rock fragments(RF) that were not readily eroded. To explore the effect of the RF embedded in spoil heaps on the hydraulics of and erosion caused by concentrated runoff, scour-erosion experiments were implemented on three types of spoil heaps: RF = 7%, RF = 45%, and RF = 69%. The RF clearly reduced runoff and erosion on steep spoil heaps. As the RF increased from 7% to 69%, the runoff intensity and runoff coefficient decreased by 72.9%-79.1% and 83.2%-84.1% respectively, and the sediment concentration, soil denudation rate, and total soil loss decreased by 36.0%-47.8%, 83.7%-87.1%, and 87.0%-92.3%, *** rills were generated during the experiments, and the RF distinctly influenced the rill characteristics. High contents of RF restrained rill retreating and undercutting, and promoted rill widening. With an increase in RF, the flow shear stress and stream power gradually decreased, and the Darcy-Weisbach roughness coefficient increased. These findings imply that the RF dissipated the flow energy and reduced soil detachment capacity and sediment transport capacity. Soil detachment is strongly related to the Darcy-Weisbach roughness coefficient, Reynolds number, and runoff intensity,which may be the preferred descriptors of soil detachment. The current findings indicate that embedded rock fragments could effectively reduce soil loss on steep spoil heaps.

关键词： Soil erosion Runoff Rock fragments (RF) Rills Chinese loess plateau

来源：评论

学校读者我要写书评

暂无评论

Evaluation of soil erosion vulnerability in Hubei Province of China using RUSLE model and combination weighting method

引用

Journal of Mountain Science 2024年第10期21卷 3318-3336页

作者： YANG Yanpan TIAN Pei JIA Tinghui WANG Fei YANG Yang HUANG Jianwu Key Laboratory for Geographical Process Analysis&Simulation of Hubei Province Central China Normal UniversityWuhan 430079China College of Urban and Environmental Sciences Central China Normal UniversityWuhan 430079China Department of Civil and Environmental Engineering University of AlbertaEdmontonABT6G 1H9Canada

Soil erosion has been recognized as a critical environmental issue *** previous studies have primarily focused on watershed-scale soil erosion vulnerability from a natural factor perspective,there is a notable gap in understanding the intricate interplay between natural and socio-economic factors,especially in the context of spatial heterogeneity and nonlinear impacts of human-land *** address this,our study evaluates the soil erosion vulnerability at a provincial scale,taking Hubei Province as a case study to explore the combined effects of natural and socio-economic *** developed an evaluation index system based on 15 indicators of soil erosion vulnerability:exposure,sensitivity,and *** addition,the combination weighting method was applied to determine index weights,and the spatial interaction was analyzed using spatial autocorrelation,geographical temporally weighted regression and geographical *** results showed an overall decreasing soil erosion intensity in Hubei Province during 2000 and *** soil erosion vulnerability increased before 2000 and *** areas with high soil erosion vulnerability were mainly confined in the central and southern regions of Hubei Province(Xiantao,Tianmen,Qianjiang and Ezhou)with obvious spatial aggregation that intensified over *** factors(habitat quality index)had negative impacts on soil erosion vulnerability,whereas socio-economic factors(population density)showed substantial spatial variability in their *** was a positive correlation between soil erosion vulnerability and erosion intensity,with the correlation coefficients ranging from-0.41 and *** increase of slope was found to enhance the positive correlation between soil erosion vulnerability and intensity.

关键词： Soil erosion vulnerability RUSLE model Combination weighting method Driving factors Spatial heterogeneity

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：