Geological risk assessment for the rapid development area of the Erhai Basin |
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| Institution: | 1. School of Public Administration, China University of Geosciences, Wuhan 430074, China;2. The Institute of International Education, Wuhan University of Textile, Wuhan 430073, China;3. Faculty of Resources and Environmental Science, Hubei University, Wuhan 430062, China;4. Center for Chinese Agricultural Policy, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China;1. MOE Key Laboratory of Road and Traffic Engineering, College of Transportation Engineering, Tongji University, Shanghai 201804, China;2. Glenn Department of Civil Engineering, Clemson University, SC 29634-0911, USA;3. Faculty of Engineering, China University of Geosciences, Wuhan 430074, China;1. Irstea Lyon, Freshwater Ecosystem, Ecology and Pollution Research Unit, 5 rue de la Doua, 69616 Villeurbanne Cedex, France;2. Univ Lyon, CNRS, Université Claude Bernard Lyon 1, ENS de Lyon, Institut des Sciences Analytiques, UMR 5280, Villeurbanne, France;3. Institut de Systématique, Evolution, Biodiversité ISYEB – UMR 7205 – MNHN CNRS UPMC EPHE, Muséum National d’Histoire Naturelle, Sorbonne Universités, Paris, France |
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| Abstract: | For low-slope hilly land development to have more new land space in a watershed, it is particularly important that to coordinate the sharply increasing conflicts between mountainous and urban land utilization in the city. However, development of low-slope hilly land easily induce potential risks of geologic hazards such as landslide and landslip. It may lead to further environmental losses in a watershed. Hence, it is necessary to study potential risks of geo-hazards in low-slope hilly land development in urban area. Based on GIS spatial analysis technique, we select a study area, Dali City in the Erhai Basin located in watershed belt of Jinsha River, Lancang River and Red River in Yunnan Province of China. Through studying some relevant key indexes and parameters for monitoring potential risks of geo-hazards, we establish a composite index model for zoning the area with potential risks of geo-hazards in development of low-slope hilly land in the study area. Our research findings indicate that the potential risks of geo-hazards in eastern Dali City is relatively low while of that on slow hills with gentle slopes in the western area are relatively high. By using a zoning research method, generated maps show geological information of potential risks of geo-hazards on low-slope hilly land which provide important messages for guarding against natural geo-hazards and potential environmental losses in a watershed. |
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| Keywords: | Low-slope hilly land Land development Land use change Geologic hazard Risk assessment Watershed |
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