Approaches on Impact Evaluation of Ecological Environment for Hydropower Development in the Main Stream of Jinsha River Using GIS

• 1、State Key Laboratory for Geo-hazard Prevention，Chengdu University of Technology

Abstract：Based on features of ecological environment and hydropower development in the main stream of Jinsha River, this paper established index systems for impact evaluation of ecological environment including advantage factors and disadvantage factors. The advantage factors involved wetland and climate; the disadvantage factors involved aquatic ecological, terrestrial vegetation, water pollution and ecological sensitive area. The established index systems can generalize laws and features of watershed ecological environment evaluation of Jinsha River. Ecological environment evaluation model is established using technical routes of “minimum environment sensitivity corridor”. Integrated impact evaluation of ecological environment is completed using GIS methodology. Based on analysis on river geomorphology, geological environment, each reservoir features and impact situation, brief analysis and evaluation of each sections of reservoir ecological environment are further done. At last reservoir areas are divided into 12 first level sections and 26 sub-level sections for impact evaluation of ecological environment for hydro-power development. The study results supply hydro-power flier development and environment protection with scientific basis.

Keywords： the main stream of Jinsha River hydro-power development ecological environment evaluation model GIS