Total phosphorus accident pollution and emergency response study based on geographic information system in Three Gorges Reservoir area

摘要: In recent years, sudden water pollution accidents in China’s rivers have become more frequent, resulting considerable effects on environmental safety. Therefore, it is necessary to simulate and predict accidents. Simulation prediction provide strong support for emergency disposal disaster reduction. This paper describes a new two-dimensional quantity the quality model that incorporates digital elevation into geographic information system. The used main stream of Yangtze River Jialing Chongqing section Three Gorges Reservoir area. sectional velocity distribution concentration change total phosphorus are then analyzed under four hydrological situations. results show proposed accurately simulates predicts migration process speed diffusion pollutants found be greatest flood season, followed by storage period, drawdown dry order. selection an appropriate scheduling scheme can reduce peak river pollutants. study enables impact ecological environment alleviated, provides scientific basis response