Multi-source Remote Sensing Data Application Study On Poyang Lake Water Environment

Environmental protection and management is a key problem of sustainable development in 21st Century, and water environment security plays an important role in environment construction. Poyang lake is located at downstream of the Changjiang River and its water environment problems attract special attention since it is one of the seven international wetlands and the largest freshwater lake in China. It is easy to suffer flood disaster and is an important flood-store-area of Changjiang River. So related research is practically meaningful.Distributed hydrological model is good at modeling hydrological cycle, but input data hinders its application. At the same time, combination of remote sensing and other sciences is one of the aims of remote sensing applications. Application of remote sensing technology into hydrology is highly expected.Remote sensing application in water environment study is not limited in combination of remote sensing data with distributed hydrological model. Water level is a regional response indicator of global change. Remote sensing technology provides a new method for measuring water level and water storage variation.Focused on water problems of Poyang Lake, this dissertation explores combination of distributed hydrological model with remotes sensing data, and introduces the new method of retrieving water level and water storage from remote sensing data. The main contents of the dissertation are listed below:(1) To improve the simulation results of VIC model by using parameters derived from remote sensing data including watershed physical parameters, landcover, vegetation parameters (Albedo, LAI) as its input data.(2) Based on analysis of landcover and climate variation, we construct several possible landcover and climate modes and analysis their hydrological responses.(3) To introduce and explore the method of using altimetry to retrieve...