Analysis on Geomorphology Change of Yangtze River Tributaries after the Impoundment of Three Gorges Reservoir - Set the Xiaojiang River in Chongqing China as Example

After the impoundment of the Three Gorges Reservoir, geomorphology of the Yangtze River tributaries changed greatly. The Xiaojiang River in Chongqing is a representative tributary because of the unique local features on geographical conditions, hydrology conditions, migration and riparian zone. It is significant to explore and analyze the geomorphology change of the Xiaojiang River after the impoundment of the Three Gorges Reservoir for studying the feature of the Xiaojiang River channels. In this paper the geomorphology change law of the Xiaojiang River was calculated and analyzed based on the 2D Hydrodynamic and sediment models, and a few suggestions for protecting, developing and managing the Xiaojiang River are made from the conclusion of the analysis.