Author(s): Guanglei Duan; Yanbo Peng; Huafang Yang
Linked Author(s):
Keywords: Three Gorges Project; Jingjiang River; Sediment load; Armoring
Abstract: The TGP (the Three Gorges Project), which began to impound in June 2003, is the largest hydropower project under construction in the world. It is expected to alleviate the pressure of flood risk of the Jingjiang River. The sediment load entering into the Jingjiang River has reduced obviously and the riverbed has been eroded because of the reduction, as the Three Gorges Project trapped plenty of sediment in 2003. Based on field data from the hydrological stations on the Jingjiang River in 2002 and 2003, this paper analyses the change of the suspended sediment concentration, its size distribution and characteristics of the suspended sediment and bed material of the Jingjiang River in the initial impounding period of the TGP. Results indicate that the sediment load entering into the Jingjiang River decreased greatly and the exchange between the coarse particles of suspended sediment and the fine particles of bed material has resulted in the armoring of river bed.
Year: 2004