Author(s): Guangqian Wang; Li He; Xudong Fu; Baosheng Wu; Chunhong Hu
Linked Author(s): Guangqian Wang
Keywords: No Keywords
Abstract: It is necessary to evaluate the impact of water and soil conservation measures in upland on fluvial evolution in the lower. Based on the coupling simulation of Digital Yellow River Model and the one-dimensional model for hyper-concentrated flow, the connection between sediment and runoff yielding in the Rich and Coarse Sediment Area and sedimentation in the lower channel is assessed. For the benchmark year of 1977, developed land-use (changing to forest or grass) can reduce water and sediment entering the middle and lower channel, the reduction of sediment load is larger. More managed area leads to more reduction of water and sediment, especially the sediment load, which is more advantageous to the reduction of sediment deposition in lower channel. Xiaolangdi-Lijin reach can benefits more from less soil loss than Longmen-Sanmenxia reach, especially the Huayuankou-Gaocun reach. In terms of the deposition reduction effect in each kilometer, the reduction of sedimentation in Tongguang-Sanmenxia and Huayuankou-Gaoccun sub-reaches is larger when sediment load reduces, and the discrepancy of deposition reduction ratio by runoff volume or sediment load reducing are more evident.
Year: 2009