黄河宁蒙河段2018年汛期水沙特性分析.

Rainstorms were frequent in the Yellow River basin during the flood season in 2018 and 3 numbered flood process at the mainstream, the high water level and large flow lasted for three months in Ningmeng reach. The paper analyzed the characteristics of rainfall and runoff, flood routing and sediment concentration process during the flood season of Ningmeng reach. The erosion-deposition variation and flow capacity of Ningmeng reach were analyzed through sections arbitrage of main hydrological station, calculation of section area under the same level and relation curve drawing of water level and area. The results show that the average precipitation and inflow during flood season of Ningmeng reach in 2018 are more than the average over the years, and there are three larger flood processes with high water level, large discharge and three large sediment peak process in Ningxia reach. The channel scouring is obvious and the flood carrying capacity has been increased significantly during the flood season of Ningmeng reach. In addition to Toudaoguai hydrologic section, all the sections below Shizuishan Hydrologic Station occur obvious scouring process. [ABSTRACT FROM AUTHOR]