黄河郑州段河道冲淤变化及影响因素研究

Siltation and Erosion in Zhengzhou Section of the Yellow River Channel and Its Influencing Factors

以黄河下游郑州段多时段的遥感影像及水文资料为主要数据源,对黄河郑州段河道的淤积与演变及其与水沙的关系进行了研究。结果表明:黄河郑州段河道岸线、河道宽度、曲流位置和角度都有变化,且年际变化大;小浪底水库的投入运用,控制了下游的来水来沙条件,造成河道的摆动幅度减小,但弯曲长度增加,横河、斜河呈发展趋势;河道冲淤变化的主要影响因素为流量变化。

Taking the multi remote sensing images dated and hydrological data as the main data sources, the changes in siltation and erosion of the Yellow River in Zhengzhou section were studied. Tile results show that the river shoreline, channel width, meandering position and angle have changed, and inter-annual change is big. With the application of Xiaolangdi Reservoir, the coming water and sediment conditions of the down- stream have been controlled. The swing range of the river channel becomes smaller, but the bending length becomes longer. The transverse current and oblique flows are developing. The main factor of channel siltation and erosion is the flow change.