Abstract

Influence of slope change on sediment erosion is studied basing on 16 groups of experiments of sediment-carrying flow with 3 different kinds of consolidation time in generalized experimental flume series. Research result shows that total sediment erosion amount of every experiment differs little under the condition of small slope, but it will change sensitively if the slope increases and longer consolidation time brings less erosion amount under the same slope. Farther, 2 groups of experiments with longer consolidation time are conducted in order to study the influence of consolidation time on erosion, and the result is that the longer the consolidation time is, the less erosion amount will be made. Lastly, the anterior research achievement is utilized to analyze the qualitative restoration degree of river erosion in the reservoir after the dam is removed preliminarily. According to the research, total sediment erosion amount will not change greatly even with longer consolidation time after a long period of consolidation. With certain erosion intensity and slope, longer time of consolidation always brings smaller erosion amount and short time of consolidation always brings larger erosion amount.

Keywords: Consolidation time slope erosion restoration degree