Formation and Transformation Mechanism of Low-Waterway

Abstract

In recent years, the river bed level of our country has been degraded by dam constructions, and sand and gravel digging. The degradation has influenced the properties of alternating bars, by which the low-waterway is formed, and later, it is transformed by erosion. In this study, flume experiment surveys were carried out to investigate the changes in bar properties, and the formation and transformation mechanism of low-waterways by the thalweg, during a low water periods. Thus the authors determined the upper and lower limit conditions for the formation of a low-waterway.