Abstract
Rivers are constantly changing under the combined influence of nature and human activities. When exploring the evolution law and morphological characteristics of natural rivers, scholars at home and abroad have introduced many characteristic parameters for quantitative analysis, and the bankfull discharge has always been an important index in the study of riverbed evolution. This paper compares the different calculation methods of bankfull discharge and analyzes the influence factors that lead to the fluctuation of bankfull discharge, and draws two conclusions. On the one hand, in the future, when optimizing and improving the method of calculating bankfull discharge, two points can be mainly grasped: reducing subjective error and improving accuracy. On the other hand, there are many factors that affect the flow of the bankfull discharge, so the accuracy and effectiveness of the basic parameters must be paid attention to in the determination.
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