日平均输沙率不同计算方法比较分析

Comparative Analysis of Daily Average Sediment Transport Rate Calculation Methods

新的水文资料整编规范列出流量加权法的3种悬移质日平均输沙率的计算方法,不同的计算方法对结果精度影响较大,对河道冲於变化、淤积分析等研究有着直接的影响。新的水文资料整编规范计算悬移质日平均输沙率要求采用流量加权第三法即积分法,而目前的水文资料整编软件采用了老规范的流量加权第一法即四八法,本文用四八法和积分法计算多年的资料进行对比分析,阐述了采用两种方法计算日平均输沙率对输沙资料的影响。

Three types of suspended load daily average sediment transport rate calculation methods have a direct impact on the study of river erosion changes and sedimentation analysis. At present, the main hydrological data compilation software adopts the first method of flow weighting, namely the four-eight method, and the hydrological data compilation specification requires the use of the third method weighted by flow, namely the integral method. This study compares and analyzes the data calculated by the four-eight method and the integral method, and expounds the influence of using the integral method to calculate the daily average sediment transport rate.