基于断面岸边系数法的河流水位流量流速面积算法研究与应用

目前河流流量计算方法多采用数值积分近似代替实际单宽流量曲线对河宽的函数积分,该方法由于忽略了计算死水区和岸边河流的流速,从而产生较大的流量误差,分析了各算法的代数精度与截断误差,提出了一种新的流速面积计算方法,通过采用断面岸边系数法计算河流流量,并通过实验数据验证了该算法的精度,对河流流量计算方法具有一定的理论参考价值。

Study and Application of River Water Level and Discharge on Velocity-area Method Based on Cross-sectional Shore Coefficient Method

Currently river flow calculation method to use numerical integration approximation instead of the actual flow rate per unit width of the river is a function of the integral curve, which is calculated by ignoring the dead zones and flow shore of the river, resulting in a greater flow error problem. This paper studies the algorithms of velocity-area method in river discharge measuring ,and deduced their algebraic accuracy and truncation error. This paper proposed a new method to calculate the flow rate of the area, the river flow is calculated by using a cross-sectional shore coefficient method and experimental data to verify the accuracy of the algorithm. Through all these comparison, this paper proposes a modified algorithm which is more accurate and more convenient for measuring.