论流量影响线法参数误差对计算流量的影响

Influence discussion of parameter errors on calculation flow using flow influence line method

使用单参数分析法、通过VB编程计算,解决流量影响线法各参数测量精度要求的问题,得到"标定洪水高程"、糙率系数和雨量系列的误差对计算流量精度影响较大,其他参数影响较小的结论。如果将前三者测量误差控制在5%以内,其他参数控制在10%以内,可以保证流量影响线法的精度。该结论可供桥涵水文勘测参考,有利于提高流量影响线法的计算精度,并提高经济效益。

This paper aims to resolve the question of each parameter measurement precision requirement of flow influence line method, with single variable analysis method and using VB programming calculation. The conclu- sions are made that the measurement error of ＂calibration flood elevation＂ , roughness coefficient and rainfall se- ries have large effect on the accuracy of calculation flow, and other parameters have little effect. If the measure- ment error of the former three parameters is controlled within 5% , and other parameters within 10% , the accura- cy of flow influence line method can be ensured. This conclusion can provide reference value for bridge hydrolog- ic survey to improve the calculation precision of flow influence line method and the economic benefit.