瞬时单位线计算地面径流峰值的探讨

To discuss calculating the peak of overland runoff with Nash unit line

工程设计中常采用固定时段计算设计洪水,洪峰从有限的计算时段上统计,存在一定误差.为控制成果精度,可按瞬时单位线上涨历时调整计算时段,计算的原固定时段点的地面径流调整前后不变.还提出了计算任意时刻地面径流的公式,可直接试算地面径流峰值,也可计算出非等距的地面径流过程.

In engineering design,the design flood is usually calculated in a fixed period of time.In order to control the accuracy of the results,the calculation period can be adjusted according to the rising time of the instantaneous unit line.A formula for calculating ground runoff at any time is presented,which can be used to calculate the peak value of ground runoff directly or to calculate the non-equidistant ground runoff process.