港区雨水径流模型的建立及检验

针对港区的情况建立了港区雨水径流模型,包括了地表产流计算模块、地表汇流计算模块和管网汇流计算模块,其中地表产流采用霍顿下渗公式计算下渗量;地表汇流采用瞬时单位法计算;管网汇流模块采用运动波法求解.经长沙市港区的实测资料检验,证明该模型在港区小流域的雨洪分析中有较高的精度,洪峰流量和径流总量最大相对误差分别为2.8%、7.563%,最小相对误差分别为0.7%、0.408%.可用于港区雨水排水的径流模拟.该模型的建立可以为港区的雨水排水系统的设计、校核及管理提供科学依据.

The Establishment and Verification of Harbor Runoff Model

A harbor surface runoff model is set up,which consists of mainly three parts: the surface urban rainfall subsystem calculus,the overland flow subsystem calculus and storm-sewer flow subsystem calculus.By verification of observed data of Xianing-gang in Changsha,the model is proved to be of high accuracy.The maximum relative error of the peak flow and total flow is 2.8% and 7.563%,the minimum is 0.7% and 0.408%,which can also be used in runoff simulation of Harbor storm drainage system.This model can provide scientific background for drainage system design,check and management.