潜水河雨后地表径流由地表下潜水、雨水地面上径流、雨水风化层径流构成，三部分水均随河道流量的增减而增减。
Stormflow consists of phreatic water, surface runoff and weather horizon-passing rain. The rise and drop of their discharge are consistent with that of the river discharge after rain.
城市雨水地表径流模型的目的是推求城市雨水地表径流的流量过程线，从而模拟雨水的地表径流过程。
The purpose of the city storm surface runoff model is to draw the surf ace runoff hydrograph and simulate the process of storm runoff.
由瞬时单位线推求S曲线和时段单位线，可以得到城市雨水口径流的流量过程线。
S curve, time unit hydro graph and surface runoff hydrograph can be gotten through instantaneous unit hydrograph.
目前，我国采用单一地表的平均径流系数计算雨水管渠的设计洪峰流量，这虽然使计算简化，但不尽合理。
The designed flood peak flow in storm sewer is usually calculated by adopting a constant average runoff coefficient at present in China, simple as it is, it's not reasonable enough.
目前，我国采用单一地表的平均径流系数计算雨水管渠的设计洪峰流量，这虽然使计算简化，但不尽合理。
The designed flood peak flow in storm sewer is usually calculated by adopting a constant average runoff coefficient at present in China, simple as it is, it's not reasonable enough.
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