Calculation of designed flood drainage flow rate has significant importance for water safety and effectively reduction of economic loss from water logging disaster in low-lying region.
圩区设计排涝流量的计算对圩区的水安全和有效减免涝灾经济损失有着重要意义。
The main methods for calculating designed flood are probable maximum precipitation and hydrologic frequency analysis.
设计洪水计算方法主要是可能最大降雨和水文频率法。
The designed discharge and designed flood level are determined by hydrological computation and main characteristic value of highway bridge is checked.
通过桥渡水文计算，确定了设防流量及设防水位，校核了大桥主要特征值；
Designed flood of reservoir is a typical flooding process under given engineering safety standard. The frequency of designed flood is regarded as hydrological risk.
水库设计洪水就是在给定工程安全标准情况下某个典型洪水过程，设计洪水的频率特征表现的就是其水文风险。
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.
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。
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