The method was adapt broad crested weir theory derivation to calculation flood rate of discharge and conjecture design rate of discharge through field investigate information of bridge.
该计算方法是通过实地调查桥前水深等资料，采用严密的宽顶堰理论推导，求得洪水流量，进而推求设计流量。
2
It introduces a diagram method for design of flooddischarge trench utility section, which is more universal and vivid and can attain the goal of quick& optimized design.