洪水流量泛指汛期洪水的流量。其中，可以分为平均流量和瞬时流量，强降雨短时平均流量可以更好的体现洪水的大小。汛期时洪水的流量开始逐渐增加，经过洪峰流量后又逐渐减少。
由于洪水冲向了曼谷南部的泰国海湾形，大潮又迫使洪水重新退回，使得洪水流量不断增大。
Even as floods were draining into the Gulf of Thailand on Bangkok's southern shores, high tides pushed back, amplifying the floods.
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。
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.
利用数学模型分别对9个洪水流量级进行了水库沿程水面线计算分析，每个流量级分有围垦堤和没有围垦堤两个方案。
Mathematical model is used to calculate and analyze water line in case of 9 kinds of flood flow levels respectively in reservoir.
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