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雨水管网设计计算十分繁琐,一般需要根据暴雨强度计算公式计算出不同降雨持续时间的暴雨量,绘制成暴雨量曲线图(即φq—t 曲线图),然后列表由第一段管道起分管段逐段计算。先计算设计降雨历时与汇水面积,由设计降雨历时查暴雨量曲线图求出单位面积迳流量,再由汇水面积计算该管段的流量,根据流量再计算(或查表)求出
Rainwater pipe network design calculation is very tedious, generally need to calculate the rainfall intensity of different rainfall duration according to the formula of rainstorm intensity, draw a storm rainfall curve (ie, φq-t curve), and then the list starts from the first segment of the pipeline. Segment calculations. Calculate the design rainfall duration and catchment area first, calculate the flow rate per unit area by designing the rainfall rainfall duration graph, and calculate the flow rate of the pipe section from the catchment area, and calculate the flow rate according to the flow recalculation (or look-up table).