# 城市暴雨强度公式编制与分析研究Parameters Calculation and Study of Urban Rainstorm Intensity Formula

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In order to improve the urban flood control capacity and prevent urban waterlogging, typical and reliable rainfall data collected in recent years are analyzed to set up an urban rainstorm intensity formula in accordance with the practical situation and on which the calculation of a comparatively high standard storm intensity and design water flow is based. Taking Huangshan City as an example, the paper calculates the urban rainstorm frequency distribution model of p-III type parameters and establishes rain- storm formula method and frequency conversion in frequency and time. It demonstrates that the frequency distribution of urban rainstorm formula is a special case of p-III distribution when α = 1 or Cs = 2. The frequency distribution has a simple form, only two parameters. And then the frequency curve line technique is put forward, operating more convenient. According to the distribution trend of super quantitative series, piecewise line, frequency curve of the last balance coordination, etc., the frequency curve with higher precision, less error is more reasonable. Meanwhile, the adjustment and calculation of Cv and yearly multiple frequency conversion formula are mentioned, so as to evaluate and compare the corresponding advantages and disadvantages.

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