城市暴雨强度公式理论频率分布曲线对比分析  

Comparative Analysis of the Theoretic Frequency Distribution Curves for Urban Rainstorm Intensity Formula

作　　者：谢予婕 李树平[1] 梁怿祯 Xie Yujie;Li Shuping;Liang Yizheng(College of Environmental Science and Engineering,Tongji University,Shanghai 200092,Chin)

机构地区：[1]同济大学环境科学与工程学院,上海200092

出　　处：《净水技术》2018年第7期103-107,共5页Water Purification Technology

摘　　要：暴雨强度公式是城市雨水系统设计的重要依据。目前推求城市暴雨强度公式的主要差异来自暴雨样本选取方法和理论频率曲线类型的选择。结合现有华中某市30年的降雨资料,分别使用皮尔逊Ⅲ型分布曲线、指数分布曲线和耿贝尔分布曲线拟合,分析曲线拟合精度。结果表明对于华中某市而言,皮尔逊Ⅲ型曲线在使用中拟合精度最高,并验证我国降雨更适用皮尔逊Ⅲ型曲线这一观点。Rainstorm intensity formula is an important design basis for urban rainwater system. The main differences of the calculation process of rainstorm intensity formula are how to sample the rainstorm and which type of theoretic frequency curve to choose. Based on 30 years of rainfall data in a city in Central China, Pearson type Ⅲ distribution curve, Exponential distribution curve and Gumbel distribution curve are respectively used. Comparing the fitting precision, Pearson type Ⅲ distribution curve turns out to be the best in the use of the rainfall in the city in Central China,and to be the best in the use of rainfall nationwide.

关 键 词：暴雨强度公式 频率分布曲线 皮尔逊Ⅲ型曲线 指数曲线 耿贝尔曲线 

分 类 号：TU991[建筑科学—市政工程]