SWMM模拟植草沟功能的参数敏感性分析

发布时间：2018-03-20 13:16

本文选题：SWMM　切入点：植草沟　出处：《中国给水排水》2016年09期 　论文类型：期刊论文

【摘要】：SWMM在中国城市雨洪管理研究中的应用日益广泛,但关于模型参数设置及其对模型运算结果的影响研究尚有不足。以植草沟为研究对象,采用实测数据,对SWMM中最大入渗率、最小入渗率、入渗衰减系数、表面糙率等4个参数的敏感性进行了研究,并对比分析了根据文献设置模型参数值和应用实测参数值进行模拟的结果。结果表明,采用实测参数的模拟结果要优于采用手册中建议的参数值的模拟结果,前者更接近实测值;4个参数中,土壤最大入渗率为最敏感参数,表面糙率为不敏感参数;有关土壤入渗的模型参数敏感度受到降雨强度的影响。因此,在应用SWMM模拟植草沟功能时需要考虑参数如何取值,对具有敏感性的参数应尽可能采用实测值。
[Abstract]:The application of SWMM in the study of urban rain flood management in China is more and more extensive, but the study on the model parameter setting and its influence on the result of model operation is still insufficient. The maximum infiltration rate in SWMM is studied by using the measured data and taking the grass planting ditch as the research object. The sensitivity of the four parameters, minimum infiltration rate, infiltration attenuation coefficient and surface roughness, is studied. The simulation results based on the model parameters and the measured parameters are compared and analyzed. The results show that, The simulation results of measured parameters are better than those of the parameters suggested in the manual, the former is closer to the measured values, the maximum infiltration rate of soil is the most sensitive parameter, the roughness of soil surface is insensitive parameter, the maximum infiltration rate of soil is the most sensitive parameter, and the surface roughness is insensitive. The sensitivity of model parameters related to soil infiltration is affected by rainfall intensity. Therefore, how to select parameters should be considered when SWMM is used to simulate grass planting and furrow function, and the actual values should be used as far as possible for sensitive parameters.
【作者单位】：北京林业大学森林培育和保护教育部重点验室;北京市水科学技术研究院;清华大学地球系统科学研究中心地球系统数值模拟教育部重点实验室;
【基金】：北京市科委项目(Z121100000312037) 教育部留学回国人员启动基金资助项目(652450) 国家林业局引进国际先进林业科学技术项目(2011473)
【分类号】：TU985.12;TV213.9

【参考文献】