摘要
以湖南省某市一排水流域为例,基于InfoWorksICM模型软件探讨了排水系统主要参数对洪峰及径流总量影响的灵敏度,讨论了在不同的区域尺度及不同的降雨下,参数灵敏度的变化情况。研究发现,径流系数为最敏感参数,其次是地面曼宁N与特征宽度。初期损失值的灵敏度受到降雨的影响较大。地面曼宁N、管道长度的灵敏度与区域尺度密切相关。总体而言各种区域尺度下水文参数较水力参数更为敏感,在建模以及校核时应当优先注意。
This study discusses the sensitivity of main parameters of urban stormwater drainage system based on InfoWorks model. The variations of sensitivity with different model scales and precipitations are considered. An urban catchment of a city in Hunan Province is chosen as the study area. The results show that runoff-coefficient is the most sensitive parameter, next is the catchment Manning roughness and catchment width. Sensitivity of initial loss is influenced by rainfall characteristics, while sensitivity of catch- ment Manning roughness and pipe length is related to model scale. In general, the hydrologic parameters are more sensitive than the hydraulic parameters. This should be noted during the model building and calibration process.
出处
《中国农村水利水电》
北大核心
2016年第7期75-78,共4页
China Rural Water and Hydropower
