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选择JZ市老城区某区域为研究对象,建立排水管网Info Works CS模型,基于实际降雨事件数据,率定降雨径流模型参数,并对主要参数进行敏感度分析。结果表明,影响径流洪峰量的最敏感参数是Horton模型的稳渗率,不透水表层的固定径流系数次之,且初渗率和初期损失值的敏感度最小。研究成果可为城市排水管网模型建立及参数选择提供理论依据和技术支撑。
Select an area in the old city of JZ City as the research object, establish Info Works CS model of drainage network, based on the actual rainfall event data, rate rainfall runoff model parameters, and sensitivity analysis of the main parameters. The results show that the most sensitive parameter affecting the runoff peak flow is the steady infiltration rate of the Horton model, followed by the fixed runoff coefficient of the impermeable surface layer, and the sensitivity of the initial permeability rate and the initial loss value are the smallest. The research results can provide theoretical basis and technical support for the establishment of urban drainage network model and parameter selection.