摘要
子汇水区域宽度在SWMM中是个敏感参数,取值的变化对管网水力分析的结果有较大影响。理想化模型中,对宽度的计算条件与实际工程遇到的情况差别较大,无法直接计算。现有的估算方法主要依靠经验,取值区间较大,对计算结果影响较大。实际地表漫流的路径复杂,难以确定子汇水区域内的地表漫流路径,宽度计算也变得不确定。要提高宽度的计算精度、减少不确定性,需要对子汇水区域的划分更精细,根据实测的数据校验宽度的取值。
Sub-catchment width in SWMM is a sensitive parameter value. Its change has great im-pact on hydraulic analysis of drainage system. The calculation premise of the width in ideal model is sodifferent from that in actual project practice that the value of width can not be obtained directly.Existingestimation methods rely mainly on experience values. The value range is so large that it has great impacton the calculation results. Because actual overland flow path is complex, it is difficult to determine the o-verland flow paths and therefore the calculation of the sub-catchment width becomes uncertain. To in-crease the calculation accuracy of the ,width and to reduce uncertainty, it is necessary to finely divide asub-catchment and to calibrate the value of the width according to the measured data.
出处
《中国给水排水》
CAS
CSCD
北大核心
2014年第22期61-64,共4页
China Water & Wastewater
