全局敏感性分析在LID措施选择中的应用研究
发布时间：2019-02-17 11:09
【摘要】：提出了一种在特定区域的雨洪系统规划中利用全局敏感性分析优选LID措施的方法。采用EFAST法对研究区域的SWMM模型中8项水文参数进行全局敏感性分析,得到对径流总量最敏感的参数是不渗透面积百分比(%imperv)、最大入渗速率(MaxRate)、最小入渗速率(MinRate),对峰值流量最敏感的参数是不渗透面积百分比(%imperv)、不渗透面积的曼宁值(N-Imperv)、渗透面积中洼地蓄水深度(S-Perv)。通过分析敏感参数与水文机制及LID措施的内在联系,优选出透水铺装和植草沟分别作为控制径流总量和峰值流量的措施。将两项措施加入模型中,对比模拟计算结果可知,透水铺装对径流总量的削减效果优于植草沟,而植草沟则可更有效地降低雨洪的峰值流量,表明优选出的两种措施确实对各自的目标指标具有更好的控制效果。研究结果证明了敏感性分析方法对于LID措施的选择是一种有效的辅助决策技术手段。
[Abstract]:In this paper, a method of selecting LID measures by using global sensitivity analysis in rain flood system planning in a specific area is presented. The global sensitivity analysis of 8 hydrological parameters in the SWMM model of the studied area was carried out by using EFAST method. It was found that the most sensitive parameter to the total runoff was the% imperv), maximum infiltration rate (MaxRate), minimum infiltration rate (MinRate),. The most sensitive parameters to the peak flow are the percentage of impermeable area (N-Imperv) of% imperv), impermeable area and the depth of water storage (S-Perv) in the percolation area. Based on the analysis of the relationship between sensitive parameters and hydrological mechanism and LID measures, the permeable pavement and grass trench were selected as the measures to control the total runoff and the peak flow, respectively. By adding the two measures to the model and comparing the simulation results, it can be seen that the reduction effect of permeable paving on total runoff is better than that of planting grass trenches, and planting grass trenches can reduce the peak runoff of rain flood more effectively. The results show that the two measures have better control effect on each target index. The results show that the sensitivity analysis method is an effective method for the choice of LID measures.
【作者单位】： 北京工业大学建筑工程学院北京市水质科学与水环境恢复工程重点实验室;
【分类号】：TU992;TV213.9
本文编号：2425101
[Abstract]:In this paper, a method of selecting LID measures by using global sensitivity analysis in rain flood system planning in a specific area is presented. The global sensitivity analysis of 8 hydrological parameters in the SWMM model of the studied area was carried out by using EFAST method. It was found that the most sensitive parameter to the total runoff was the% imperv), maximum infiltration rate (MaxRate), minimum infiltration rate (MinRate),. The most sensitive parameters to the peak flow are the percentage of impermeable area (N-Imperv) of% imperv), impermeable area and the depth of water storage (S-Perv) in the percolation area. Based on the analysis of the relationship between sensitive parameters and hydrological mechanism and LID measures, the permeable pavement and grass trench were selected as the measures to control the total runoff and the peak flow, respectively. By adding the two measures to the model and comparing the simulation results, it can be seen that the reduction effect of permeable paving on total runoff is better than that of planting grass trenches, and planting grass trenches can reduce the peak runoff of rain flood more effectively. The results show that the two measures have better control effect on each target index. The results show that the sensitivity analysis method is an effective method for the choice of LID measures.
【作者单位】： 北京工业大学建筑工程学院北京市水质科学与水环境恢复工程重点实验室;
【分类号】：TU992;TV213.9
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