GUOXiao-chen,LIMeng,DUPeng-fei,et al.Comparison on Quantitative Evaluation Methods and Indexes of Rainfall Inflow and Infiltration[J].China Water & Wastewater,2022,38(11):133-138.
降雨入流入渗定量评价方法及指标的对比
- Title:
- Comparison on Quantitative Evaluation Methods and Indexes of Rainfall Inflow and Infiltration
- Keywords:
- sewage pipe network; inflow and infiltration; quantitative evaluation; drainage area; sewage pipeline length; reference flow rate in dry days
- 摘要:
- 降雨导致的入流入渗是城市污水管网普遍存在的问题，利用监测识别入流入渗严重区域并开展检测和诊治工作是排水管理的重要任务之一。目前相关研究中，对于场次降雨条件下监测点入流入渗总量的计算方法相对明确，但仍需要建立定量指标进行监测点间的对比。总结并建立了基于排水分区面积、污水管线长度和旱天基准流量的3个定量指标，并在案例区域进行应用，结果表明，不同指标对排水分区入流入渗严重程度的识别存在明显差异：利用单位面积和单位长度的计算结果具有较好的一致性，但所需基础资料较多；与旱天基准流量进行比较仅需要利用监测数据本身，但会受不同排水分区人口密度、用地类型等因素影响；不同指标的适用条件不同。
- Abstract:
- The inflow and infiltration caused by rainfall is a common problem in urban sewage pipe network. It is one of the important tasks of drainage management to identify the areas with serious inflow and infiltration problem by monitoring and to carry out the detection, diagnosis and treatment. At present, relevant studies indicate that the method for calculating the total volume of inflow and infiltration at monitoring points in a rainfall event is relatively clear. However, it is still necessary to establish quantitative indexes for comparison among monitoring points. Three quantitative indexes based on drainage area, sewage pipeline length and reference flow rate in dry days were summarized and established, and applied in the case area. The results showed that there were significant differences in the identification and judgment of different indexes on the severity of inflow and infiltration in drainage areas, the use of unit area and per unit length calculation results had good consistency, but they relied on more basic data. The method compared with reference flow rate in dry days only needed the monitoring data, but the results could be influenced by drainage partition factors such as population density and type of land use. The applicable conditions of different indexes were different.
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