基于分类树和雷达图的城市河道排污口溯源方法

Source Tracing Method of Urban River Sewage Outfall Based on Classification Tree and Radar Chart

为了解决城市河道排污口溯源问题,提出了分类树和雷达图结合的溯源方法。利用分类树判别流水类型来确定污染源进入雨水管道的大致范围,然后将该范围内的排水户与排污口进行水质雷达图相似性比对,即可排查出疑似污染源。将此方法应用在2个典型排污口的溯源中,结果表明:检测BOD5和表面活性剂可区分雨水管中的清洁水和污水,将减少溯源中的水质检测费用;疑似排水户中相似度最高的即为真实的污染源。此方法可同时溯源到雨污混错接点和污染源,为城市河道排污口溯源提供一定的借鉴。

To solve the problem of tracing pollution sources in urban river channels,a tracing method combining classification trees and radar charts is proposed.The method involves using a classification tree to determine the approximate range of pollution sources of drainage system by identifying the type of water flow.Then,the similarity between water quality radar charts of drainage households within the pollution range and the sewage outlets is compared,which helps identify suspected pollution sources.This method was applied to trace two typical sewage outlets,and the results showed that by detecting BOD 5 and surfactants,clean water and sewage in rainwater pipes can be distinguished,reducing the cost of water quality testing in the tracing process.The most similar drainage household within the suspected range is considered the actual pollution source.This method can simultaneously trace misconnection points and pollution sources,providing valuable insights for tracing pollution sources in urban river.