排水管渠运行状况的好坏直接影响城市水环境系统。雨水管渠混入大量污染物会使水生态恶化，有效排查雨水管渠中的污染源,是治理黑臭水体的最首要任务。

Operation of drainage pipeline system affects urban waterenvironment. Large quantities of waste flowing into rainwaterpipelines destroys aquatic ecological environment. Finding out thesource of pollution is first step of restoration for aquatic environ-ment.

雨污混接调查技术是测绘、物探、GIS、流体测量、水质测定、视频、声呐等多项技术的集成，最终为分流制改造提供详实依据。

Its investigative techniques include surveying , physical detection,GlS,flow measurement, quality test of water, CCTV or Sonarinspection.lts results provides a basis of project for improving thequality of pipeline operation.

雨污混接调查

INVESTIGATION OFILLICIT CONNECTIONSIN SEPARATE SYSTEM REGIONS