具体作法是在污水截流干管前设置截流井，截流干管的管径根据截流倍数确定，

Specifically practice set diameter interceptors, before intercepting pipe sewage pipe intercepting interception ratio is determined according to the dry sewage and rainwater into the sewage intercepting pipe, an increased amount of rain water exceeds the ability of intercepting the tube , together with part of the sewage and rainwater will diffuse well through the closure into the channel of the overflow weir, to produce water pollution

The specific practice is to set up the cut-off well before the sewage cut-off pipe, the pipe diameter of the cut-off pipe is determined according to the multiple of the cut-off, the dry season sewage and the initial rainwater into the sewage cut-off dry pipe, when the increase of the amount of rainwater exceeds the water transfer capacity of the cut-off dry pipe, part of the sewage and rainwater will be spread through the overflow pipe in the cut-off well into the river, pollution of the water body

The specific method is to set up a closure well in front of the wastewater closure main. The pipe diameter of the closure main is determined according to the closure multiple. During the dry season, the wastewater and initial rainwater enter the wastewater closure main. When the increase of the rainfall exceeds the water delivery capacity of the closure main, part of the wastewater and rainwater will overflow the overflow weir in the closure well and enter the river, causing pollution to the water body