urban drainage layout

Orthogonal
It is a form in which the main pipes of each drainage basin are arranged in the direction perpendicular to the water body at the shortest distance, and it is suitable for areas where the terrain is inclined to the water body.

interception
It is an arrangement in which the main pipes are laid along the low side, and the sewage from each main pipe is intercepted and sent to the sewage treatment plant.

parallel
It is to avoid the excessive flow velocity in the pipe due to the large slope of the main pipe, causing the pipeline to be severely washed or having too many water drop wells, so that the main pipe is basically parallel to the contour line and the river, and the main pipe is inclined to the contour and the river. The layout form of corner laying is suitable for areas where the terrain is relatively inclined to the direction of the river.

partition
It is to lay independent pipeline systems in the high area and the low area respectively. The sewage in the high area flows directly into the sewage treatment plant by gravity flow, and the sewage in the low area is pumped to the main pipe or sewage treatment plant in the high area.

radial
When the topography of the central part of the town is high and inclined to the surroundings, and there are multiple drainage outlets around, the trunk pipes of each drainage basin are often arranged in a radial manner. This arrangement has the advantages of short main pipe length, small pipe diameter, shallow pipe burial depth, and convenient sewage irrigation.

wraparound
It is an arrangement in which the main pipes are arranged along the surrounding, and the sewage from each main pipe is intercepted and sent to the sewage treatment plant for centralized treatment.