There are three types of rainwater collection traps, flat type, vertical type , and the combined type. The flat type water circulation, but easily blocked by debris, affecting the ability to close water, easy to block, but the edge of the drainage channel needs to maintain a certain depth of water, combined with the advantages of taking advantage of the combined type, should be preferred.
The following factors should be considered in the layout of rainwater collection traps in urban drainage systems:
1. The arrangement of rainwater collection traps in urban drainage ditch systems should be based on the topography and catchment area, combined with the longitudinal design of urban roads, and the rainwater collection openings should be located at low elevations.
2. For low-lying and reclamation sections, the area of stormwater runoff is large, and the runoff is large. To increase the speed of water collection, it is necessary to appropriately increase the number of rainwater outlets. It is best to use linear drains and wells for continuous drainage.
3. For the larger sections of urban roads with longitudinal slopes, especially the approach roads passing through the overpass, rainwater collection ports should be used. In the upper reaches, rainwater collection ports should be arranged so that the runoff rainwater can be collected from the upper reaches of the urban drainage ditch pipeline. Avoid sinking water into the downstream or under the bridge.
4. In order to improve the water collection effect of the drainage system, it is preferable to use a road gutter drainage ditch so that the curbstone drains on both sides of the road can also be drained.
5. Set water collection wells below the rainwater collection port to avoid sediment and debris from entering the pipeline.