الوصف

illustrate:
The direct drainage gully of the designed or renovated road is the indirect drainage gully, that is, the overflow gully.
 

This scheme changes the stormwater outlet from a traditional one water outlet to the current two water outlets, namely the overflow outlet (rainwater discharge outlet) and the seepage outlet; and the overflow water level elevation difference is 0.**0.5 meters.

 

When the rainwater flows into the overflow rainwater outlet, it first flows out from the infiltration outlet, and when the water level reaches the overflow water level, it flows out from the overflow outlet, completing the selection process of first infiltration and then discharge.