WANG Qiu-ping,GUO Shuai,CHEN Guo-fen,et al.Experiment on Intercepted Flow Rate of Street Storm Sewer Inlets[J].China Water & Wastewater,2021,37(17 17):115.
Experiment on Intercepted Flow Rate of Street Storm Sewer Inlets
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第37卷
Number:
17 17
Page:
115
Column:
Date of publication:
2021-09-01
- Keywords:
- road runoff; street storm sewer inlet; hydraulic model; road slope
- Abstract:
- The street storm sewer inlet is the entrance of the road runoff into the underground drainage pipe and is a key component of the municipal drainage system. A 1 ∶1 model device (length of 12 m and width of 3 m) was constructed to investigate the performance of the street storm sewer inlet. The effects of cross slope (1%-2%), longitudinal slope (0.5%-5%), and runoff flow rate (0-70 m3/h) on the flow patterns and intercepted flow rate were analyzed by the national standard deviated gully drainage test in a road with a continuous slope. The increase of the cross slope increased both the side and front intercepted flow rates of the storm sewer inlet, so the discharge flow rate of the storm sewer inlet increased accordingly. However, when the cross slope was larger than 1.5%, the increase of the intercepted flow rate became smaller. The longitudinal slope of the road only changed the velocity of the runoff without altering the direction of the runoff, and its influence on the width of the runoff and discharge flow rate was smaller than that of the cross slope of the road. The actual measured intercepted flow rate was less than the designed discharge flow rate. The actual intercepted flow rate curve of the storm sewer inlet was in line with the ideal intercepted flow rate line only when the rainfall was small and the road runoff was less than 10 m3/h.
Last Update:
2021-09-01