DU Ying-en,HOU Jing-ming,MA Hong-li,et al.Spatial Pattern Optimization of LID Facility Based on SWMM[J].China Water & Wastewater,2021,37(19 19):120-125.
Spatial Pattern Optimization of LID Facility Based on SWMM
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第37卷
Number:
19 19
Page:
120-125
Column:
Date of publication:
2021-10-01
- Keywords:
- spatial pattern optimization of LID facilities; SWMM; total runoff control rate; reduction rate of rainwater runoff pollution load; numerical simulation
- Abstract:
- To investigate the influence of LID facilities spatial pattern on runoff control rate and rainwater runoff pollution load, an urban stormwater process model established by SWMM was used for numerical simulation in a rain garden. According to the different locations of the rain gardens at the upstream, midstream and downstream of the catchment surface, the optimization schemes were formulated, and the effects of different spatial patterns of the rain gardens on the runoff control and rainwater runoff pollution load reduction under different return periods were calculated. For the three schemes, the total runoff control rate was negatively related to the return periods of the design rainfall, and the rain garden located downstream had the best improvement effect on the total runoff control rate. Under different design rainfall return periods, different optimization schemes had certain regulation effect on the rainwater runoff pollution load, and the rain garden located downstream had the best purification effect on the rainwater runoff pollution load. In addition, the reductions of TSS and COD were better than those of NH3-N and TP in the rain garden as a whole.
Last Update:
2021-10-01