HAN Jing-bo,YANG Mo-yuan,PAN Xing-yao,et al.Quantitative Evaluation of Multi-level Regulation Effect of Sponge City in Combined Drainage Zone[J].China Water & Wastewater,2020,36(19 19):95-101.
Quantitative Evaluation of Multi-level Regulation Effect of Sponge City in Combined Drainage Zone
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第36卷
Number:
19 19
Page:
95-101
Column:
Date of publication:
2020-10-01
- Keywords:
- sponge city; multi-level regulation; combined sewer overflow; volume capture ratio of annual runoff; InfoWorks ICM
- Abstract:
- Sponge city construction gradually emphasizes the concept of system governance, and its effect can be fully manifested through multi-level regulation measures. However, there is a lack of detailed quantitative evaluation research on multi-level regulation measures. A case study was carried out in a built-up combined drainage area in a sponge city pilot area of Beijing sub-center. A refined model of sponge city construction area based on InfoWorks ICM software was built, and the scenario simulation analysis was carried out. The effect of sponge city construction at different levels was quantitatively evaluated. Compared with the pre-sponge city, the volume capture ratio of annual runoff of source regulation, process control and terminal regulation schemes increased from 47.9% to 51.4%, 75.7% and 75.2% respectively, and those of the source-process and source-process-end combined control schemes reached 77.0% and 84.5%, respectively. When calculating volume capture ratio of annual runoff in the combined drainage zone, indirect overflow process of downstream reclaimed water plant should be considered to accurately evaluate the effect of sponge city construction. For the combined drainage zone, there were still 13 combined sewer overflow events per year after the implementation of the interception pipeline control project, and the source-process-end combined regulation could reduce the annual average overflow frequency and total overflow volume by 61.5% and 52.5%, respectively. Restricted by the treatment capacity of the reclaimed water plant, the impact of the multi-level regulation technical scheme on the overflow events of the downstream reclaimed water plant was very limited, and the annual average overflow frequency and total overflow volume only decreased by 6.2% and 3.8% respectively. Therefore, it was necessary to adopt a series of comprehensive means, such as construction of reclaimed water plant, to realize the construction target of sponge city at regional scale on the basis of multi-level sponge city construction of the drainage zone.
Last Update:
2020-10-01