YANGHai-yan,HUANGMing-yang,ZHOUGuang-yu,et al.Design of Flood Control and Drainage Planning Scheme for Coastal Mountainous Cities Based on Watershed[J].China Water & Wastewater,2023,39(5):133-138.
Design of Flood Control and Drainage Planning Scheme for Coastal Mountainous Cities Based on Watershed
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第39卷
Number:
第5期
Page:
133-138
Column:
Date of publication:
2023-03-01
- Keywords:
- flood control and drainage planning; SWMM; coastal mountainous city; large-scale drainage system; runoff volume
- Abstract:
- In view of the frequent occurrence of waterlogging disasters and the lack of systematic planning for flood control and drainage in China, the three levels of flood control and drainage system from the whole to the local were summarized, the drainage capacity of Y district, S city, X province and its current drainage system and flood control and drainage planning scheme were analyzed under a variety of rain-flood-tide scenarios by using SWMM model, and the scientific rationality of the system was verified. Through 65 simulations and scheme adjustments, the optimal drainage scale of Y district was determined, and 6 pumping stations were reserved. When the most unfavorable 24-hour rainfall with 20-year return period encountered the 50-year return period flood and 50=year return period tide, the runoff with a total volume of 3 506×104 m3 was formed in Y district, of which the runoff with volume of 2 402×104 m3 was discharged to the outer river through the water system, the runoff with volume of 193×104 m3 was discharged to the outer river through the pumping station, and the runoff with volume of 911×104 m3 was absorbed by rivers and detention areas. Therefore, the risk of waterlogging in Y district was eliminated.
Last Update:
2023-03-01