LIUXin.Discussion on Drainage Calculation Methods of Small Watersheds in Southeast Coastal Cities[J].China Water & Wastewater,2024,40(8):80-86.
Discussion on Drainage Calculation Methods of Small Watersheds in Southeast Coastal Cities
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第40卷
Number:
第8期
Page:
80-86
Column:
Date of publication:
2024-04-17
- Keywords:
- drainage calculation; small urban watershed; southeast coastal city; water balance method; average exclusion method; river network hydrodynamic model method
- Abstract:
- This paper summarized the commonly-used drainage calculation methods in China, proposed a modified water balance method combined with regional characteristics, and compared the performance of each method quantitatively in typical regions to discuss its applicability, so as to solve the problems of few available drainage outlets and incompatibility between drainage flow and river flow capacity in small watersheds in southeast coastal cities. The average exclusion method was not suitable for urban drainage areas with low surface water region ratio. The river network hydrodynamic model method exhibited a higher accuracy, but this method highly relied on data acquisition and data volume. The modified water balance method considered the coordination between the pumping station flow and the river flow capacity, and significantly improved the calculation accuracy compared with the conventional water balance method. In addition, the calculation results were close to the river network hydrodynamic model method, and the calculation was relatively simple and showed good applicability. The results aim to provide reference for drainage calculation in similar small urban watersheds.
Last Update:
2024-04-17