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| DOI：10.13522/j.cnki.ggps.2022199 |
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| Study on the Framework of Water Environment Treatment in the Suining Section of Qiongjiang River Basin |
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YANG Yongan, LIU Bing, YANG Juan, LONG Shuai, WANG Yuanming, LI Kefeng
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1. College of Environmental Science and Engineering, China West Normal University, Nanchong 637009, China;
2. Emergency Center for Ecological Environmental Safety of Suining, Suining 629000, China;
3. State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610065, China
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| Abstract: |
| The framework of water environment treatment is an effective way to cope with the running out of water resources and the deterioration of water quality. It also has important significance in the practice of river conservation. The Suining section of Qiongjiang River basin, a typical small watershed in China, was chosen as the research object in this study. On the basis of existing frameworks and measures for water quality, and according to the result of pollution receiving capacity from SWAT model, we proposed three main measures as a whole framework to guarantee the water quality, which includes improving the effluent standard of sewerage treatment plants, increasing the sewerage collection rate the reuse of effluent, improving the treatment methods and discharge channels of rural scattered domestic sewage. The water quality and pollution receiving capacity with and without the new framework proposed in this study were calculated and compared in three typical profiles. The result showed that the CODCr, NH3-N and TP could reach the standard of class Ⅲ in a whole year in typical profiles, and the river still had the pollution receiving capacity for CODCr, NH3-N and TP in the driest month. The result of this study can provide a scientific basis and technique support for the water environment conservation in Qiongjiang River basin. |
| Key words: Suining section of Qiongjiang River basin; SWAT model; framework of water environment treatment; pollution receiving capacity |
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