Estimation of contribution ratios of pollutant sources to a specific section based on an enhanced water quality model

Environmental Science and Pollution Research International
Bibo CaoYuqiu Wang

Abstract

Because water quality monitoring sections or sites could reflect the water quality status of rivers, surface water quality management based on water quality monitoring sections or sites would be effective. For the purpose of improving water quality of rivers, quantifying the contribution ratios of pollutant resources to a specific section is necessary. Because physical and chemical processes of nutrient pollutants are complex in water bodies, it is difficult to quantitatively compute the contribution ratios. However, water quality models have proved to be effective tools to estimate surface water quality. In this project, an enhanced QUAL2Kw model with an added module was applied to the Xin'anjiang Watershed, to obtain water quality information along the river and to assess the contribution ratios of each pollutant source to a certain section (the Jiekou state-controlled section). Model validation indicated that the results were reliable. Then, contribution ratios were analyzed through the added module. Results show that among the pollutant sources, the Lianjiang tributary contributes the largest part of total nitrogen (50.43%), total phosphorus (45.60%), ammonia nitrogen (32.90%), nitrate (nitrite + nitrate) nitrogen (47.73%),...Continue Reading

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Citations

Sep 18, 2016·Environmental Science and Pollution Research International·Hidemichi FujiiMakoto Kagabu
Feb 2, 2020·Environmental Science and Pollution Research International·Gelin KangYuqiu Wang

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