The Water Quality Improvement through Two Pollutant Load Allocation Methods in Gehu Lake, China
Publication: Journal of Environmental Engineering
Volume 147, Issue 12
Abstract
Due to many industrial and domestic pollution sources gathered around Gehu Lake and the lack of effective reduction measures, the ammonia nitrogen and total phosphorus in a large area of the lake exceed the standard. In order to control the amount of pollutants flowing into the lake, this paper selects two allocation methods to determine the load allocation of ammonia nitrogen and total phosphorus under the constraint of environmental capacity. The environmental fluid dynamics code model is used to verify the validity of the load allocation scenarios. The results showed that the concentrations of ammonia nitrogen and total phosphorus in Gehu Lake were lower by equal proportional allocation than by the contribution ratio allocation method. For ammonia nitrogen, the area exceeding the water quality standard is reduced more by the equal proportional allocation method (up to 100%). While for total phosphorus, the area exceeding the water quality standard is reduced more according to the contribution ratio allocation method (up to 96.3%). Considering that the two pollutants should be reduced simultaneously as much as possible, the equal proportional allocation method can be selected.
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Data Availability Statement
Some or all data, models, or codes that support the findings of this study are available from the corresponding author upon reasonable request. These include the following: the EFDC model input data for all allocation scenarios.
Acknowledgments
This research was funded by the Beijing Municipal Natural Science Foundation (No. 8154044), the Fundamental Research Funds for Beijing University of Civil Engineering and Architecture (No. X20067), the National Natural Science Foundation of China (No. 51708015), and the Major Science and Technology Program for Water Pollution Control and Treatment (No. 2017ZX07202-006). In addition, we thank the editors and the anonymous reviewers for their valuable comments and suggestions.
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Received: Jan 21, 2021
Accepted: Jul 25, 2021
Published online: Sep 16, 2021
Published in print: Dec 1, 2021
Discussion open until: Feb 16, 2022
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