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Article

Study on Total Control of Total Nitrogen in the Laizhou Bay

by 1,2, 3,4, 1,2,*, 3,4,* and 1,2
1
Key Laboratory of Physical Oceanography, Ministry of Education of China, Ocean University of China, Qingdao 266100, China
2
College of Oceanic and Atmospheric Sciences, Ocean University of China, Qingdao 266100, China
3
Key Laboratory of Marine Environment and Ecology, Ministry of Education of China, Ocean University of China, Qingdao 266100, China
4
College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China
*
Authors to whom correspondence should be addressed.
Academic Editor: José Morillo
Water 2021, 13(17), 2439; https://doi.org/10.3390/w13172439
Received: 10 August 2021 / Revised: 25 August 2021 / Accepted: 2 September 2021 / Published: 5 September 2021
(This article belongs to the Special Issue Pollution in Estuaries and Coastal Marine Waters)
Human activity imposes a stronger and increasing impact on the coastal environment by land-based discharge and run-off pollution inputs. Land-based total nitrogen (TN) pollution, as the main cause of eutrophication in the Laizhou Bay, China, should be controlled effectively. Based on a three-dimensional pollution transport model, 20 groups of allocation schemes were designed under the requirement that the allocations of three estuaries in the inner bay were adjusted properly, while the two estuaries in the outer bay, i.e., the Yellow River and the Jiehe River, were kept unchanged. The statistical results show that the area ratio of heavily polluted seawater to the entire Laizhou Bay reached the maximum (35.14%) when the load allocation of the Xiaoqinghe River accounted for a high proportion (65%), and the Yuhe River and the Jiaolaihe River accounted for 15% and 20%, respectively. Overall, the pollution levels of the Laizhou Bay were positively associated with the allocation of the Xiaoqinghe River. Reducing pollutant allocation in the Xiaoqinghe River contributed most to the improvement of the seawater quality of the entire Laizhou Bay, and it was followed by a reduction in the Yuhe River and the Jiaolaihe River. View Full-Text
Keywords: total control; land-based pollution; total nitrogen; numerical simulation; Laizhou Bay total control; land-based pollution; total nitrogen; numerical simulation; Laizhou Bay
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MDPI and ACS Style

Peng, H.; Geng, H.; Mao, X.; Shi, J.; Lv, X. Study on Total Control of Total Nitrogen in the Laizhou Bay. Water 2021, 13, 2439. https://doi.org/10.3390/w13172439

AMA Style

Peng H, Geng H, Mao X, Shi J, Lv X. Study on Total Control of Total Nitrogen in the Laizhou Bay. Water. 2021; 13(17):2439. https://doi.org/10.3390/w13172439

Chicago/Turabian Style

Peng, Haohong, Haoyi Geng, Xinyan Mao, Jie Shi, and Xianqing Lv. 2021. "Study on Total Control of Total Nitrogen in the Laizhou Bay" Water 13, no. 17: 2439. https://doi.org/10.3390/w13172439

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