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Total maximum allocated load calculation of nitrogen pollutants by linking a 3D biogeochemical-hydrodynamic model with a programming model in Bohai Sea

文献类型： 外文期刊

作者： Dai, Aiquan 1 ; Li, Keqiang 1 ; Ding, Dongsheng 3 ; Li, Yan; Liang, Shengkang 1 ; Li, Yanbin 1 ; Su, Ying 1 ; Wang, Xi 1 ;

作者机构： 1.Ocean Univ China, Coll Chem & Chem Engn, Qingdao 266100, Peoples R China

2.Ocean Univ China, Minist Educ, Key Lab Marine Chem Theory & Technol, Qingdao 266100, Peoples R China

3.Chinese Acad Fishery Sci, Yellow Sea Fisheries Res Inst, Qingdao 26607

关键词： Coastal pollution control;Total maximum allocated load;Nitrogen;Optimization-simulation method;Bohai Sea

期刊名称：CONTINENTAL SHELF RESEARCH （ 影响因子：2.391； 五年影响因子：2.879 ）

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收录情况： SCI

摘要： The equal percent removal (EPR) method, in which pollutant reduction ratio was set as the same in all administrative regions, failed to satisfy the requirement for water quality improvement in the Bohai Sea. Such requirement was imposed by the developed Coastal Pollution Total Load Control Management. The total maximum allocated load (TMAL) of nitrogen pollutants in the sea-sink source regions (SSRs) around the Bohai Rim, which is the maximum pollutant load of every outlet under the limitation of water quality criteria, was estimated by optimization-simulation method (OSM) combined with loop approximation calculation. In OSM, water quality is simulated using a water quality model and pollutant load is calculated with a programming model. The effect of changes in pollutant loads on TMAL was discussed. Results showed that the TMAL of nitrogen pollutants in 34 SSRs was 1.49 x 10(5) ton/year. The highest TMAL was observed in summer, whereas the lowest in winter. TMAL was also higher in the Bohai Strait and central Bohai Sea and lower in the inner area of the Liaodong Bay, Bohai Bay and Laizhou Bay. In loop approximation calculation, the TMAL obtained was considered satisfactory for water quality criteria as fluctuation of concentration response matrix with pollutant loads was eliminated. Results of numerical experiment further showed that water quality improved faster and were more evident under TMAL input than that when using the EPR method (C) 2015 Elsevier Ltd. All rights reserved.

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