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Analysis on the Characteristics of Marine Functional Change Impact on Water Quality in Dalian Dayao Bay
Gao Fan, Yuan Zhongjie, Tian Zhenping, Wang Bing, Yu Datao, Jiang Hengzhi
(National Marine Environmental Monitoring Center, Liaoning, Dalian 116023, China)
Abstract: According to 2004-2012 six routine water quality survey data of Dalian Dayao Bay, the impact characteristics of marine functional change (from the culture area into Port Area for shipping) on the water quality were analyzed. With Dayao Bay marine functional change, nitrogen pollution source has changed from single marine aquaculture pollution to land-based pollution based on composite pollution source, and pollutants have been converted from organic pollutants into heavy metals, suspended solids and petroleum. According to the changing characteristics of water pollution in this area, the “Control source mainly, Repair as auxiliary” prevention and control measures were put forward.
Key words: marine functional change; Dayao Bay; water quality; eutrophication
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