title: Analysis of point source pollution and water environmental quality variation trends in the Nansi Lake basin from 2002 to 2012.
abstract: Based on the data analysis of the water environmental quality and economic development from 2002 to 2012 in the Nansi Lake basin, the correlation and change between the water environmental quality and economic development were studied. Results showed that the GDP and wastewater emissions of point source in the Nansi Lake basin had an average annual growth of 7.30 and 7.68 %, respectively, from 2002 to 2012. The emissions of chemical oxygen demand (COD) and ammonia nitrogen (NH3-N) had the average annual decrease of 7.69 and 6.79 % in 2012, respectively, compared to 2002. Basin water quality overall improved, reaching the Class III of the "Environmental quality standards for surface water (GB3838-2002)," in which the main reason was that sewage treatment rate increased gradually and was above 90 % in 2012 (an increase of 10 % compared to 2002) with the progress of pollution abatement technology and the implementation of relevant policies and regulations. The contribution of water environmental pollution was analyzed from related cities (Ji'ning, Zaozhuang, Heze). Results indicated that Ji'ning had the largest contribution to water pollution of the Nansi Lake basin, and the pollutant from domestic sources accounted for a higher percentage compared to industrial sources. The wastewater, COD, and NH3-N mainly came from mining and washing of coal, manufacture of raw chemical materials and chemical products, papermaking industry, and food processing industry. According to the water pollution characteristics of the Nansi Lake basin, the basin pollution treatment strategy and prevention and treatment system were dissected to provide a scientific basis for prevention and control of lakeside point source pollution along the Nansi Lake.
authors.affiliation: College of geography and environment, Shandong Normal University, Wenhuadong Rd 88, Lixia District, Ji'nan, 250014, People's Republic of China. sunboyhood@163.com.
authors.forename: Weiliang
authors.initials: W
authors.lastname: Wang
authors.affiliation: College of geography and environment, Shandong Normal University, Wenhuadong Rd 88, Lixia District, Ji'nan, 250014, People's Republic of China.
authors.forename: Xiaohui
authors.initials: X
authors.lastname: Liu
authors.affiliation: College of geography and environment, Shandong Normal University, Wenhuadong Rd 88, Lixia District, Ji'nan, 250014, People's Republic of China.
authors.forename: Yufan
authors.initials: Y
authors.lastname: Wang
authors.affiliation: Engineering and Technology Centre of Lake, State Environmental Protection Scientific Observation and Research Station for Lake Dongtinghu (SEPSORSLD), Research Centre of Lake Environment, State Environmental Protection Key Laboratory for Lake Pollution Control, State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, 8#, Dayangfang, Anwai Street, Beijing, 100012, People's Republic of China.
authors.forename: Xiaochun
authors.initials: X
authors.lastname: Guo
authors.affiliation: Engineering and Technology Centre of Lake, State Environmental Protection Scientific Observation and Research Station for Lake Dongtinghu (SEPSORSLD), Research Centre of Lake Environment, State Environmental Protection Key Laboratory for Lake Pollution Control, State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, 8#, Dayangfang, Anwai Street, Beijing, 100012, People's Republic of China. lushy2000@163.com.
authors.forename: Shaoyong
authors.initials: S
authors.lastname: Lu
mesh_terms: D000641:Ammonia / Q000032:analysis*; D057919:Biological Oxygen Demand Analysis; D002681:China; D004784:Environmental Monitoring / Q000379:methods*; D060106:Lakes / Q000737:chemistry*; D009584:Nitrogen / Q000032:analysis*; D014874:Water Pollutants, Chemical / Q000032:analysis*; D060753:Water Quality
chemical_list: D014874:Water Pollutants, Chemical; D000641:Ammonia; D009584:Nitrogen
keywords: Economy; Nansi Lake; Point source pollution; Relativity; Water environmental quality