scholarly journals Change of steam structure in the Nansi Lake Basin during the urbanization process since 1980s

2017 ◽  
Vol 29 (1) ◽  
pp. 135-142
Author(s):  
JIANG Yan ◽  
◽  
XUE Lifang ◽  
YU Hongxue ◽  
MENG Yaoyao
Keyword(s):  
Lake Basin ◽  
Nansi Lake ◽  
Urbanization Process ◽  
Nansi Lake Basin

scholarly journals Analysis of Nonpoint Source Pollution and Water Environmental Quality Variation Trends in the Nansi Lake Basin from 2002 to 2012

2015 ◽  
Vol 2015 ◽  
pp. 1-11 ◽  
Author(s):  
Weiliang Wang ◽  
Tiantian Ju ◽  
Wenping Dong ◽  
Xiaohui Liu ◽  
Chuanxi Yang ◽  
...  
Keyword(s):  
Water Pollution ◽  
Economic Development ◽  
Environmental Quality ◽  
Nonpoint Source Pollution ◽  
Nonpoint Source ◽  
Lake Basin ◽  
Class Iii ◽  
Nansi Lake ◽  
Nansi Lake Basin ◽  
Water Environmental Quality

Based on the data analysis of economic development and the water environmental quality from 2002 to 2012 in the Nansi Lake Basin in China, the correlation between economic development and the water environmental quality was researched. Analysis shows that the GDP of the Nansi Lake Basin had an average annual growth of 7.3% in 2012, and the COD andCODMnhad the average annual decrease of 7.69% and 6.79%, respectively, compared to 2002. Basin water environmental quality overall improved, reaching Class III of the “Environmental quality standards for surface water (GB3838-2002).” The pollution of the water environment was analyzed from three aspects: agricultural fertilizers and pesticides, livestock, and aquaculture. Results indicated that the water pollution of the Nansi Lake Basin mainly came from nonpoint source pollution, accounting for more than 80% of the overall pollution. The contributions of both agricultural fertilizers and pesticides account for more than 85% of the overall nonpoint source, followed by livestock and aquaculture. According to the water pollution characteristics of the Nansi Lake Basin, the basin pollution treatment strategy and prevention and treatment system were dissected, to solve the pollution problem of the Nansi Lake Basin.

Research on the Relationship between Economic Growth and Heavy Metals Pollution of Lake Sediments in Nansi Lake Basin

2015 ◽  
Vol 1092-1093 ◽  
pp. 1017-1020 ◽  
Author(s):  
Jie Zhong Wang ◽  
Li Yuan Yang ◽  
Yun Qian Wang ◽  
Bing Hua Wang
Keyword(s):  
Economic Growth ◽  
Heavy Metals ◽  
Lake Sediments ◽  
Lake Basin ◽  
Nansi Lake ◽  
Metals Pollution ◽  
Kriging Interpolation Method ◽  
Heavy Metals Pollution ◽  
Nansi Lake Basin ◽  
The Relationship

The Environment Kuznets Curve (EKC) hypothesis was applied to explore the relationship between economic growth and heavy metal pollution of lake sediments in Nansi Lake basin. The indicator of economic growth (IEG) was extracted from ten important economic indexes by the method of principal component analysis based on the data from 1978 to 2007. Some representative heavy metals including Hg, Cu, Br and Mn were chosen to analyze the level of heavy metals pollution in Nansi Lake basin. According to the previous research results that the deposition rate of Nansi Lake sediments was 3.5 mm/a, Kriging interpolation method was used to segment the 10.5cm core into 30 parts. The coupling results show that there is an inverted U-shaped curve between IEG and the element Br, half of an inverted U-shaped curve between IEG and Hg and Mn, and a N-shaped curve between IEG and Cu.

Changes of rainfall and its possible reasons in the Nansi Lake Basin, China

2015 ◽  
Vol 30 (4) ◽  
pp. 1099-1113 ◽  
Author(s):  
Dunxian She ◽  
Jun Xia ◽  
Longteng Zhu ◽  
Junmei Lü ◽  
Xiangdong Chen ◽  
...  
Keyword(s):  
Lake Basin ◽  
Nansi Lake ◽  
Nansi Lake Basin

scholarly journals The fuzzy comprehensive evaluation (FCE) and the principal component analysis (PCA) model simulation and its applications in water quality assessment of Nansi Lake Basin, China

2020 ◽  
Vol 26 (2) ◽  
pp. 200022-0 ◽  
Author(s):  
Shiguo Xu ◽  
Yixiao Cui ◽  
Chuanxi Yang ◽  
Shujing Wei ◽  
Wenping Dong ◽  
...  
Keyword(s):  
Water Quality ◽  
Principal Components ◽  
Lake Level ◽  
Comprehensive Evaluation ◽  
Principal Component ◽  
Fuzzy Comprehensive Evaluation ◽  
Lake Basin ◽  
Nansi Lake ◽  
Level I ◽  
Nansi Lake Basin

The Fuzzy Comprehensive Evaluation (FCE) and the Principal Component Analysis (PCA) were simulated to assess water quality of the Nansi Lake Basin, China. The membership functions were established via the Nor-Half Sinusoidal Distribution Method, and the weight was calculated via the Exceeding Standard Multiple Method. To enhance the efficiency of extracting principal pollutant, the eigenequation was solved through the Jacobi Method, and the principal components were extracted based on eigenvalue, contribution ratio, accumulating contribution ratio, principal component loading and score. Water quality classification based on “National Surface Water Environmental Quality Standards of China (GB3838-2002) was used to assess the water quality. Considering the difference of the temporal and spatial distribution in average, water quality of Level I was 28.9%, 28.1%, 25.1%, 25.6%, respectively in spring, summer, autumn, and winter, which suggested that water quality in spring and summer was better than in autumn and winter. The order of water quality was Zhaoyang Lake (Level I) > Nanyang Lake (Level I) > Dushan Lake (Level III) > Weishan Lake (Level III and IV). There were four extracted principal components that can replace the fourteen pollutant indexes for assessing water quality. According to the annual mean data of the 1st principal components, the most important pollutions were heavy metals, including As (0.933), Hg (0.931), Cd (0.929), Cr(VI) (0.926), Pb (0.925), and Cu (0.534). It is proved that the combined FCE-PCA model could provide valuable information in the water quality assessment for the Nansi Lake Basin.

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