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Investigation and Evaluation of Reservoir Eutrophication in Chongqing City Zone

Jing Li

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Abstract

An investigation of the 6 large and medium sized reservoirs in Chongqing city zone was carried out and has revealed that concentration of chlorophyll-a, total P(TP), total N(TN), see chi disk depth and COD_(Mn) are ranged from 4.62～(36.40mg/m~3), 0.012～0.323mg/L, 0.005～5.94mg/L, 0.48～(1.95m), 1.24～7.03mg/L.There is significant correlation among the 3 methods. Evaluation with the methods of synthesis index of nutrition state, 1 of 5 reservoirs evaluated are hyper eutropher, 2 are light eutropher, 2 are mesotropher. The eutrophication of the reservoirs in Chongqing city zone is more and more serious.

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What this paper is about

An investigation of the 6 large and medium sized reservoirs in Chongqing city zone was carried out and has revealed that concentration of chlorophyll-a, total P(TP), total N(TN), see chi disk depth and COD_(Mn) are ranged from 4.62～(36.40mg/m~3), 0.012～0.323mg/L, 0.005～5.94mg/L, 0.48～(1.95m), 1.24～7.03mg/L.There is significant correlation among the 3 methods. Evaluation with the methods of synthesis index of nutrition state, 1 of 5 reservoirs evaluated are hyper eutropher, 2 are light eutropher, 2 are mesotropher. The eutrophication of the reservoirs in Chongqing city zone is more and more serious.

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Available abstract

An investigation of the 6 large and medium sized reservoirs in Chongqing city zone was carried out and has revealed that concentration of chlorophyll-a, total P(TP), total N(TN), see chi disk depth and COD_(Mn) are ranged from 4.62～(36.40mg/m~3), 0.012～0.323mg/L, 0.005～5.94mg/L, 0.48～(1.95m), 1.24～7.03mg/L.There is significant correlation among the 3 methods. Evaluation with the methods of synthesis index of nutrition state, 1 of 5 reservoirs evaluated are hyper eutropher, 2 are light eutropher, 2 are mesotropher. The eutrophication of the reservoirs in Chongqing city zone is more and more serious.

Key concepts: Eutrophication, Environmental science, Chlorophyll a, Chlorophyll, Positive correlation, Hydrology (agriculture), Environmental chemistry, Animal science

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