RESOURCES AND ENVIRONMENT IN THE YANGTZE BASIN >> 2008, Vol. 17 >> Issue (2): 275-275.

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QUANTITATIVE STUDY ON THE INFLUENCE OF LAKE TAIHU'S MAIN ZONE UPON MEILIANG BAY

WANG Fang   

  • Received:1900-01-01 Revised:1900-01-01 Online:2008-03-20

Abstract:

The Meiliang bay is suffered from eutrophication problem.Considering the unique geographical position of Meiliang Bay at Lake Taihu，both fixed and validated twodimension water quality model and alga growing model were used to simulate the effect on nutrition and algae concentration in Meiliang Bay by main zone of Lake Taihu under southeast and northwest wind.The simulated results showed as follow: in August，2001，the average concentration of algae of Meiliang bay was 43.18 mg/m3.At the same time，the average concentration of nitrogen and phosphorus were 2.48 and 0.248 mg/L.If the parameter of flow index induced by southeast wind was added to these models，the concentration of algae，nitrogen and phosphorous were obtained to be 41.92 mg/m3，2.07 mg/L and 0.231 mg/L and 42.55 mg/m3，2.19 mg/L，0232 mg/L respectively under the influence of northwest wind effect.Considering both the influence of flow and excursion caused by southeast wind，the concentration of algae，nitrogen and phosphorous changed to be 53.86 mg/m3，2.06 mg/L and 0.229 mg/L and 50.71 mg/m3，2.17 mg/L，0.233 mg/L when wind direction transferred to northwest.The results indicated that the concentration of nitrogen and phosphorus in Meiliang Bay were affected by the flow of Lake Taihu to a certain extent and the change of alga in Meiliang Bay was mainly caused by the excursion of algae.The results agreed with the observation data very well and were considered to provide some supports for dealing with eutrophication of Lake Taihu.

Key words: eutrophication, Lake Taihu, water quality mode, algae growth model, quantitative influence

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