Analysis and Evaluation for Pollution Source of Xiquanyan Reservoir Eutrophication

Various types of pollution source were evaluated in this paper through investigation and analysis in the watershed of Xiquanyan reservoir in recent years. Provide scientific and effective reference and technical support in preventing eutrophication of Xiquanyan reservoir and implementing protection and management decisions by government. Calculation and analysis showed the conclusions: Farmland non-point source is the main artificial controllable source of Xiquanyan reservoir eutrophication; Most index of water quality of Xiquanyan have met the II standard of Environmental Quality Standard for Surface Water GB3838-2002. TN, TP and COD_Mn are main pollutants of Xiquanyan reservoir and always exceeds standard of which average over standard is 1.65, 2.36 and 0.47 times, respectively. Average over standard of COD_Cr and BOD₅ is 0.26 and 0.05 times, respectively. Water quality is better generally.