Water Quality Assessment in Dongting Lake of China (2002-2004)

摘要

According to Basic Analytical Methods of Environmental Quality Standards for Surface Water in China, GB3838-2002, we used the 2002-2004 monitoring data to evaluate and characterize water quality condition of Dongting Lake, based on the application of comprehensive index methods such as Nemerow Index and Huangpu River Organic Pollution Index. The main pollutants of Dongting Lake are total phosphorus (TP), total nitrogen (TN) and fecal coliform. The mean Huangpu River Organic Pollution Index is 0.27. In West and South Dongting Lake, the water pollution could be more serious during the drought water season, whereas during the normal water season in West Dongting Lake the water pollution is also bad. The water quality is generally better during the flood water season than those during the normal water season. The pollution condition of the main lake are not serious during 2002-2004, while in certain water areas heavy pollution condition may occur during the drought water season.