Analysis on the Lake Water Pollution Components Based on Normal Quality Monitoring Data

Take Hongze Lake of Jiangsu Province, China, as a Case, the components of lake water pollution were analyzed, based on the regular water quality monitoring data of 10 sampling points from 1990 to 2002 and the spatial data. By factor analysis and spatio-temporary correlation analysis etc, the spatio- temporary simulations to main lake water pollution components, including eutrophication, were carried out. The lake water pollution components were classified into two types, primary pollution component (PPC) and secondary pollution component (SPC). The living pollution, nitrogen pollution etc, belong to the former, and eutrophication, ion property etc, belong to the later. The equations of the pollution components were constructed, and inversely their seasonal and spatial changes were analyzed. Finally the relation of simulated eutrophication values with N:P was modeled in this paper, which was similar to general rule of shallow lakes. Results showed that a good combination of spatio- temporary study with factor analysis etc was very helpful for the classification, identification and modeling of water pollution components, and was favorable to evaluate water pollution and deeper study on the mechanism of Lake Eutrophication.