Case study of the temporal and spatial changes in Lake Luoma's water quality using multivariate analysis

摘要

This paper investigates the hydrochemical setting of Lake Luoma to detect temporal and spatial trends. Physical, organic and nutritional parameters were the main variables to be evaluated. It was found that pH and BOD were almost the same in Suqian and Xuzhou. DO gradually declines in Suqian but increases in Xuzhou. The cluster analysis showed that it could be divided into 3 classes: April and October, January and February, and all other months. This is mainly related to the flood period including mean-flow period, low-flow period and high-flow period. The extensive investigation found that the core water quality parameters of COD_(Mn), BOD_5, Se, Cr~(6+), VP, S and FE were significantly different between the two monitoring stations.