Temporal and Spatial Distribution Characteristics of Water Quality in Hongya Section of the Qingyi River

Abstract

Eleven parameters such as pH, dissolved oxygen (DO), permanganate index (COD Mn ), ammonia nitrogen (NH 3 -N), total phosphorus (TP), total nitrogen (TN), fluoride(F -), cadmium (Cd), lead (Pb), petroleum and fecal coliform were selected to analyze the main pollution factors and the temporal and spatial distribution characteristics of Hongya Section of the Qingyi River by principal component analysis (PCA) and SPSS software, which based on water monitoring data in the year of 2011, 2013 and 2015. Four principal components were verified through PCA, and the result showed that the change of water quality is the trend of year-on-year deterioration in 2011, 2013 and 2015.The water quality in other seasons was better than that in autumn the water quality in Guidufu Section was better than it was in Muchengzhen Section. 156