Correlation analysis of physical and chemical parameters of unsaturated zone in reclaimed water utilization area in the Chaobai River near Shunyi

Soil cation exchange capacity(CEC),total organic carbon(TOC),clay minerals content and clay content are four key indicators affecting pollutants transfer and transform in unsaturated zone and groundwater aquifer medium while reclaimed water infiltrating,and are main parameters reflecting pollutants sorption and biological effect of unsaturated zone.The article examines the correlation between the four indicators of unsaturated zone in reclaimed water utilization area in the Chaobai River near Shunyi and function fitting.The results show that the four indicators have no relationship with unsaturated zone depth,but with its characteristics,and each two indicators have significant correlation with correlation coefficient over 0.8.