潮白河顺义段再生水补给区包气带理化参数相关性分析

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

土壤阳离子交换容量(CEC)、总有机碳(TOC)、粘土矿物总量和粘粒含量是影响再生水入渗过程中污染物在包气带及地下水含水层介质中迁移转化的四项重要指标,是反映包气带对污染物吸附性及生物作用的主要参数。本文选取北京市潮白河顺义段再生水补给区包气带作为对象,对CEC、TOC、粘土矿物总量及粘粒含量4项指标进行了两两相关性分析及函数拟合。结果表明,上述四项指标的大小均与埋深无关,只与介质本身特性有关,且两两之间存在着显著的相关性,相关系数均大于0.8。

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.