TEMPORAL VARIABILITY OF HYDRO-CHEMICAL CHARACTERISTICS AND WATER QUALITY ASSESSMENT OF COLLAPSE POND IN ZHUXIANZHUANG COAL MINING AREA, CHINA

摘要

In this study, Zhuxianzhuang coal mining collapse pond is taken as the research object, the water environmental quality in four seasons of the collapse pond has been analyzed and compared. By using the principal component analysis method, the improved fuzzy comprehensive evaluation method and the irrigation water evaluation method, the following conclusions are obtained: Two principal components are proposed by the principal component analysis, and the results show that the main water quality evaluation indexes are TDS, EC, TP, SO_4~(2-), Cl~- and Mg~(2+). The improved fuzzy comprehensive evaluation results show that the water quality of the collapse pond in summer and autumn is poor, mainly affected by anthropogenic activities, while it is good in spring and winter. The USSL and Wilcox charts show that the water body in the study area is suitable for farmland irrigation.