Abstract
In 2017, 42 groundwater samples in the Jiaozuo area were collected and tested. The groundwater hydro-chemical characteristics and reasoning of the area were analyzed by using mathematical statistics, Piper three-line diagram and correlation of components methods. The groundwater quality in the study area were evaluated by using the method of fuzzy comprehensive evaluation method based on principal component analysis. The results show that the domination of groundwater is Ca2+ Mg2+, SO42− and HCO3. And the shallow groundwater hydrochemical type evolves from HCO3-Ca to HCO3·SO4-Ca·Mg, HCO3SO4Q-Ca·Mg, according to the direction of groundwater runoff. The chemical type of the deep groundwater is mainly HCO3·SO4-Ca·Mg type, local type is HCO3·SO4-Ca·Mg. The change of hydrochemical composition is mainly affected by weathering and leaching of carbonate, sulfate and rock salt. The fuzzy comprehensive evaluation results show that 61% and 75% of the shallow and deep groundwater quality in the study area meet the III water standards and above.
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