Hydrochemical characteristics of groundwater and its influencing factors in Dawu karst water source
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Abstract:
Karst aquifer medium is usually inhomogeneous, and hydrogeological parameters are hard to obtain. Using a multivariate statistical method, graphic method, ions ratio method combined with karst hydrogeological conditions is an important tool to study hydrogeo chemical evolution and its influencing factors. Atypical karst water source in North China was selected to examine its hydrochemical characteristics and its influencing factors using hydrog eochemical technologies and statistical methods. Along the groundwater flow path, the types of hydrochemistry were increasing year by year. In addition to the role of water and rock, Ca2+ , Cl- , Na+ and SO4 2- multisource domestic sewage, industrial wastewater and domestic garbage affect the hydrochemistry types. The detection of volatile org anic compounds ( VOCs) and the different recharging features of NO3 - , VOCs spatiotemporal indicated that the groundwater hydro chemistry is continuously affected by anthropogenic activities. The main processes influencing groundwater environment in the study ar ea were water-rock interaction, cation exchange and adsorption, lixiviation, and human activities, which can be interpreted by ion r atio, correlation analysis, factor analysis and wastewater sources of groundwater sampling points, dynamic variation processes of gro undwater chemistries and their influencing factors.
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