Hydrochemical characteristics and water quality evaluation of different water bodies in Zezhou section of Danhe River Basin
In order to study the hydrochemical characteristics and water quality status of different water bodies in Danhe River Basin,the hydrochemical characteristics of surface water,shallow groundwater,deep groundwater and spring water were analyzed by using various hydrochemical methods such as correlation analysis,Piter trilinear,chlor alkali index and the ratio of main cation and anion.The water quality was evaluated based on entropy weight fuzzy comprehensive evaluation method and Wilcox and USSL graphical methods.The results showed that:(1)The water bodies in the area were weakly alkaline;The concentrations of TDS and F-decreased gradually from top to bottom.(2)The hydrochemical types of surface water and shallow groundwater are mainly HCO3·SO4-Ca;The deep groundwater and spring water are mainly HCO3·SO4-Ca;In the process of surface water infiltration,cations tend to change from Ca-Na type to Ca type,and anions tend to change from SO4 type to HCO3 type.(3)The hydrochemical characteristics of the study area are mainly controlled by rock weathering;The hydrochemical components mainly come from the dissolution of silicate rocks,and there are also evaporation salt rock dissolution,carbonate rock dissolution and cation exchange.(4)The results of water quality evaluation show that 66.7％of shallow groundwater,100％of deep groundwater and spring water are suitable for human consumption;Some surface water has high risk of salt damage.The study clarified the hydrochemical characteristics and water quality status of different water bodies in the area,and the results can provide an effective basis for water resources development and protection.
hydrochemical characteristicswater quality evaluationentropy weight fuzzy comprehensive evaluation methodDanhe River
NETL
NSTL
万方数据
