To study the chemical characteristics and control factors of surface water in the Xiaohe irrigation area,this study sampled and analyzed the surface water from October 2021 to August 2022,and combined correlation analysis,mathematical statistics,ion ratio,and other methods to analyze the hydro-chemical types and characteristics of ion sources in the study area.The results showed that HCO3-Na·Mg·Ca was the main hydro-chemical type,and the dominant ions were Mg2+ and HCO-3,accounting for 35.41%and 68.49%of cations and anions,respectively.The surface water was significantly affected by rock weathering,and the spatio-temporal variation of ion content was significant.Total dissolved solids content reached its highest value in February and June.Ca2+,Mg2+,and K+ were derived from silicate weathering,HCO-3 was derived from the carbonatite weathering,and the sources of Cl-,SO 2-4,and NO-3 were mainly affected by human activities.Thus,this study can provide a theoretical reference for water resource management and ecological restoration in agriculturally irrigated areas.
维普
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