Water chemical formation mechanism and water quality analysis of Shichuan River under the influence of human activities

被引:0
作者
Wang, Xiaoyan [1 ]
Jiang, Canwen [1 ]
机构
[1] Weinan Normal Univ, Coll Environm & life Sci, Key Lab Ecol & Environm River Wetlands Shaanxi Pro, Weinan 714000, Shanxi, Peoples R China
基金
中国国家自然科学基金;
关键词
Hydrochemical mechanism; water quality; comprehensive assessment; surface water; Shichuan River Basin; HYDROCHEMICAL CHARACTERISTICS; GEOCHEMISTRY; CARBONATE; BASIN;
D O I
10.1080/02757540.2024.2370572
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
It is necessary to analyze the characteristics of the water environment and factors influencing the basin in order to determine its current ecological status. This study aims to investigate the chemical properties in the Shichuan River Basin using Gibbs diagram, Piper triangle diagram, correlation analysis, factor analysis, and main ion ratio method. The enhanced Nemerow comprehensive index method and fuzzy comprehensive evaluation method are employed for river water quality assessment. The findings reveal that runoff water has a weak alkaline nature with low salinity. The hydrochemical type of river water includes Ca2++Mg2++Na+-SO42-, Ca2++Mg2+-SO42-+Cl-+HCO3-, Ca2++Na+-SO42-+Cl-+HCO3-. Silicite and dolomite weathering are identified as primary influencing factors, while evaporite weathering also contributes to variations in chemical composition within the basin's waters. Ca2+, Mg2+, SO42- and HCO3- originate from carbonate rock and silicate rock weathering processes, whereas Na+, K+ and Cl-, are primarily derived from evaporite weathering influenced by domestic sewage and agricultural activities. Agricultural production practices along with discharge of domestic sewage have an impact on Na+, K+, Cl- and NO(3)(-)concentrations in aquatic systems. Water quality at all three monitoring sections falls under level IV classification. Phosphorus emerges as a key limiting factor for eutrophication within this basin's watersheds.
引用
收藏
页码:961 / 981
页数:21
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