Exploration and application of hydrochemical characteristics method for quantification of pollution sources in the Danjiangkou Reservoir area

Abstract The quantification of point source (PS) pollution and non-point source (NPS) pollution in different regions is needed so that targeted management strategies for water environment managers can be prepared. The aim of this study was to establish a method for quantifying PS and NPS pollution by measuring ion concentrations. The Danjiangkou Reservoir and its main tributaries were selected as the study area. The spatiotemporal variation in the concentration of nutrients and ions was analyzed. The results showed that the main ions did not display any distinct spatiotemporal variations on the reservoir, but spatiotemporal variations were evident in the tributaries: Mg2+, Na+, SO42− and Cl− were lowest in the wet season, K+ was highest in the dry-to-wet transition season, and Si was highest in the wet season. We selected Cl−/TN, SO42−/TN, and Na+/TN as PS pollution tracking indicators and K+/TN, Ca2+/TN, and Si/TN as NPS pollution tracking indicators. The mean contribution rate of NPS pollution calculated using Cl−/TN, Na+/TN, and Si/TN, and by the isotope approach, had a significant linear relationship (p

• Publication year

  2020

• Venue

  Journal of Hydrology

• Publication date

  2020-11-01

• Fields of study

  Environmental Science

• Identifiers
  DOI 10.1016/j.jhydrol.2020.125291
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar

• No claims are published for this paper.

• No concepts are published for this paper.

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