Distribution, Sources and Water Quality Evaluation of the Riverine Solutes: A Case Study in the Lancangjiang River Basin, Tibetan Plateau.

ABSTRACT: To examine the chemical composition, potential sources of solutes, and water quality of Lancangjiang River, the concentrations of major ions (Ca2+, Mg2+, Na+, K+, HCO3-, SO42-, Cl- and NO3-) in 45 river water samples collected in July and August 2019 were determined. Ca2+ and HCO3- are the predominant ions in river water. The extremely low K+ and NO3- concentrations and the sparse population suggest that the anthropogenic inputs are limited. The Pearson correlation coefficients and the elemental ratios Ca2+/Na+ versus Mg2+/Na+, Ca2+/Na versus HCO3-/Na+, [Ca2+ + Mg2+]/[HCO3-] versus [SO42-]/[HCO3-] reveal the mixing processes of different sources; the chemical composition of the river water is controlled by the mixture of carbonate weathering, evaporite weathering and silicate weathering in

SUBMITTER: Liu J 

PROVIDER: S-EPMC6926977 | biostudies-literature | 2019 Nov

REPOSITORIES: biostudies-literature