Abstract
Major ion and trace elements chemistry of fifty-eight water samples of southern part of Western Siberia (Russia) were analysed with a suite of statistical techniques (using R programming language), in an effort to explain the key processes affecting chemical composition of saline lakes. The database included data about well, river, and lake waters and groundwater. According to performed cluster analysis of chemical data, all lakes in the area can be divided in to 5 main groups and their chemical composition very similar to rivers and deep groundwater. Shallow groundwaters are more enriched in Ca2+ and Mg2+. Principal component analysis (PCA) identified four main principal components, with the first principal component (PC1) accounting for 44.3% and representing the process of salinization, and PC2 and PC3 (17.9 and 8.6% of total variance) controlled by water-rock interaction process of carbonates/sulphates precipitation and aluminosilicates formation.
Highlights
Drylands are inhabited by more than 2 000 million people and cover approximately 40 percent of the global land area [1]
The aim of this study is to examine and interpret the chemical composition of 58 samples of saline lakes, groundwater, cells and rivers located in a steppe area of Western
According to performed cluster analysis of chemical data, all lakes in the area can be divided in to 5 main groups: clear soda lakes with HCO3+CO3>50%, chloride lakes with high soda amount (HCO3+CO3 up to 30%) and pure chloride lakes with Cl-Na and (Cl) or SO4 ion dominance
Summary
Drylands are inhabited by more than 2 000 million people and cover approximately 40 percent of the global land area (excluding Greenland and Antarctica) [1]. More than 1400 million people live in drylands of Asia that is 42 percent of the region’s population [2]. The catchment basin of saline lakes in Western Siberia in some cases reaches 20 thousand km and often it includes a lot of industrial and technological industries. Being complex dynamic systems that closely interact with the surrounding geochemical environment in the territory of their catchment area, lakes accumulate a huge number of *. © The Authors, published by EDP Sciences.
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