Open AccessProvenances and Controlling Factors of Solutes in Surface Runoff in the Tarim River Basin, Northwest China
Author(s) -
Wang Jian,
Junli Xu,
Yongshan Li,
Wei Yan
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/821/1/012016
Subject(s) - surface runoff , weathering , hydrology (agriculture) , drainage basin , surface water , structural basin , tarim basin , water quality , geology , erosion , china , environmental science , tarim river , geochemistry , geomorphology , ecology , geography , environmental engineering , geotechnical engineering , cartography , archaeology , biology
Research addressing the spatial differences and evolution of river hydrochemistry can clarify the interaction between surface water-soluble substances and the environment, as well as reveal correlations between surface water quality and human activities. Here, by sampling surface runoff and taking regional geology as the background, we analyze the provenances and control factors of soluble substances in the Tarim River Basin. We found that: More than 80% of the soluble ions in surface water originated from rock weathering in the mountains. The Gibbs free energy between the ions showed that when the runoff flowed out of the mountain, the Ca 2+ and HCO 3 - were almost saturated. The major ion concentration rose synchronously with the runoff migration. These findings indicate that the solute of surface water mainly originated from mountainous areas. Soluble substances had difficulty entering the river channel by erosion of the scarce surface runoff.