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Article

A Characterization of the Hydrochemistry and Main Controlling Factors of Lakes in the Badain Jaran Desert, China

by 1,2, 1,*, 1 and 1,2
1
Key Laboratory of Ecohydrology of Inland River Basin, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences (CAS)/Alxa Desert Eco-Hydrological Experimental Research Station, Lanzhou 730000, China
2
University of Chinese Academy of Sciences, Beijing 100049, China
*
Author to whom correspondence should be addressed.
Academic Editor: Elias Dimitriou
Water 2021, 13(20), 2931; https://doi.org/10.3390/w13202931
Received: 13 September 2021 / Revised: 8 October 2021 / Accepted: 17 October 2021 / Published: 19 October 2021
(This article belongs to the Special Issue Soil Hydrological Processes in Desert Regions)
Badain Jaran Desert, the coexistence of dunes and lakes, and the presence of the world’s tallest dunes, has attracted worldwide attention among hydrologists. Freshwater, brackish, and saline lakes coexistence in the Badain Jaran Desert under extremely arid environmental conditions. This raises the question of why diverse lake water types exist under the same climatic conditions. Answering this question requires the characterization of lake hydrochemistry and the main controlling factors. The purpose of the presented research was to systematically analyzed samples from 80 lakes using statistical analysis, correlation analysis and hydrogeochemical methods to investigate the hydrochemical status and evolution of lakes in the Badain Jaran Desert. The results showed that the lake water in Badain Jaran Desert is generally alkaline, with the average pH and TDS were 9.31 and 165.12 g L−1, respectively. The main cations to be Na+ and K+, whereas the main anions are Cl and SO42−. HCO3 and CO32− decreased and SO42− and Cl increased from southeast to northwest, whereas lake hydrochemistry changed from the SO42−-Cl-HCO3 type to the SO42−-Cl type and lakes transitioned from freshwater to saline. The freshwater and slightly brackish lakes are mainly distributed in the piedmont area at a high altitude near the Yabulai Moutains, whereas saline lakes are mainly distributed in the desert hinterland at a low altitude, and there is a roughly increasing trend of ions from the Yabulai Mountains. The evaporation-crystallization reactions are the dominant in the study region. Moreover, some saline mineral deposits, are extensive in these regions caused by intense evaporation-crystallization. View Full-Text
Keywords: hydrochemical characteristics; ion exchange; evaporation-crystallization; controlling factors; Badain Jaran Desert hydrochemical characteristics; ion exchange; evaporation-crystallization; controlling factors; Badain Jaran Desert
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MDPI and ACS Style

Jia, B.; Si, J.; Xi, H.; Qin, J. A Characterization of the Hydrochemistry and Main Controlling Factors of Lakes in the Badain Jaran Desert, China. Water 2021, 13, 2931. https://doi.org/10.3390/w13202931

AMA Style

Jia B, Si J, Xi H, Qin J. A Characterization of the Hydrochemistry and Main Controlling Factors of Lakes in the Badain Jaran Desert, China. Water. 2021; 13(20):2931. https://doi.org/10.3390/w13202931

Chicago/Turabian Style

Jia, Bing, Jianhua Si, Haiyang Xi, and Jie Qin. 2021. "A Characterization of the Hydrochemistry and Main Controlling Factors of Lakes in the Badain Jaran Desert, China" Water 13, no. 20: 2931. https://doi.org/10.3390/w13202931

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