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Article

Hydrochemical Characteristics of Groundwater at the Epicenter of the 2021 Biru M6.1 Earthquake in Central Tibet

National Institute of Natural Hazards, Ministry of Emergency Management of China, Beijing 100085, China
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Author to whom correspondence should be addressed.
Academic Editors: Guangcai Wang, Nam C. Woo and Rui Yan
Water 2021, 13(21), 3111; https://doi.org/10.3390/w13213111
Received: 1 October 2021 / Revised: 22 October 2021 / Accepted: 29 October 2021 / Published: 4 November 2021
(This article belongs to the Special Issue Earthquakes and Groundwater)
Groundwater is undoubtedly important for water security and eco-environmental protection, especially in areas that experience earthquakes. Analyzing the characteristics and variation of groundwater after an earthquake is significant to obtain a better understanding of the seismic risk and rational management of groundwater resources. This study investigated the hydrogeochemical characteristics of groundwater at the epicenter of the 2021 Biru M6.1 earthquake in central Tibet, southwest China, using 23 water samples. The results showed that: (1) the hydrochemical type, hydrogen and oxygen isotope ratios, and SiO2 concentrations of three hot spring water samples in the study area were significantly different from those of samples taken elsewhere, indicating that the hot spring water originates from deeper geothermal reservoirs and has undergone more distant migration and longer fractionation processes; (2) the geochemical characteristics of groundwater from some sampling sites in the epicentral area were apparently distinct from those of other shallow groundwater or surface water samples, suggesting that the groundwater environment in the epicentral area has been affected by the earthquake. Along with the macroscopic groundwater responses in the epicentral area after the earthquake, we investigated the influencing mechanisms of the earthquake on the regional groundwater environment. We conclude that a shorter distance from the epicenter to the seismogenic fault leads to a greater possibility of the generation of new fractures, which then induce macroscopic responses and chemical characteristic variations for groundwater. View Full-Text
Keywords: Biru M6.1 earthquake; hydrochemical characteristics; hydrogen and oxygen isotopes; groundwater response Biru M6.1 earthquake; hydrochemical characteristics; hydrogen and oxygen isotopes; groundwater response
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MDPI and ACS Style

Yang, P.; Sun, X.; Liu, D.; He, Z.; Li, Y. Hydrochemical Characteristics of Groundwater at the Epicenter of the 2021 Biru M6.1 Earthquake in Central Tibet. Water 2021, 13, 3111. https://doi.org/10.3390/w13213111

AMA Style

Yang P, Sun X, Liu D, He Z, Li Y. Hydrochemical Characteristics of Groundwater at the Epicenter of the 2021 Biru M6.1 Earthquake in Central Tibet. Water. 2021; 13(21):3111. https://doi.org/10.3390/w13213111

Chicago/Turabian Style

Yang, Pengtao, Xiaolong Sun, Dongying Liu, Zhongtai He, and Yongsheng Li. 2021. "Hydrochemical Characteristics of Groundwater at the Epicenter of the 2021 Biru M6.1 Earthquake in Central Tibet" Water 13, no. 21: 3111. https://doi.org/10.3390/w13213111

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