PMID- 33906040
OWN - NLM
STAT- MEDLINE
DCOM- 20210714
LR  - 20210714
IS  - 1873-6424 (Electronic)
IS  - 0269-7491 (Linking)
VI  - 284
DP  - 2021 Sep 1
TI  - Hydrochemical changes of a spring due to the May 30, 2014 Ms 6.1 Yingjiang 
      earthquake, southwest China.
PG  - 117125
LID - S0269-7491(21)00707-7 [pii]
LID - 10.1016/j.envpol.2021.117125 [doi]
AB  - Groundwater chemistry can be affected by and related to earthquakes, thus it is 
      crucial to understand the hydrochemical changes and associated processes caused 
      by earthquakes for post-seismic groundwater utilization. Here we reported the 
      major ion concentrations changes of the Ganze Spring in response to the May 30, 
      2014 Ms 6.1 Yingjiang earthquake, southwest China based on the daily time series 
      (from 1st January 2012 to 20th July 2014) of Ca(2+), Mg(2+) and HCO(3)(-) 
      concentrations, as well as data of bulk strain and Peak Ground Velocity (PGV) 
      recorded at a nearby station. The results showed that the entire hydrochemical 
      response process can be divided into two stages after the earthquake occurred: 
      1). decline stage which was characterized by an increasingly decline of the three 
      ion concentrations, indicating a gradually significant dilution effect. At first, 
      the relationship of molar concentrations of ions showed no obvious changes; but 
      later as the rate of decrease in ion concentrations increased, the relationship 
      between Ca(2+) and HCO(3)(-) reversed from Ca(2+) excess to HCO(3)(-) excess, 
      probably resulting from a relatively decreased Ca(2+) contribution from 
      dissolution of gypsum and dolomite due to dilution in mixing water. 2). recover 
      stage when the ion concentrations recovered gradually with relatively lower 
      values than that at pre-earthquake, revealing the reduction of dilute water 
      inflow. In combination with the bulk strain and PGV data, the study suggested 
      that major ion concentrations changes are attributed to dilution effect due to 
      new fracture creation or unclogging/clogging of fractures triggered by the 
      earthquake. The results could enhance the understanding of earthquake induced 
      water chemistry changes and could have implications for water resources 
      management and security in tectonically active areas.
CI  - Copyright (c) 2021 Elsevier Ltd. All rights reserved.
FAU - Chen, Liying
AU  - Chen L
AD  - State Key Laboratory of Biogeology and Environmental Geology & MOE Key Laboratory 
      of Groundwater Circulation and Environmental Evolution, China University of 
      Geosciences, Beijing, 100083, China; School of Water Resources and Environment, 
      China University of Geosciences, Beijing, 100083, China.
FAU - Wang, Guangcai
AU  - Wang G
AD  - State Key Laboratory of Biogeology and Environmental Geology & MOE Key Laboratory 
      of Groundwater Circulation and Environmental Evolution, China University of 
      Geosciences, Beijing, 100083, China; School of Water Resources and Environment, 
      China University of Geosciences, Beijing, 100083, China. Electronic address: 
      wanggc@pku.edu.cn.
LA  - eng
PT  - Journal Article
DEP - 20210417
PL  - England
TA  - Environ Pollut
JT  - Environmental pollution (Barking, Essex : 1987)
JID - 8804476
RN  - 0 (Water Pollutants, Chemical)
SB  - IM
MH  - China
MH  - *Earthquakes
MH  - Environmental Monitoring
MH  - *Groundwater
MH  - *Water Pollutants, Chemical/analysis
MH  - Water Quality
OTO - NOTNLM
OT  - Carbonate spring
OT  - Co-seismic
OT  - Hydrochemical processes
OT  - Ion concentrations
OT  - Post-earthquake
EDAT- 2021/04/28 06:00
MHDA- 2021/07/15 06:00
CRDT- 2021/04/27 20:19
PHST- 2020/05/24 00:00 [received]
PHST- 2021/04/04 00:00 [revised]
PHST- 2021/04/08 00:00 [accepted]
PHST- 2021/04/28 06:00 [pubmed]
PHST- 2021/07/15 06:00 [medline]
PHST- 2021/04/27 20:19 [entrez]
AID - S0269-7491(21)00707-7 [pii]
AID - 10.1016/j.envpol.2021.117125 [doi]
PST - ppublish
SO  - Environ Pollut. 2021 Sep 1;284:117125. doi: 10.1016/j.envpol.2021.117125. Epub 
      2021 Apr 17.