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Volume 38 Issue 2
Apr.  2019
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Article Contents
DANG Zheng, REN Jinhai, AN Chao, DAI Qunwei, DONG Faqin, DENG Yuanming, YANG Qingxia, ZHUO Manta. Effect of Ms 7.0 earthquake on travertine landscapes and hydrochmistry of Jiuzhaigou core scenic spots[J]. CARSOLOGICA SINICA, 2019, 38(2): 186-192. doi: 10.11932/karst20190204
Citation: DANG Zheng, REN Jinhai, AN Chao, DAI Qunwei, DONG Faqin, DENG Yuanming, YANG Qingxia, ZHUO Manta. Effect of Ms 7.0 earthquake on travertine landscapes and hydrochmistry of Jiuzhaigou core scenic spots[J]. CARSOLOGICA SINICA, 2019, 38(2): 186-192. doi: 10.11932/karst20190204

Effect of Ms 7.0 earthquake on travertine landscapes and hydrochmistry of Jiuzhaigou core scenic spots

doi: 10.11932/karst20190204
  • Publish Date: 2019-04-25
  • There was an earthquake with magnitude of 7.0 occurred in 8th August, 2017. The Jiuzhaigou scenic spot is located in the vicinity of epicenter area which was seriously damaged. After the earthquake, the research group carried out surveys of the scenic spot and collected samples in the surface water of Pearl Shoal, Mirror Lake, Nuorilang Waterfull and Sparking Lake. Through the analysis of the spatial-temporal distribution characteristics and correlation of main ions in the surface water, the damage of the scenic spot landscape and the change of hydrochemical characteristics were preliminarily assessed. Results demonstrated that this earthquake caused the damage including cracking and collapse to some core landscapes in Jiuzhaigou valley, among which the Sparking Lake was the worst damaged. Hydrochemistry of surface water after earthquakes was related to the change of Ca2+ and HCO3- concentrations, both ions were higher than historical data with increasing mineral dissolution caused by earthquake and precipitation. The concentration of Ca2+ and HCO3- decreased with decreasing altitude due to the influence of travertine depositions.The concentration of Ca2+ decreased with time which were related to the precipitation decreases, and the concentration of HCO3- decreased first and then increased with time, it was deduced that CO2 dissolution in water has rose. After the earthquake,the SIc value in surface runoff of 4 landscapes was more than 0,which was easy to travertine deposition. The hydrochemical results show that the earthquake increased the concentration of Ca2+ and HCO3- in the water , if the artificial intervention is implemented in time, the damaged landscape could be restored.

     

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