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Hydrogeochemical Response of Cave Drips to Precipitation during Rainfall in a Karst Desertification Region: A Case Study of Shijiangjun Cave, South China

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  • Xiaoxi Lyu

    (School of Karst Science, Guizhou Normal University, Guiyang 550001, China
    State Engineering Technology Institute for Karst Desertification Control, Guiyang 550001, China
    These authors contributed equally to this work.)

  • Yuan Li

    (School of Karst Science, Guizhou Normal University, Guiyang 550001, China
    State Engineering Technology Institute for Karst Desertification Control, Guiyang 550001, China
    These authors contributed equally to this work.)

  • Kangning Xiong

    (School of Karst Science, Guizhou Normal University, Guiyang 550001, China
    State Engineering Technology Institute for Karst Desertification Control, Guiyang 550001, China)

Abstract

Exploring the hydrogeochemistry of cave drip water and its response to precipitation events in karst rocky desertification regions is of great significance to the paleoenvironment reconstruction of the karst desertification process using speleothem. We selected three perennial drip sites in the Shijiangjun Cave, located in Guizhou Province, Southwest China, and carried out high-frequency monitoring and sampling during two rainfalls from 22 to 25 May 2016. The major hydrogeochemical parameters of drip water and their relationships with karst desertification were analyzed. The results show that the hydrogeochemistry of the drip water in the Shijiangjun Cave, characterized by HCO 3 -Ca·Mg, was dominated by the dissolution of calcareous dolomite. The three drip sites were classified into the delayed response type (W1) and the rapid response type (W2 and W3) based on the response speed of the drip water indicators to precipitation, which were highly influenced by the piston effect and precipitation dilution, respectively. Furthermore, the response sensitivity of the drip water indicators to precipitation was constrained by the desertification degree in the rainy season, specifically, the faster response appeared in the higher desertification degree area. It is essential to select appropriate drip sites and establish an applicable indicator system for the evolutional history reconstruction of karst desertification using speleothems.

Suggested Citation

  • Xiaoxi Lyu & Yuan Li & Kangning Xiong, 2022. "Hydrogeochemical Response of Cave Drips to Precipitation during Rainfall in a Karst Desertification Region: A Case Study of Shijiangjun Cave, South China," IJERPH, MDPI, vol. 19(23), pages 1-20, November.
    • Handle: RePEc:gam:jijerp:v:19:y:2022:i:23:p:15830-:d:986403
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    References listed on IDEAS

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    1. Yiqun Tang & Jun Li & Xiaohui Zhang & Ping Yang & Jianxiu Wang & Nianqing Zhou, 2013. "Fractal characteristics and stability of soil aggregates in karst rocky desertification areas," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 65(1), pages 563-579, January.
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