Scholarlink

<p>High-intensity tourism elevates cave CO<sub>2</sub> levels, significantly impacting drip water hydrogeochemistry and flowstone deposition. During the peak tourist period in 2023, continuous monitoring was conducted in Dawang Cave, Anhui Province, to analyze cave air CO<sub>2</sub> partial pressure (PCO<sub>2(A)</sub>), visitor numbers, and drip water parameters. Results show that: (1) PCO<sub>2(A)</sub> exhibits diurnal variations, higher during daytime and lower at night, and spatially decreases with enhanced ventilation, influenced by cave morphology, ventilation, and tourist activity. (2) PCO<sub>2(A)</sub> exerts a more pronounced control on CO<sub>2</sub> solubility in drip water than temperature, playing a pivotal role in karst development and sediment deposition patterns. (3) CO<sub>2</sub> partial pressure of drip water (PCO<sub>2(W)</sub>), temperature, and PCO<sub>2 (A)</sub> display synchronous diurnal fluctuations. Calcite saturation index, pH, and HCO<sub>3</sub><sup>−</sup> are inversely correlated with PCO<sub>2(A)</sub>, while EC and Ca<sup>2+</sup> show no significant diurnal variation. Increased tourist numbers and prolonged stays widen the variation range of chemical indicators. Structural differences among monitoring sites lead to varying ventilation and CO<sub>2</sub> diffusion rates, differentially affecting drip water chemistry and sediment deposition. This study provides a scientific basis for visitor management and the conservation of karst sedimentary environments.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Spatiotemporal variation of cave CO2 under short-term high-intensity tourism activities and its response to drip water hydrogeochemical processes

  • 期刊论文

  • 发表日期：

    2026年3月4日

查看全文
  • Mingda Cao,
  • Jie Zhang,
  • Min Jiang,
  • Zhiqiang Yao,
  • Mengting Yang,
  • Kun Qian,
  • Chi Zhang,
  • Wei Wu,
  • Yihui Chen

摘要

High-intensity tourism elevates cave CO2 levels, significantly impacting drip water hydrogeochemistry and flowstone deposition. During the peak tourist period in 2023, continuous monitoring was conducted in Dawang Cave, Anhui Province, to analyze cave air CO2 partial pressure (PCO2(A)), visitor numbers, and drip water parameters. Results show that: (1) PCO2(A) exhibits diurnal variations, higher during daytime and lower at night, and spatially decreases with enhanced ventilation, influenced by cave morphology, ventilation, and tourist activity. (2) PCO2(A) exerts a more pronounced control on CO2 solubility in drip water than temperature, playing a pivotal role in karst development and sediment deposition patterns. (3) CO2 partial pressure of drip water (PCO2(W)), temperature, and PCO2 (A) display synchronous diurnal fluctuations. Calcite saturation index, pH, and HCO3− are inversely correlated with PCO2(A), while EC and Ca2+ show no significant diurnal variation. Increased tourist numbers and prolonged stays widen the variation range of chemical indicators. Structural differences among monitoring sites lead to varying ventilation and CO2 diffusion rates, differentially affecting drip water chemistry and sediment deposition. This study provides a scientific basis for visitor management and the conservation of karst sedimentary environments.