表层岩溶带的岩溶动力学特征及其环境和资源意义
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引用本文:蒋忠诚,袁道先.1999.表层岩溶带的岩溶动力学特征及其环境和资源意义[J].地球学报,20(3):302-308.
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作者单位
蒋忠诚 中国地质科学院岩溶地质研究所,桂林 
袁道先 中国地质科学院岩溶地质研究所,桂林 
基金项目:地矿部“九五”重大科技项目,国家自然科学基金重点项目
中文摘要:表层岩溶带处于四大圈层的交汇带,碳- 水- 钙循环活跃,溶蚀和沉积化学反应都比较迅速,岩溶动力作用强烈而且对环境变化具有敏感性。表层岩溶带快速的岩溶过程以及对环境变化的敏感性,赋存大量短时间尺度的环境变化信息,可提高地质过程在全球环境变化研究的地位; 表层岩溶带碳- 水- 钙循环的活跃和与环境岩溶动力条件的相关性,使得表层岩溶带对环境 C O2 的变化具有调节作用,从而对碳循环的研究具有重要意义;表层岩溶带的发育使南方岩溶区具有浅层岩溶水循环与地下管道水循环耦合的二次岩溶水循环的结构特征,加强了岩溶水的调
中文关键词:表层岩溶带  岩溶动力学  全球环境变化
 
Dynamics Features of the Epikarst Zone and Their Significance in Environments and Resources
Abstract:The epikarst zone is in the convergence zone of atmosphere, lithosphere, biosphere and hydrosphere. It is widespread in South China, but its sizes, landforms and locations are influenced by geological and climatic factors. The tropical and subtropical monsoon climate in South China can create such strong karst dynamic conditions as the mean annual rainfall between 1000 to 2000 mm, high average air temperature 14~21℃,and high soil air CO 2 content from 3000×10 -6 up to 50000×10 -6 ; therefore the carbon-water-calcium cycle is active and rapid. The karst dynamic processes in the epikarst zone are much stronger than the deep karst part, which results in high solution rate and hardness of water. As a result, high CO 2 flux sinks in karst water. The karst dynamic processes in the epikarst zone are sensitive to environmental changes, and hence can provide environmental information in a short time scale.Due to the development of the epikarst zone, the water cycle in karst mountain area can be divided into two parts: shallow water flow in the epikarst zone and conduit flow in the deep karst zone. In addition,the shallow water cycle is very important for water supply in karst mountains where the underground karst water is deep.
keywords:epikarst zone  karst dynamics  global environmental change
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