外源水对碳酸盐侵蚀速率研究——以桂林毛村地下河为例

本文对桂林毛村地下河流域,进行了野外监测与室内分析研究,详细研究了外源水与岩溶水对碳酸盐岩侵蚀速率差异。研究结果表明,碳酸盐岩在岩溶水与外源水中的侵蚀速率存在较大差异,雨季碳酸盐岩侵蚀速率:外源水外源水补给的岩溶水岩溶水空气;旱季碳酸盐岩溶蚀速率:外源水外源水补给的岩溶水空气岩溶水;外源水中的灰岩侵蚀速率白云岩侵蚀速率;碳酸盐岩试块的侵蚀速率具有明显的季节变化,主要受控于方解石饱和指数、pH值与水动力条件。

Research on Carbonate Rock Corrosion Rate by Allogenic Water as Exemplified by the Maocun Subterranean River in Guilin

Taking the Maocun subterranean river as a study site, in combination with field monitoring and lab analysis results, this paper dealt with differences in carbonate rock corrosion rate between allogenic water and karst water. The results showed that carbonate rock corrosion rate is different in allogenic water from that in karst water. In the rainy season, carbonate rock corrosion rate in allogenic water was larger than in karst water supplied by allogenic water, karst water and atmosphere. In the dry season, carbonate rock corrosion rate in allogenic water is larger than that in karst water supplied by allogenic water, atmosphere and karst water. Moreover, the carbonate rock corrosion rate of limestone is larger than that of dolomite. There is an obvious seasonal variation in carbonate rock corrosion rate, which is mainly controlled by calcite saturation index (SIc), pH value and hydrodynamic condition.