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利用高分辨率水文水化学自动记录仪,对地处湿润亚热带季风气候条件下的贵州省黔南峰丛洼地区的板寨和黄后,以及位于黔中高原面上丘原区的后寨3个岩溶流域进行了为期6年半(2007年5月至2013年10月)的连续监测。结合流域出口水中主要化学组分的野外滴定与室内分析实验,建立了水中碳酸氢根、钙和镁等主要离子与电导率之间的线性相关关系,进而获得了高时间分辨率的水中CO_2分压、方解石饱和指数和岩溶碳汇通量等指标。数据统计分析发现:(1)板寨、黄后和后寨岩溶流域的多年平均岩溶碳汇通量分别为29、33和39 t-CO_2km~(-2)·a~(-1);(2)岩溶流域出口水中碳酸氢根离子具有化学稳定性行为,流量是流域岩溶碳汇通量的主控因子。
Using high-resolution hydrometeorochemical automatic recorder, the authors found that there are three karsts located in Banzhai and Huanghou in Fengsu depression of Qiannan in Guizhou Province and the Houzhai in the upper mound of Central Guizhou Plateau under humid subtropical monsoon climate The river basin was continuously monitored over a period of six and a half years (May 2007 to October 2013). Combined with the field titration and laboratory analysis of the main chemical components in the outlet water, a linear correlation between the main ions such as bicarbonate, calcium and magnesium in the water and the conductivity was established, and the CO 2 content in water with high time resolution Pressure, calcite saturation index and carbon flux of karst flux and other indicators. The statistical analysis of the data shows that: (1) The mean annual carbon sequestration flux over the years in Panzhai, Huanghou and Houzhai karst basins is 29, 33 and 39 t-CO 2 km -2 · a -1; ) The bicarbonate ions in the outlet water of karst watershed are chemically stable. The flux is the main controlling factor of the carbon flux in the karst watershed.