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利用水文水化学自动记录仪,对缺土的板寨原始森林区岩溶地下河系统径流排泄点进行了3个水文年(2007-01—2010-06)的自动监测,运用水均衡计算、岩溶水流量衰减分析和H、O稳定同位素等方法,对该地下河系统径流排泄点的水-碳动态进行了研究.结果表明:(1)原始森林的蒸散发异常强烈,入渗系数低,地下河产流少;(2)在缺乏土壤盖层的条件下,即使是原始森林,其水文(Q)、水化学(HCO3-浓度)调控能力仍然有限,因而岩溶作用强度和碳汇能力较低.这些特征反映出土壤在水资源和碳循环调控中的重要作用.
Using automatic hydrograph data recorder, the runoff drainage sites of karst groundwater system in the original forest area of Banzhai in the aboriginal land were monitored automatically for three years (2007-01-2010-06). Water balance calculation, karst water Flow decay analysis and H, O stable isotopes were used to study the water-carbon dynamics of runoff drainage points in the underground river system.The results show that: (1) The evapotranspiration of the virgin forest is extremely strong, the infiltration coefficient is low, (2) In the absence of soil cover, even the virgin forests have limited ability to control hydrological (Q) and water chemistry (HCO3-concentration), resulting in lower karst intensity and carbon sequestration. These characteristics reflect the important role of soil in the regulation of water resources and carbon cycle.