【摘要】 通过多功能自动化监测记录仪CTDP300,对金佛山表层岩溶泉碧潭泉物理化学性质的昼夜变化过程进行了研究。短时间尺度监测表明,岩溶动力系统对环境变化比较敏感,响应及时,水的物理化学性质昼夜动态变化在不同气候条件下有不同表现。在无雨条件下,水温的变化与气温基本一致,电导率峰值区滞后温度数小时,这可能与植被从光合作用向呼吸作用转变导致大气CO2浓度产生较大的梯度变化有关,而这种梯度十分有利于岩溶作用的进行,但由于植被覆盖和地质构造等因素的差异,滞后时间有较大不同;在暴雨期间,虽有植被和土壤的阻挡和调蓄作用,降雨对碧潭泉岩溶水还是有较强的稀释作用,但开始降雨后数小时左右,表层岩溶带高裂隙率和渗透性开始发挥作用,水动力作用和CO2效应逐渐占主导地位。更多还原

【Abstract】 Mt.Jinfo,a karst dynamic system monitoring site,lies in Nanchuan city,Chongqing province.The data from the site′s automatic records（CTDP300） indicates that the karst dynamic system is highly sensitive to the environment.The physico-chemical variation of the epikarst spring water is quite different under different climatic condition.In normal days without rainfall,water temperature and air temperature have the same variation,and its peak zone lags behind the top temperature for several hours.This is probably attributed to the gradient of CO₂ concentration in atmosphere caused by the conversation of vegetation from photosynthesis,which is helpful to the karst process.Furthermore there is difference in the time behind the top temperature because of the vegetation cover and the geographical structure.At the beginning of a rainstorm,the physico-chemical variation of spring is mainly controlled by the dilute effect with the adjusting of vegetation and soil.It can last for the entire rainfall process,but several hours later,the hydrodynamic effect and the CO₂ effect will occupy the dominant position due to the high fissure rate and permeability in epikarst zone.So it is necessary to explain the hydrochemical behavior of epikarst process in the water-rock-CO₂ system.更多还原