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为了研究雪玉洞地下河系统水文水化学在暴雨前后的动态变化特征,利用Davis Vantage Pro2小型自动气象站获取当地的降雨量,用多参数水质自动记录仪(CDTP300)监测地下河的水位、水温、pH值和电导率,分析结果表明:地下河水位随降雨暴涨暴落,其水温、电导率、pH值对降雨响应迅速,能敏锐地感应和反馈外界环境的变化.酸雨可能引起地下河pH值的降低,因此应重视酸雨对岩溶地下河水文地球化学的影响.雨水的稀释作用是降雨过程中地下河水化学变化的主要控制过程.进一步利用WATSPAC软件计算泉水方解石饱和指数(SIC)、白云石饱和指数(SID)、石膏饱和指数(SIG)和p(CO2),发现SIC,SID,SIG在降雨期间均呈明显降低趋势,推断可能受雨水稀释的影响,而p(CO2)值升高,可能受CO2效应的控制.
In order to study the dynamic change characteristics of the Hydrology and Hydrochemistry in the underground river system of Xueyu Cave before and after the heavy rain, the rainfall was obtained by using the Davis Vantage Pro2 small automatic weather station. The water level of the underground river was monitored by a multi-parameter automatic water logging recorder (CDTP300) , PH value and conductivity.The results show that the groundwater level fluctuates with rainfall, and its water temperature, conductivity and pH value respond quickly to rainfall, and can sensitively and feedback the changes of the external environment.The acid rain may cause the underground river pH value Therefore, we should pay attention to the influence of acid rain on the hydrogeochemistry of karst underground river.Drainage of rainwater is the main control process of the chemical change of underground river during the rainfall process.Furthermore, using WATSPAC software to calculate spring water calcite saturation index (SIC), dolomite saturation (SID), gypsum saturation index (SIG) and p (CO2), it was found that SIC, SID and SIG both decreased obviously during rainfall, suggesting that the p (CO2) value may be affected by the dilution of rainwater and may increase Controlled by the CO2 effect.