地下水储备的双重缓冲概念辨析OA

China's groundwater reserve system is still in its infancy.Groundwater reserve involves a long-term,low-frequency dynamic process.The development of the groundwater reserve system urgently requires addressing several key technical issues.Based on an investigation of the maintenance,utilization,and recovery processes of groundwater reserve,this study proposes two buffering concepts:buffer water volume and buffer time.The buffer water volume reflects the relationship between groundwater storage volume and reserve volume within the combined groundwater reserve and buffer spaces,which is represented by the water volume buffering coefficient.Buffer time reflects the extension of the guaranteed water-supply duration during the groundwater reserve utilization period due to induced recharge,and this effect is comprehensively represented by the time buffering coefficient.On the basis of conceptual interpretation,quantitative methods for evaluating the buffering coefficients are proposed,including theoretical formulas,parameter sets,and scenario simulation techniques.In theory,both the water volume and time buffering coefficients are greater than 1.Their actual values depend on the hydrogeological conditions and the groundwater extraction method using dedicated wells.In typical examples in which confined aquifers are used as the groundwater reserve space,the water volume buffering coefficient can exceed 200,while the time buffering coefficient can exceed 20.The buffering effect also has an important impact on the recovery process of groundwater reserve after the utilization period.Further extensive and in-depth discussion and research are needed regarding the reliability and practicality of quantitative descriptions such as storage volume,reserve volume and buffering coefficients.