地下水控制性临界水位及确定方法

Dominant critical water level of groundwater and its determining method

地下水位及其变化趋势是衡量地下水资源开发是否合理的重要评判依据,为了充分反映地下水系统的功能属性和水资源管理要求,在辨析地下水控制性临界水位与上限、下限临界水位相关概念的基础上,以维系地下水资源功能、生态功能和地质环境功能可持续为目标,考虑地下水流动系统的整体性和协调性,通过构建多元量化关系模型,由各功能和类型分区单井临界水位划定成果加权得到各管理分区面水位阈值。以地下水开发利用问题较为突出的河北省平原区为研究对象,基于各代表性监测井2001—2013年水位数据构建量化关系模型,地下水控制性临界水位划定结果表明:河北省平原区浅层地下水控制性上限临界埋深阈值为1.93~13.19 m,控制性下限临界埋深阈值为10.94~27.06 m;深层地下水控制性临界埋深阈值为12.15~49.09 m。

As groundwater level and its changing law are the important bases for judging whether groundwater development is reasonable or not,the thresholds of the areal groundwater levels of all the relevant management sub-districts are obtained by weighting the delineation results of the critical water levels of the single wells within the sub-districts of all the functions and types through establishing a multi-quantified relationship model under the consideration of the integrity and coordination of the groundwater flow system by taking maintaining the sustainabilities of the resource function,ecological function and geological function of groundwater as the target on the basis of discriminating the correlative concept between the dominant critical water level of groundwater and the upper and lower limits of the critical water level,so as to fully reflect the functional attribution and the water resources management requirement By taking the plain area of Hebei Province with more outstanding problem from the development and utilization of groundwater as the study object,a quantified relationship model is established in accordance with the water level data of 2000-2013 from all the representative monitoring wells,and then the delineation results of the dominant critical water levels of the groundwater therein show that the threshold of the upper dominant critical buried depth is 1.93~13.19 m and the threshold of the lower dominant critical buried depth is 10.94~27.06 m for the shallow groundwater within the plain area of Hebei Province,while threshold of the dominant critical buried depth of the deep groundwater is 12.15~49.09 m therein.