摘要
应用数理统计相关分析方法，对过去50年滹沱河流域平原区地下水流场演变特征及其与降水量和开采量之间关系的研究表明，常年性地下水位降落漏斗是地下水流场发生异变的标志性特征。在气候不断旱化背景下，地下水开采量和开采强度的不断增大导致该平原区地下水系统从1971年以前的补给-开采的自然均衡状态，经过1971～1979年期间补给-开采基本均衡状态，至1980年之后演变为严重超采状态。同天然状态下地下水流场相比，漏斗区地下水流方向与区域流场明显不一致，某些地段甚至逆向流动。关联分析结果表明，开采量是滹沱河流域平原区地下水流场异变的主导因素，降水量变化是重要影响因素。降水量增减通过影响地下水开采量大小和补给量多少的变化，对地下水流场产生不同的影响。减少开采量或降水量连年显著增大，区内地下水流场异变才能够产生根本性转变。因此，适时调控开采量，使其与气候变化规律相一致，有利于遏制该区地下水流场异变态势。
The evolution of groundwaer flow field in plain area of the Hutuo River basin and the impact of precipitation and groundwater exploitation in the past 20 years are analyze by means of statistics. The result shows that the variation of flow field is characterized by the funnel type groundwater drop down with the funnel center located at the Shijiazhuang City. On the back ground of drought climate in the recent years the continuous increase of exploited groundwater water amount and intensity resulted in the increase of funnel depth and the groundwater in this area is concentrated towards the funnel center. This phenomenon leads to significant change of groundwater flow field. In some places even inverse flow direction occurs, which is obviously different from the natural flow orientating from northwest to southeast. The correlation analysis result shows that the overexploitation of groundwater is the main cause affecting the flow field of this area. Reasonable utilization of ground water according to the variation of precipitation is vital to this area for suppressing the deteriorated tendency of the abnormal variation of groundwater flow field.
出处
《水利学报》
EI
CSCD
北大核心
2008年第6期747-752,共6页
Journal of Hydraulic Engineering
基金
国家重点基础性研究项目(2006CB403401)
国家科技支撑计划项目(2007BAD69B02)
关键词
滹沱河流域
地下水流场异变
气候旱化
超采地下水
关联性
abnormal variation
groundwater flow field
drought climate
overexploitation of groundwater
correlation analysis
Hutuo River basin
