大安市地下水动态变化规律及影响因素分析

Analysis of Variation Regulation and Influence Factors of Groundwater Dynamic in Daan City

根据大安市1960-2009年的气象、地下水开采量及埋深等数据资料,分析了大安市地下水动态变化规律,并利用主成分分析法(PCA)分析了降水量、蒸发量、农业开采量、工业开采量及生活用水量等影响因素对地下水埋深的影响程度,研究了大安市地下水位在气象变化和人类活动影响下的变化特征及其主要控制因素。结果表明,地下水埋深随气候变化呈现出明显的季节性变化规律,在自然条件和人类活动等各因素中,农业用水量对地下水埋深的影响程度最大,且影响程度逐年增大。研究结果可以为合理布局开采井位置和制定完善的水资源调控方案提供理论依据。

According to the data of meteorology, groundwater exploitation and groundwater buried depth in Daan city from1960 to 2009, the article analyzed the regulation of groundwater dynamic variation, and calculated the degree of the influences caused by the variable factor like precipitation, evaporation, agricultural and industrial exploitation and domestic water consumption to the groundwater by using principal components analytic method,studied the variation regulation of groundwater dynamic under the influence of climate change and human activities in Daan city and analyze the degree of the influences on it. The results showed that the groundwater buried depth indicates a clear seasonal variation with the change of climate. Among various factors includes natural conditions and human activities, the agricultural exploitation, had the largest impact on the groundwater buried depth and the influence extent presents the yearly increase trend in recent years. The results could provide theoretical support for policymakers to make the reasonable layout of the exploitation wells and develop comprehensive program of configuration control of water resource.