基于灰色关联熵的乾安县地下水环境演化方向判别研究

摘要

针对近年来吉林省西部乾安县地下水过量开采带来的一系列水环境问题,采用灰色关联系数及信息熵的熵变理论开展了研究区地下水环境演化研究.选取1998～2010年地下水实际开采量与地下水可开采量序列数据,在该区灰色关联系数计算结果基础上建立了地下水系统演化方向的信息熵判别模型,揭示该区水资源利用的不均匀性；通过模型计算,1998、2004、2008及2010年研究区地下水开采量的灰色关联熵分别为3.58、3.65、3.78及3.72,整体呈现先增长后减小的趋势,表明地下水环境处于失稳状态,向着重建稳定态的过程演变.%According to a series of water environmental problems resulted from exploiting groundwater excessively in Qianan County, western part of Jilin Province, information entropy theory was used to study the groundwater environment evolution in a study area.The data series of groundwater yield and groundwater available yield from 1998 to 2010 were chosen to establish groundwater system evolution direction distinguishing model based on gray relation entropy. The results show that water resources utilization is uneven, and from the computing model the gray relation entropy are 3.58, 3.65, 3.78 and 3.72 respectively in 1998, 2004, 2008 and 2010. The results also indicate that the groundwater environment is in the unsteady condition and tends to build another steady condition.