华北平原超采区浅层地下水埋深变化及控制因素分析

Analysis of buried depth variation and controlling factors of shallow groundwater overexploited areas of in North China Plain

为了准确识别华北平原浅层地下水超采变化和控制因素,通过收集分析华北平原浅层地下水埋深分布及动态资料,基于典型潜水监测站2005-2015年的监测数据,结合全国水资源公报选取代表年分析华北平原地下水埋深分布并通过BP神经网络方法确定了超采区浅层地下水变化的控制因素。研究表明:2005-2015年华北平原地下水除北京少部分地区埋深减少外,其余大部分均表现出埋深持续增加的特征;人工开采地下水是影响华北平原浅层地下水的控制因素。

In order to exactly identify the variation and the controlling factors of shallow groundwater over-exploitation in North China Plain,we collected and analyzed the shallow groundwater depth distribution and regime data in North China Plain.The representative year was selected to analyze the distribution of groundwater depth in North China Plain based on the data of hydrological factors of the typical shallow groundwater observation stations from 2005 to 2015,and by combining with the national water resources bulletin.The controlling factor affecting the variation of shallow groundwater in overdraft areas was identified by the Back-Propagation(BP)neural network analysis method.The results indicates that most areas of North China Plain show a continuous increase in buried depth except for a few areas.Artificial groundwater exploitation is the controlling factor affecting shallow groundwater in North China Plain.