北京市平谷盆地地下水三维数值模拟及管理应用

Development of a 3-D numerical groundwater flow model of the Pinggu Basin and groundwater resources management

摘要: 为缓解北京城区的用水紧张问题,平谷区建立了王都庄和中桥两个应急水源地。持续过量的开采导致盆地内水位急剧下降。为研究大规模开采对平谷盆地地下水系统的影响,并分析不同地区的开采潜力,本文建立了合理刻画三维地下水流动特征的数值模型,对五种不同的开采方案进行模拟。模拟结果表明,丰水条件下地下水位回升明显,王都庄水源地补给条件优越,尤其是盆地上游地区,具有更大的开采潜力;而盆地中下部应适当限制开采,避免水位下降过快。高仿真的数值模型可作为强有力的管理辅助工具,为地下水资源分析及合理利用提供科学的技术支持。

Abstract: As the capital of China,the city of Beijing faces a serious threat of groundwater over-exploitation.In order to lighten the contradiction between water demand and water supply,two emergence wellfields were constructed in the Pinggu basin located in the eastern Beijing.Continual over-exploitation of groundwater led to a sharp decline in water levels in the basin,especially near the wellfields.The main intent of this study is the development of a 3-D transient groundwater flow for analyzing the wa...