开采条件下黄土丘陵区地下水系统动态研究——以内官–香泉盆地为例

Dynamic of Groundwater System under Human Abstraction in the Loessial Hilly Area —A Case Study in the Neiguan-Xiangquan Basin

摘要: 以甘肃省定西市内官–香泉盆地为研究区，根据2001~2010年该区地下水实际开发利用，地下水动态及资源评价基本理论方法，计算并分析了区内44口长观井所代表的地下水系统变化规律。结果表明，强烈的地下水开采改变了内官–香泉盆地地下水系统的天然源汇项构成，进而影响到地下水系统格局及动态。2001年以来，内官–香泉盆地地下水位呈现明显的开采型动态，并处于活跃下降阶段。

Abstract: In this study, we investigated the groundwater system dynamic influenced by the human abstrac-tion in a typical loessial hilly area named the Neiguan-Xiangquan Basin (NXB). Groundwater level meas-urements of the 44 wells in the region from 2001 to 2010 were used to quantify the change during the time period. A holistic method of groundwater assessment was adopted to quantitatively illustrate the groundwater dynamic. Quantifications suggested a strong impact of human abstraction on both recharge and discharge of the groundwater system. Patterns of groundwater were deeply influenced and varied broadly when compared between groundwater levels of the year 2001 and 2010, revealed that the groundwater system in the NXB had represented an obvious human abstraction-forced dynamic, with a very active and sensible drawdown across the whole area.