冲洪积扇含水层地下水可开采量数值模拟——以文峪河冲洪积扇为例

依据钻孔岩性，水文地质资料，将文峪河冲洪积扇平原分为上游单一潜水区和中下游承压水区，中下游垂向划分为上部弱水含水层和下部较强承压水含水层，对上游潜水和中下游承压水用二维侧向流数学模型，对中下游弱潜水用一维垂向流数学模型，在计算了现状开采条件下的水资源基础上，进一步计算出，在扇上游集中采水时，按工业开采和农业开采，以地下水多年总补排均衡，水位长期稳定的约束条件地下水可开采量。

The numerical modeling on exploitable quantity of groundwater in aquifer of alluvial

On the basis of drill hole lithology and hydrogeological data, the alluvial pluvial fan of Wenyu river is grouped on plan into phreatic water area in the upper reach and confined water area in the middle lower reach. The middle lower reach is also subdivided vertically into weak phreatic aquifer in the upper part and strang confined aquifer in the lower. Phreatic water in upper reach and confined water in middle lower reach are both modelled by way of mathematical model of two dimensional lateral inflow, and weak phreatic water of middle lower reach is surely done by means of one dimensional vertical underflow. On the basis of computing the present exploitation situation of water resources, the exploitable quantity of groundwater is also computed in accordance with the quantity of industrial and agricultural water exploitation concentrated in the fan of the upper reach on the constraining condition that the perennial total recharge and discharge of groundwater should be in equilibrium and there should be a prolonged stable watertable.