基于人工调蓄的石川河河谷疏干含水层恢复效果分析

石川河河谷阶地区地下水资源长期大量超采,致使一定区域的含水层被疏干,利用疏干的含水层储水空间进行水资源的人工调蓄对恢复区域地下水位意义重大。对此,设计并模拟了在维持开采、压缩开采和增加开采的基础上进行人工回灌等调蓄方案,对石川河河谷区阶地区进行水资源人工调蓄,并分析了各方案下的地下水位恢复情况。结果表明,地下水调蓄可显著改善该区域地下水的失衡状况,增加回灌量与减少开采量相结合的调蓄方案,使地下水环境的恢复效果明显。在压缩开采量的基础上,可采取分季节人工回灌4.6×107 m3/a的方案;在增加开采量的基础上,可采取分季节人工回灌5.4×107 m3/a的方案。研究成果可为区域地下水资源恢复工作提供决策依据。

Evaluation of Restoration Effect in Shichuan River Valley Dewatering Aquifer through Groundwater Artificial Recharge

Groundwater overexploitation for long time in the area of Shichuan River Valley resulted in aquifer dewatering in certain area. Artificial regulation of water resource by using dewatering aquifer storage space for restoration of groundwater level is of great significance. We design and simulate the schemes to regulate water resources artificially in the area, such as artificial recharge based on current exploitation, compression and increase of exploitation and analyze the restoration of groundwater in all schemes. The results show that the groundwater regulation can significantly improve the imbalance of groundwater in the area. The plan which combines increasing the water-diversion volume with reducing the development capacity can make the restoration effect of groundwater environment obviously. On the basis of reducing pumping, we can use the scheme of artificial recharging 46 million m3/a according to the season while on the basis of increasing pumping, we can use the scheme of artificial recharging 54 million m3/a according to the season. The research results can provide the decision making for recovery of regional groundwater resource.