地下水回灌补源防治咸水入侵技术研究 --以山东省广绕县为例

山东省广绕县井灌区由于长期超采地下水，引起区域地下水位持续下降、咸水入侵和地裂缝等一系列环境地质问题，成为区域社会和经济持续发展的制约因素。采用地下水回灌补源和调蓄技术是防治咸水入侵的有效途径。探讨了地下水回灌补源系列技术方法，涉及试验研究、数学模拟与优化技术等。室内、野外试验研究为地下水回灌规划和设计以及建立数值模拟模型提供了基本数据和参数。为了优化调整地下水开采量和回灌补源，建立了管理模型。管理模型预测表明，引用黄河水和汛期雨洪水回灌补源，以及通过节水减少漏斗区地下水开采量等系列措施可以有效地阻止咸水入侵，逐步改善区内的地下水环境。

Technology of groundwater recharge against saltwater intrusion: a case study on Guangrao County, Shandong Province

A series of environmental geological problems, such as the rapid decreasing of groundwater level, saltwater intrusion and ground surface crack had arisen from long-term groundwater overdraft in Guangrao County of Shandong Province. These problems become the critical concern as to the sustainable social and economic development of the region. Groundwater recharge and regulation of withdrawal are the effective means to prevent saltwater intru- sion. This paper discusses the integrated technology series including experiments, numerical modeling and optimal technique. The experimental studies both in field and lab provide the basic data as required for the planning and design of groundwater recharge schemes as well as the parameters for numerical simulation model. The optimal management model is developed for the purpose of reasonable regulation of groundwater pumpage and artificial recharge in the study area. The prediction results of optimal model show that combined measures of groundwater recharge by water from Yellow River and raining water in flood season, reducing groundwater pumpage in the area of the cone of water level depletion by saving water, will be feasible and workable to prevent saltwater intrusion efficiently and to improve the water environment gradually.