神木县刘家湾水源地不同取水方式对比分析

在对研究区的水文地质条件进行分析后,设计了3种常用开采方案:廊道、辐射井和渗流井.通过引入等效渗透系数的概念构建3种取水建筑物的“渗流-管流”耦合模型,从而进行开采量的计算.计算出研究区在廊道、辐射井、渗流井的作用下允许开采量分别1.49、1.9、2.87万m3/d.计算结果表明:渗流井与相同技术条件下的廊道及辐射井相比,取水结构的出水量大,供水保证率高,并且在建议开采量下含水层的水位降深在允许范围内.最终以取水效率高为目标,确定神木县刘家湾水源地采用渗流井方式开采地下水,对研究区合理开发利用地下水具有重要意义.

Contrast analysis of different water ways in Liujiawanwater source of Shenmu county

Based on a brief introduction of hydrogeological conditions, three well exploiting plans were primarily selected such as gallery, radial well and seepage well. In order to calculate the reasonable exploiting yield, the concept of equivalent permeability coefficient was used to construct the model of coupled seepage and pipe flow. The reasonable exploiting yield of gallery, radial well and seepage well are 149000,0and 287000cubic meter per day.The simulation results suggested that the water supply of seepage well is higher than that of gallery or radial well and has high guarantee rate in the same technology condition. Seepage wall is chosen as the best exploiting plan to get a high water efficiency, which has very importment significant for the reasonable exploitation of groundwater in this region.