Field Investigation of a New Recharge Approach for ASR Projects in Near‐Surface Aquifers
Field Investigation of a New Recharge Approach for ASR Projects in Near‐Surface Aquifers
复制标题
近地表含水层 ASR 项目新补给方法的现场调查
DOI：
10.1111/gwat.12363
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发表时间：
2016
期刊：
影响因子：
2.6
通讯作者：
J. Butler
中科院分区：
文献类型：
--
作者：
Gaisheng Liu;S. Knobbe;E. Reboulet;D. Whittemore;F. Händel;J. Butler
含水层储存和恢复（ASR）是指在含水层水量充足时人工补给和临时储存水，并在需要时回收全部或部分水。仍然阻碍ASR有效性的一个关键限制因素是人工补给系统的建造、维护和运营成本高昂。在这里，我们研究了一种新的补给方法，在近地表松散含水层ASR使用小直径，低成本的威尔斯井安装直接推动（DP）技术。在堪萨斯中北部的一个现场，将一口DP井用于ASR补给的有效性与一个地表渗滤盆地的有效性进行了比较。现场的地表盆地性能较差，因为存在一个浅的连续粘土层（用DP剖面法确定），这限制了渗透水的向下运动，并显著降低了盆地的补给能力。DP井穿透该粘土层，能够仅通过重力以高得多的速率补给水。最重要的是，DP井的成本，包括建筑和土地成本，只是渗透盆地的一小部分。这种低成本的方法可以大大扩大ASR作为水资源管理工具的适用性，使其适用于财政资源有限的实体，如许多小城市和农村社区。本次调查的结果表明，DP威尔斯井作为近地表松散含水层ASR项目的新补给方案具有巨大潜力。
Aquifer storage and recovery (ASR) is the artificial recharge and temporary storage of water in an aquifer when water is abundant, and recovery of all or a portion of that water when it is needed. One key limiting factor that still hinders the effectiveness of ASR is the high costs of constructing, maintaining, and operating the artificial recharge systems. Here we investigate a new recharge method for ASR in near‐surface unconsolidated aquifers that uses small‐diameter, low‐cost wells installed with direct‐push (DP) technology. The effectiveness of a DP well for ASR recharge is compared with that of a surface infiltration basin at a field site in north‐central Kansas. The performance of the surface basin was poor at the site due to the presence of a shallow continuous clay layer, identified with DP profiling methods, that constrained the downward movement of infiltrated water and significantly reduced the basin recharge capacity. The DP well penetrated through this clay layer and was able to recharge water by gravity alone at a much higher rate. Most importantly, the costs of the DP well, including both the construction and land costs, were only a small fraction of those for the infiltration basin. This low‐cost approach could significantly expand the applicability of ASR as a water resources management tool to entities with limited fiscal resources, such as many small municipalities and rural communities. The results of this investigation demonstrate the great potential of DP wells as a new recharge option for ASR projects in near‐surface unconsolidated aquifers.