Catalan Water Agency, Barcelona, Spain.
Water Sci Technol. 2012;66(10):2083-9. doi: 10.2166/wst.2012.423.
The main aquifer of the Llobregat delta (Barcelona, Spain) has been affected by seawater intrusion since the 1960s. The Catalan Water Agency (ACA) has sponsored the construction of a positive hydraulic barrier in order to stop the progress of seawater intrusion advance due to the intensive aquifer development. The hydraulic barrier consists of 15 wells into which highly treated reclaimed water from the waste water treatment plant of the Baix Llobregat is injected. Water is subjected, prior to the distribution to the injection wells, to secondary and tertiary treatments, and later to ultrafiltration, UV disinfection without chlorination, and salinity reduction through reverse osmosis. A preliminary pilot phase of the project was started in late 2007, with highly positive results, and the second phase started in mid 2010. Hydrogeological and hydrochemical monitoring data indicate an efficient performance and aquifer improvement. The evaluation of such efficiency and operational costs has been analyzed and discussed.
自 20 世纪 60 年代以来，西班牙巴塞罗那的 Llobregat 三角洲的主要含水层一直受到海水入侵的影响。为了阻止由于含水层的密集开发而导致的海水入侵的推进，加泰罗尼亚水管理局（ACA）已经出资建造了一个积极的水力屏障。该水力屏障由 15 口井组成，将高度处理的再生水从 Baix Llobregat 的废水处理厂注入其中。在将水分配到注入井之前，对水进行二级和三级处理，然后进行超滤、无氯化紫外线消毒以及反渗透脱盐。该项目的初步试点阶段于 2007 年底开始，取得了非常积极的成果，第二阶段于 2010 年年中开始。水文地质和水化学监测数据表明其性能和含水层改善效果显著。已经对这种效率和运营成本进行了分析和讨论。
