Estimating groundwater recharge induced by engineering systems in a semiarid area (southeastern Spain)
Estimating groundwater recharge induced by engineering systems in a semiarid area (southeastern Spain)
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DOI：
10.1007/s00254-006-0541-5
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发表时间：
2007-04
期刊：
影响因子：
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通讯作者：
W. Martín-Rosales;J. Gisbert;A. Pulido-Bosch;Á. Vallejos;Á. Fernández-Cortés
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文献类型：
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作者：
W. Martín-Rosales;J. Gisbert;A. Pulido-Bosch;Á. Vallejos;Á. Fernández-Cortés
半干旱地区水资源的稀缺通常伴随着短暂的相当强的降水，这可能会产生灾难性的洪水。在这些地区，利用径流补给含水层既有助于防止洪水泛滥，也有助于有效管理水资源。本文介绍了在西班牙东南部进行的一项研究的结果，该研究的重点是一些工程结构(淤地坝)和砾石坑引起的补给。目前的淤地坝网络由107个淤地坝组成，其中位于透水基质之上，因此我们可以诱导滞留在其中的暴雨径流的补给。水文模型使用土壤保护局的曲线数法(CN)，使用HEC-HMS程序。结果表明，根据坝内有效水量和底质的不同，淤地坝入渗径流的比例在3%~50%以上。此外，利用若干砾石坑之一的存在，在一个次盆地中进行了水文模拟。砾石坑位于冲积扇的顶部，覆盖着被广泛过度开采的水文地质单元，因此它们处于很好的位置，可以用于人工补给。在这种情况下，我们得出结论，一个坑能够在不同的重现期(5年、25年、50年和100年)保留和渗透综合径流量。此外，所进行的模拟表明，这些环境中的补给过程与阶段性风暴事件密切相关。因此，将水文地质标准纳入淤地坝的设计和建造中，对于优化半干旱地区的水资源管理是非常有用的。
The scarcity of water resources in semiarid regions is usually accompanied by brief periods of quite intense precipitation that can generate potentially catastrophic floods. In such regions, the use of runoff water for aquifer recharge can contribute to both flooding prevention and effective management of water resources. This paper presents the results of a study undertaken in southeastern Spain focusing on the recharge induced by a number of engineering structures (check dams) and gravel pits. The current network of check dams consists of 107 dams, of which 64 are located over permeable substrates and so we can induce recharge of the storm runoff retained therein. The hydrological model was performed using the curve number method (CN) of the Service for the Conservation of Soils, utilizing code HEC-HMS. Results indicate that the proportion of runoff infiltrated through the check dams varies from 3% to more than 50%, according to the effective volume of water dammed and the substrate. In addition, hydrological modelling was carried out in a subbasin taking advantage of the presence of one of a number of gravel pits. The gravel pits are situated in the apical sectors of alluvial fans that overlie hydrogeological units that are widely overexploited, and so they are well positioned for use for artificial recharge. In this case, we conclude that a pit is capable of retaining and infiltrating the combined runoff volumes for various return periods (5, 25, 50, and 100 years). Furthermore, the simulation carried out suggests that the recharge processes in these environments are intimately linked to episodic storm events. The incorporation of hydrogeological criteria in the design and construction of check dams could therefore be very useful for the optimum management of water resources in semiarid zones.