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Comparison of Recharge Estimation Methods During a Wet Period in a Karst Aquifer

机译：岩溶含水层湿润时期补给量估算方法的比较

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摘要

Management of water resources, implying their appropriate protection, calls for a sound evaluation of recharge. Such assessment is very complex in karst aquifers. Most methods are developed for application to detrital aquifers, without taking into account the extraordinary heterogeneity of porosity and permeability of karst systems. It is commonly recommended to estimate recharge using multiple methods; however, differences inherent to the diverse methods make it difficult to clarify the accuracy of each result. In this study, recharge was estimated in a karst aquifer working in a natural regime, in a Mediterranean-type climate, in the western part of the Sierra de las Nieves (southern Spain). Mediterranean climate regions are characterized by high inter-annual rainfall variability featuring long dry periods and short intense wet periods, the latter constituting the most important contribution to aquifer water input. This paper aims to identify the methods that provide the most plausible range of recharge rate during wet periods. Six methods were tested: the classical method of Thornthwaite-Mather, the Visual Balan code, the chloride balance method, and spatially distributed methods such as APLIS, a novel spatiotemporal estimation of recharge, and ZOODRM. The results help determine valid methods for application in the rest of the unit of study and in similar karst aquifers.
机译：对水资源的管理，意味着对水资源的适当保护，要求对补给进行合理的评估。这种评估在岩溶含水层中非常复杂。大多数方法都是开发用于碎屑含水层的，而没有考虑到岩溶系统孔隙度和渗透率的非均质性。通常建议使用多种方法来估计补给。但是，由于各种方法固有的差异，因此很难澄清每个结果的准确性。在这项研究中，估计了一个自然状态下的喀斯特含水层，在地中海型气候中，在Sierra de las Nieves的西部（西班牙南部），补给了水。地中海气候区的特点是年际降雨变化大，干旱期长而强烈期短，后者是含水层水输入的最重要贡献。本文旨在确定在潮湿期间提供最合理的充电速率范围的方法。测试了六种方法：Thornthwaite-Mather的经典方法，Visual Balan代码，氯化物平衡方法以及空间分布方法，例如APLIS，新颖的时空补给估算和ZOODRM。结果有助于确定在其余研究单元和类似喀斯特含水层中应用的有效方法。

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