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首页> 外文会议>Water Pollution IX : Modelling, Monitoring and Management >Overexploitation and water quality in the Crevillente aquifer (Alicante, SE Spain)
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Overexploitation and water quality in the Crevillente aquifer (Alicante, SE Spain)

机译：Crevillente含水层（西班牙阿利坎特）的过度开发和水质

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摘要

The Crevillente aquifer is a karstic aquifer, situated in Alicante province in the SE of Spain. The aquifer basically comprises a series of Jurassic limestones and dolomites, belonging to the Betic Cordillera. Intense exploitation of the aquifer started in the early 1960s. Exploitation was initially concentrated in two sectors of the Sierra de Crevillente and, years later, extended to a third sector. As a consequence of abstractions that were much greater than recharge into the system, a continual drop in the water level persisted for several decades. These abstractions have occasionally caused local dewatering over depths of more than 300 m. From a hydrogeological point of view, the aquifer dewatering in one of the sectors was accompanied by increased mineralization and a fall in quality of the groundwater, and several boreholes had to be abandoned. In recent years, the degree to which the aquifer is overexploited has fallen considerably, and it appears to have entered a new hydrodynamic stage. New hydrogeochemical characterisations have been carried out, which indicate that the aquifer water is relatively strongly mineralised due, fundamentally, to the dissolution of evaporite rocks. On the other hand, deterioration in water quality as a consequence of the degree of overabstraction can also be confirmed.
机译：Crevillente含水层是岩溶含水层，位于西班牙东南部的阿利坎特省。含水层主要由一系列侏罗纪石灰岩和白云岩组成，属于贝蒂山脉。对含水层的大规模开采始于1960年代初。剥削最初集中在塞维利亚山脉的两个地区，几年后，又扩展到了第三地区。由于提取的水量远大于向系统中补给的水量，因此水位持续下降持续了数十年。这些抽象现象偶尔会引起300 m以上深度的局部脱水。从水文地质学的角度来看，其中一个地区的含水层脱水伴随着矿化作用的增加和地下水质量的下降，因此必须放弃几个钻孔。近年来，含水层被过度开采的程度已经大大降低，似乎已经进入了一个新的流体动力学阶段。已经进行了新的水文地球化学表征，这表明含水层水的矿化程度相对较高，这主要是由于蒸发岩的溶解。另一方面，也可以确认由于过度吸收的程度导致的水质恶化。

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