Temperature of groundwaters in coastal aquifers: some aspects concerning salt-water intrusion
Tulipano, L.; Fidelibus, M.D. (1989). Temperature of groundwaters in coastal aquifers: some aspects concerning salt-water intrusion. Natuurwet. Tijdschr. 70(1-4): 308-316
In: Natuurwetenschappelijk Tijdschrift. L. Walschot/Natuur- en Geneeskundige Vennootschap: Gent. ISSN 0770-1748, more
Also appears in:
De Breuck, W.; Walschot, L. (Ed.) (1989). Proceedings of the 10th Salt-Water Intrusion Meeting Ghent (Belgium), 16-20 May 1988. Natuurwetenschappelijk Tijdschrift, 70(1-4). Natuurwetenschappelijk Tijdschrift: Gent. 408 pp., more
The temperature of groundwaters is mainly a function of their mobility in an aquifer. The more anisotropic the aquifer the more pronounced the thermal variations developing in it. In a coastal aquifer the presence of seawaters at the base of fresh groundwaters and mixing processes between these two types of waters are the additional factors which influence temperature distribution. In fact the residence times of salt waters are generally much longer than those of fresh waters. Therefore, in absence of significant perturbating processes, the thermal gradients of salt-water bodies are positive and higher than those found in fresh waters.The coastal aquifer of the Salento peninsula occurs in carbonate rocks which owe their permeability to fracturing and karst processes. Because of this the aquifer is strongly anisotropic. The trend of iso-geothermal surface has been reconstructed for this aquifer based on the correlation of temperature logs along horizontal and vertical sections. The temperature proved to be an excellent tracer in the recognition of the main hydrogeological pathways and their interconnections, as well as in the identification of factors which strongly influence the evolutionary processes of salt-water contamination of fresh groundwaters.
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