Geochemistry and potential use of groundwater in the Rocca Busambra area (Sicily, Italy) |
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| Authors: | M Fontana F Grassa G Cusimano R Favara S Hauser C Scaletta |
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| Institution: | (1) Istituto Nazionale di Geofisica e Vulcanologia - Sezione di Palermo, Via La Malfa 153, 90146 Palermo, Italy;(2) Dipartimento di Geologia e Geodesia, Università di Palermo, Corso Tukory 131, 90134 Palermo, Italy;(3) Dipartimento di Chimica e Fisica della Terra, Università di Palermo, Via Archirafi 36, 90123 Palermo, Italy |
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| Abstract: | In the Rocca Busambra area (mid-west Sicily, Italy), from November 1999 to July 2002, 23 water points including wells and
springs were sampled and studied for their chemical and isotopic compositions. Two rain gauges were also installed at different
altitudes, and rainwater was collected monthly to determine the isotopic composition. The obtained results revealed the Rocca
Busambra carbonate complex as being the main recharge area on account of its high permeability value. From a chemical view
point, two main groups of water can be distinguished: calcium–magnesium–bicarbonate-type and calcium–magnesium–chloride–sulphate-type
waters. The first group reflects the dissolution of the carbonate rocks; the second group probably originates from circulation
within flyschoid sediments. Three water wells differ from the other samples due to their relatively high Na and K content,
which probably is to be referred to a marked interaction with the “Calcareniti di Corleone” formation, which is rich in glauconite
(K, Na)(Fe3+, Al, Mg)2(Si, Al)4O10(OH)2]. In accordance with WHO guidelines for drinking water (2004), almost all the samples collected can be considered drinkable,
with the exception of four of them, whose NO3
−, F− and Na+ contents exceed the limits. On the contrary, the sampled groundwater studied is basically suitable for irrigation. |
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| Keywords: | Water quality Environmental isotopes Geochemistry Italy |
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