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Assessment of vulnerable zones to pollution caused by nitrate and sea water intrusion over an example of Apulia Region

Oueslati, Ines

Tesi o dissertazioni 2006

Résumé

The aim of this thesis is the implementation of a vulnerability assessment methodology of a zone to nitrate pollution and seawater intrusion. The Sinistra Bradano, situated on the western part of Taranto is the case study. Tools involved were: First, the DRASTIC model used with GIS to obtain the aquifer vulnerability map, characterized by high to very high vulnerability. Second, analyses were made on groundwater to measure nitrate and salinity concentrations and other water quality and soil fertility parameters. The maximum nitrate concentration detected didn.t exceed the limit of 50 mg/l. Finally, the ISAREG model through which, by generating irrigation schedule simulations, a groundwater exploitation map was built. A correlation between over pumping and high salinity was noted on the right side of the zone. Therefore, recommendations were proposed.