Jo De Waele (*), Mario L.V. Martina (*), Laura Sanna (**), Antonello Cossu (***) & Salvatore Cabras (°)
(*) Department of Earth Science, University of Bologna, Italy. E-mail: jo.dewaele@unibo.it; mario.martina@unibo.it
(**) Water Resources and Environmental Geology Research Group, University of Almeria, Spain. E-mail: lsanna@ual.es
(***) Sardinian Environmental Protection Agency, Sassari, Italy.
(°) Associazione Speleologica Progetto Supramonte, Cagliari, Italy.