In Central Italy the meteorological data indicate that during the last one hundred years there was a slight increase in temperature and a decrease in rainfall; some extrapolations for the next 50 years, assuming that climatic trend will continue, show a likely water surplus decrease of about 20%. In the Umbria-Marche Apennines, mountain springs are the main sources of drinkable water. The springs used for water supply are fed - in general – by aquifers connected also to a deeper, regional, flow. The quality of the water supplied by the springs connected to the “local” flow is usually much better than that of the regional flow, most of which goes to feed vulnerable alluvial aquifers or large springs having salty water. In order to understanding the possible effects of climatic variations on the high quality local flow, a typical hydrogeological system was modelled. The model gave quantitative information on the behavior of the system under different recharge conditions, showing that the local flow would be much more affected than the regional flow by a reduction in recharge.
Strategic groundwater resources in Central Italy: climatic changes and risk of depletion
CAMBI, Costanza;
2001
Abstract
In Central Italy the meteorological data indicate that during the last one hundred years there was a slight increase in temperature and a decrease in rainfall; some extrapolations for the next 50 years, assuming that climatic trend will continue, show a likely water surplus decrease of about 20%. In the Umbria-Marche Apennines, mountain springs are the main sources of drinkable water. The springs used for water supply are fed - in general – by aquifers connected also to a deeper, regional, flow. The quality of the water supplied by the springs connected to the “local” flow is usually much better than that of the regional flow, most of which goes to feed vulnerable alluvial aquifers or large springs having salty water. In order to understanding the possible effects of climatic variations on the high quality local flow, a typical hydrogeological system was modelled. The model gave quantitative information on the behavior of the system under different recharge conditions, showing that the local flow would be much more affected than the regional flow by a reduction in recharge.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
