The deposits of the Colli Albani volcano costitute a hydrogeological unit with well-defined no-flow boundaries (Colli Albani Hydrogeological Unit – CAHU). CAHU discharge variations have been highlighted by comparing 1978-1982 hydrogeological surveys with those of 1997-1999. Over mapping the isopiezometric contour maps relative to the two periods reveals a major depletion of the water table. An assessment of the total discharge of CAHU groundwaters into rivers for the same periods has been calculated as 4800 and 2500 l/s, respectively. Changes to the hydrogeological equilibrium of CAHU over the past 20 years have induced: i) a lowering of the water level in the Albano and Nemi lakes; ii) a decreased discharge of the periennial rivers; iii) a generalizated drawdown in the regional and perched aquifers. The depletion of these water resources is to be ascribed mainly to the increase in water extraction recorded over the last two decades.
Capelli, G., GIORDANO G., C.A., DE RITA, D., Salvati, R. (2000). The Colli Albani Volcano (Rome – Italy): equilibrium breakdown of a hydrogeological units as a result of unplanned and un controlled over-exploitation. HYDROGEOLOGIE, 4, 63-70.
The Colli Albani Volcano (Rome – Italy): equilibrium breakdown of a hydrogeological units as a result of unplanned and un controlled over-exploitation
CAPELLI, Giuseppe;
2000-01-01
Abstract
The deposits of the Colli Albani volcano costitute a hydrogeological unit with well-defined no-flow boundaries (Colli Albani Hydrogeological Unit – CAHU). CAHU discharge variations have been highlighted by comparing 1978-1982 hydrogeological surveys with those of 1997-1999. Over mapping the isopiezometric contour maps relative to the two periods reveals a major depletion of the water table. An assessment of the total discharge of CAHU groundwaters into rivers for the same periods has been calculated as 4800 and 2500 l/s, respectively. Changes to the hydrogeological equilibrium of CAHU over the past 20 years have induced: i) a lowering of the water level in the Albano and Nemi lakes; ii) a decreased discharge of the periennial rivers; iii) a generalizated drawdown in the regional and perched aquifers. The depletion of these water resources is to be ascribed mainly to the increase in water extraction recorded over the last two decades.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
