We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
MONTE LAGO POLJE, A CASE STUDY REGARDING THE INFLUENCE OF GEOLOGIC STRUCTURE AND DEGREE OF KARSTFICATION ON GROUNDWATER DRAINAGE IN THE CENTRAL APENNINES (ITALY).
- Authors
GALDENZI, Sandro
- Abstract
Research on the cave and karst water in the area of Monte Lago polje (Central Apennines) has revealed an articulate drainage pathway, influenced by the karstfication degree and geological setting. A fast drainage occurs from the ponor in the polje to the main temporary resurgence in the valley of San Giovanni, impeding the karst water in achieving thermal equilibrium with the rock. The water temperature in the resurgence decreases to very low values (~3 °C) during the winter, and the daily thermal cycles are clearly recognizable. These inputs of vadose water from the ponor have only a minor influence on the chemo-physical characteristics of San Giovanni spring, the largest emergence in the area, located a few hundred meters downstream in the same valley and fed by the main basal aquifer. The two nearby springs are recharged by different hydrostructures divided by low permeability levels in the Jurassic carbonate succession. This reduces the cross-formational communication mainly for the descending vadose fluxes. The fast drainage of karst water in the transfer vadose zone is due to a high karstfication, confirmed by the typology and distribution of the karst caves. A more regular discharge in the springs fed by the basal aquifer is probably related to a minor karstfication in the lower part of the limestone massifs.
- Subjects
APENNINES (Italy); GEOLOGICAL formations; KARST; GROUNDWATER monitoring; HYDROGEOLOGY; CAVES
- Publication
Acta Carsologica, 2019, Vol 48, Issue 1, p99
- ISSN
0583-6050
- Publication type
Article
- DOI
10.3986/ac.v48i1.6872