Rendiconti Online della Società Geologica Italiana - Vol. 63/2024

Silting estimation of the Farneto del Principe (Calabria, South Italy) artificial reservoir by means of the EPM model

Flaubert Nguebiapssi Kembeu1,2, Gianpietro Imbrogno1,2, Nadia Penna3, Domenico Ferraro3, Mariano Tenuta4, Maria De Filpo5, Giuseppe Cianflone1,2 & Rocco Dominici1,2
1Department of Biology, Ecology and Earth Sciences, University of Calabria, Rende, Italy.
2E3 Earth, Environment, Engineering spin-off, University of Calabria, Via Ponte Bucci.
3Department of Civil Engineering, University of Calabria, Rende, Italy.
4Department of Innovation and Information Engineering, Guglielmo Marconi University, Roma, Italy.
5Department of Territory and Environmental Protection, Calabria Region, Catanzaro, Italy.
6Consortium for the integral reclamation of the Cosentino Ionian basins, Trebisacce (CS), Italy.
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Volume: 63/2024


In the present paper, the average annual silting of the Farneto del Principe artificial reservoir was estimated through the potential erosion model (EPM) in a GIS environment over a time range from 1991 to 2008. Four calculations were performed, the first by giving a value of the geo-lithological soil erodibility factor based on the table proposed in literature and three others by using different calibration methods (geomechanical, petrographic and granulometric). For each calculation, the net sediment volume arriving at the closing session was calculated. The net sediment volume values obtained have been compared with the average value of the siltation measured using the echo-sounder survey. It was noted that last three calculations show an overestimation of the silting of values of 45% for geomechanical calibration, 4% for petrographic calibration and 3% for granulometric calibration. Probable causes for this overestimation could be: i) the presence of the Esaro artificial lake at the closure section of the Farneto basin; ii) the fact that the EPM model incorporates in the net sediment volume value estimated part of the sediment trapped by infrastructures (bridges, waterfalls, etc.) along the river as no corrections are made for these during the appropriate calculation procedure. Although there are several overestimates, the results of the study show how the petrographic and granulometric calibrations proved to be better as they are closer to the real value of the silting.


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