TRASPORTO SOLIDO IN SOSPENSIONE IN UN TORRENTE MEDITERRANEO (CELONE, PUGLIA). Metodologie di calcolo a confronto

In the Mediterranean region, suspended sediment transport is the predominant process of material removal and sediment transport. The aim of this paper is to analyze the sediment dynamics and to compare different calculation methods in order to identify the most suitable for temporary rivers. At this purpose, continuous measurements of the flow and discrete values of sediment concentrations recorded from 2010 to 2011 have been used. Sampling was carried out with different frequencies as a function of the flow conditions. Several calculation methods were compared: Averaging Estimator Methods, Ratio Estimator Methods e Regression Estimator Methods. The suspended sediment load was estimated in the range of 141-1123 tkm-2yr-1. Applying a flow regime Stratification based on a flow exceeded frequency (f1<20%; 20%80%), the range of values was found in a restricted interval 298-595 tkm-2yr-1. Results show that the stratification approach is necessary methodology in load fluxes estimation in temporary rivers.