CARATTERIZZAZIONE GEOLOGICO-GEOMORFOLOGICA DEL CORSO DEL F. METAURO (PU, MARCHE) FINALIZZATA ALLA VALUTAZIONE DEL TRASPORTO SOLIDO.

The increase in intense weather and climatic events together with the anthropogenic pressure induce in the streams an imbalance in the overall river system. From a physical point of view this results in an increase in solid transport with a consequent intensification in potential hydraulic risks. The study discusses the fluvial dynamic evolution of the Metauro River (Central Apennine Hydrographic District, Marche, Italy) and the importance of monitoring solid transport in the riverbed with particular attention to the identification of source areas and material mobility. The River Metauro has a drainage area of 1043.6 km2, has minimum discharges of 2 m3/s and maximum discharges of 1100 m3/s. The runoff times is 14.3 h; the main tributaries are Candigliano, Bosso and Burano. With the support of GIS software (QGIS and ArcGIS), an initial assessment was done with the creation of a map of the Stream LengthGradient Index to interpret the changes of riverbed longitudinal profiles at steady-state conditions in relation to local geomorphology and sediment variation. A second map defining the susceptibility of the basin to erodibility was obtained. The study is still under development, and the methodology will involve the use of direct and indirect methods for material quantification and distribution and sampling for chemical and physical analysis.