title: Semi-quantitative method for the assessment of debris supply from slopes to river in ungauged catchments.
abstract: This paper presents an integrated empirical methodology for assessing the amount of sediment transported from slopes to the main river in absence of a sediment transport monitoring system. The amount of transported sediment is calculated through the characterization of the sediment source areas including the identification of the slope phenomena responsible for the sediment propagation to the main river: shallow landslides, channelized debris flows and deep-seated rotational slides. On this basis, several scenarios related to the climatic conditions are defined: they indicate the number of possible slope phenomena and potential volumes of mobilized unconsolidated material from sediment source areas to the main river. This methodology was finalized and tested in the Maira River basin (south-western Italian Alps) with quite good results.
authors.affiliation: Department of Forecasting Systems, Regional Agency for Environmental Protection of Piedmont, Turin, Italy. Electronic address: davide.tiranti@arpa.piemonte.it.
authors.forename: Davide
authors.initials: D
authors.lastname: Tiranti
authors.affiliation: National Research Council, Research Institute for Geo-Hydrological Protection, Padua, Italy.
authors.forename: Marco
authors.initials: M
authors.lastname: Cavalli
authors.affiliation: National Research Council, Research Institute for Geo-Hydrological Protection, Padua, Italy.
authors.forename: Stefano
authors.initials: S
authors.lastname: Crema
authors.affiliation: Sector for Territorial Geological Risk Prevention, Regione Piemonte, Cuneo, Italy.
authors.forename: Marina
authors.initials: M
authors.lastname: Zerbato
authors.affiliation: Department of Forecasting Systems, Regional Agency for Environmental Protection of Piedmont, Turin, Italy.
authors.forename: Maria
authors.initials: M
authors.lastname: Graziadei
authors.affiliation: Department of Forecasting Systems, Regional Agency for Environmental Protection of Piedmont, Turin, Italy.
authors.forename: Secondo
authors.initials: S
authors.lastname: Barbero
authors.affiliation: Department of Forecasting Systems, Regional Agency for Environmental Protection of Piedmont, Turin, Italy.
authors.forename: Roberto
authors.initials: R
authors.lastname: Cremonini
authors.affiliation: Sector for Territory Defence, Regione Piemonte, Turin, Italy.
authors.forename: Chiara
authors.initials: C
authors.lastname: Silvestro
authors.affiliation: Sector for Territory Defence, Regione Piemonte, Turin, Italy.
authors.forename: Giulia
authors.initials: G
authors.lastname: Bodrato
authors.affiliation: Taiga s.r.l., Turin, Italy.
authors.forename: Francesco
authors.initials: F
authors.lastname: Tresso
keywords: Debris flow; Landslide; Sediment cascade; Sediment source area; Western Italian Alps