HOTSED:A new integrated model for assessing potential hotspots of sediment sources and related sediment dynamics at watershed scale  

作　　者：Manuel La Licata Alberto Bosino Seyed Hamidreza Sadeghi Mattia De Amicis Andrea Mandarino Andrea Terret Michael Maerker 

机构地区：[1]Department of Earth and Environmental Sciences,University of Pavia,Via Ferrata 1,27100,Pavia,Italy [2]Institute of Geosciences and Earth Resources,National Research Council of Italy,Via Ferrata 1,27100,Pavia,Italy [3]Department of Earth and Environmental Sciences,University of Milano-Bicocca,Piazza della Scienza 1,20126,Milano,Italy [4]Department of Watershed Management Engineering,Faculty of Natural Resources,Tarbiat Modares University,Noor,Mazandaran Province,Iran [5]Department of Earth,Environment,and Life Sciences,University of Genova,Corso Europa 26,16132,Genova,Italy [6]Geoscape Soc.Coop.,Geo-Environmental Consulting,Spin-Off of the University of Genova,Via Varese 2,16122,Genova,Italy [7]Consorzio di Bonifica di Piacenza,Strada Valnure 3,29122,Piacenza,Italy [8]Working Group on Soil Erosion and Feedbacks,Leibniz Centre for Agricultural Landscape Research(ZALF),Eberswalder Straße 84,15374,Müncheberg,Germany

出　　处：《International Soil and Water Conservation Research》2025年第1期80-101,共22页国际水土保持研究(英文)

基　　金：the financial support of the Earth and Environmental Sciences PhD-PON program(Research&Innovation,2014-2020,Education and research for recovery-REACT-EU,DOT1322534-4)of University of Pavia,Department of Earth and Environmental Sciences;the financial support of the RTDA-PON program(Research&Innovation 2014-2020,Education and research for recovery-REACT-EU,C6-G-32370-3),University of Milano-Bicocca,Department of Earth and Environmental Sciences;supported by the Belmont ABRESO project(https://www.belmontforum.org).

摘　　要：In this paper we introduce HOTSED,a novel,innovative GIS-based model designed for assessing potential hotspots of sediment dynamics at watershed scale.HOTSED integrates geomorphic spatial information with both structural and functional properties of connectivity.HOTSED provides a single and intuitive output that depicts the location of sediment source hotspots.Moreover,it enables the identification of“relative hazard”classes for sediment production and related effects.The general methodological framework is based on the initial elaboration of an Inventory Map(IM)of sediment-related landforms and processes,along with the implementation of a corresponding database.Subsequently,we used data stored in the IM to estimate the geomorphic Potential of Sediment Sources(PSS)through a relative scoring system.Furthermore,we computed Structural Sediment Connectivity(STC)and the Potential for Sediment Transport(PST)by combining terrain and hydrological parameters,vegetation roughness,and rainfall erosivity.Afterwards,PSS,STC,and PST components are integrated through a raster-based calculation method yielding the HOTSED model.We tested the HOTSED procedure in the upper Val d’Arda-Mignano watershed,which is a representative geomorphologically highly active Mediterranean area of the Northern Apennines(Italy).Through photointerpretation,terrain analysis,and fieldwork,we mapped sedimentrelated geomorphic features for a total of 4640 ha including:badlands and gullies(0.26%),rill-interrill erosion(15.03%),fluvial erosion(0.03%),landslides(70.06%),litho-structural erosional systems(0.87%),slope deposits(12.56%),and alluvial deposits(1.19%).HOTSED revealed hotspots with a very high hazard potential located near main channels or upstream of the reservoir.These areas are often linked with active landslides highly connected to the drainage system and frequently associated with other processes like bank erosion or surficial soil erosion.The model also highlighted linear hotspots corresponding to drainages flowing alongside or interse

关 键 词：Sediment sources identification Sediment connectivity Sediment dynamics assessment Integrated model Sediment-related hazard map 

分 类 号：P931[天文地球—自然地理学]