Document
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18th World IMACS Congress and MODSIM 2009 - International Congress on Modelling and Simulation: Interfacing Modelling and Simulation with Mathematical and Computational Sciences, Proceedings
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publication venue for: Comparison of landscape approaches to define spatial patterns of hillslope-scale sediment delivery ratio
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RDF description of Comparison of landscape approaches to define spatial patterns of hillslope-scale sediment delivery ratio - http://orbis.uaslp.mx/vivo/individual/scopus7618
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date: 2026-08-27T06:40:18
publisher: vivo
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Article
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Comparison of landscape approaches to define spatial patterns of hillslope-scale sediment delivery ratio
type: Thing
type: Article
has publication venue: 18th World IMACS Congress and MODSIM 2009 - International Congress on Modelling and Simulation: Interfacing Modelling and Simulation with Mathematical and Computational Sciences, Proceedings
type: Document
date time value: conference paper date 7619
abstract: A sediment delivery ratio (SDR) is that fraction of gross erosion that is transported from a given catchment in a given time interval. In essence, a SDR is a scaling factor that relates sediment availability and deposition at different spatial scales. In this paper, we focus on hillslope-scale SDR, i.e. the ratio of sediment produced from hillslopes to that delivered to the stream network. Factors that affect hillslope water movement, and thus entrainment or deposition of sediments, ultimately affecting the SDR, include upslope area, climate, topography, and soil cover. In erosion models, SDR is usually treated as a constant parameter. However, the use of spatially variable SDRs could improve the spatial prediction of the critical sources of sediment, i.e. identification of those areas directly affecting stream water quality. Such information would improve prioritisation of natural resource management effort and investment. Recent literature has described several landscape approaches to represent SDR variability in space, some of which account only for topography, whilst others consider topography and soil cover characteristics. The aim of this study was to evaluate four landscape approaches for their ability to depict spatial patterns of SDR in the Avon-Richardson catchment in the semi-arid Wimmera region (Victoria, South-east Australia). Erosion was assessed using a semi-distributed model (CatchMODS) with disaggregation based in subcatchments of around 40 km2 area. Hillslope gross erosion was assessed with a RUSLE approach. By applying the four landscape approaches using DEM and estimates of land use cover, four landscape index subcatchment distributions were calculated. These were normalised into standard distributions. Then, a sigmoid function was used to transform the standardised indices into SDR-index distributions ranging from zero to one. Finally, subcatchment SDRs were estimated as the product of the SDR-index by a whole-of-catchment SDR value that was est…
freetext keyword: CatchMODS; Connectivity; Landscape index; Sediment delivery ratio; Soil erosion; Spatial prioritisation Catchments; Deposition; Economics; Erosion; Estimation; Information management; Land use; Natural resources management; Runoff; Soils; Spatial distribution; Topography; Water quality; Constant parameters; Convergence approach; Natural resource management; Sediment availability; Sediment delivery ratio; Semi-distributed model; Standard distributions; Stream water quality; Sediments
most specific type: Document
type: Conference Paper
type: Generically Dependent Continuant
most specific type: Conference Paper
related by: authorship_48690
related by: authorship_48691
origen: scopus
page end: 4070
type: Information Content Entity
estado: published
page start: 4064
related by: authorship_48692
related by: authorship_48689
crisid: 7619
type: Continuant
related by: authorship_48688
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EI dscopus: 2-s2.0-85086266031

Information Content Entity
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Conference Paper
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