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Topography and hydrology modeling and influence on soil erosion simulation, at small basin scale

2024Preprint Restricted access
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dc.contributor.authorDuarte, A.C.
dc.contributor.authorFerreira, Carla
dc.contributor.authorVitali, Giuliano
dc.date.accessioned2024-02-16T11:06:13Z
dc.date.available2024-02-16T11:06:13Z
dc.date.issued2024
dc.description.abstractDiffuse pollution from agricultural activities is a major environmental problem. The extent of the impacts is driven, e.g., by local topography due to the influence on hydrological processes. This study aims to investigate the use of different scale topographic data in assessing runoff-erosion processes. The TopAGNPS module, a component of the AnnAGNPS model (Annualized Agriculture Nonpoint Source), was used to assess the impact of the vertical resolution of the Digital Elevation Model (DEM) on the topographic and hydrological configuration of a basin, and on the simulation of soil erosion. The study focuses on a small agro-forestry basin (190 ha) located in the municipality of Idanha-a-Nova, Portugal. A georeferenced survey of the basin's surface drainage network was carried out and then compared with the results of the simulated drainage networks generated by the TopAGNPS module using two DEMs with vertical resolutions of 1m and 5m. The results show that the DEM with a vertical resolution of 5m did not generate a reliable drainage network, given the relevant differences between the modelled network and the field observations. On the other hand, the drainage network generated with the DEM of 1m resolution was very similar to the observed drainage network. The use of distinct topographic configurations modelled based on different vertical resolution DEMs on the estimation of soil erosion by water using the RUSLE model (Revised Universal Soil Loss Equation), resulted in significant differences considering the values of 5.85 and 4.17 ton/ha.year for the DEM with 1m and 5m vertical resolution, respectively. Considering that soil erosion by water and other processes, such as the transport of pollutants, are distributed processes, it is of great relevance to consider good topographic and hydrologic configurations to achieve more reliable simulations and better support decision-making.pt_PT
dc.description.versioninfo:eu-repo/semantics/acceptedVersionpt_PT
dc.identifier.citationDUARTE, A.C. ; FERREIRA, C. ; VITALI, G. (2024) - Topography and hydrology modeling and influence on soil erosion simulation, at small basin scale. In the Mediterranean Geosciences Union Annual Meeting 2023 - Proceedings. SPRINGER (Artigo aceite para publicação).pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.11/8854
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherSpringerpt_PT
dc.subjectDigital Elevation Modelpt_PT
dc.subjectData resolutionpt_PT
dc.subjectAnnAGNPS modelpt_PT
dc.subjectSoil erosionpt_PT
dc.subjectAgroforestry basinpt_PT
dc.titleTopography and hydrology modeling and influence on soil erosion simulation, at small basin scalept_PT
dc.typepreprint
dspace.entity.typePublication
oaire.citation.titleMediterranean Geosciences Union Annual Meeting 2023pt_PT
person.familyNameCANATÁRIO DUARTE
person.familyNameSantos Ferreira
person.givenNameANTÓNIO
person.givenNameCarla Sofia
person.identifierhttps://scholar.google.com/citations?view_op=list_works&hl=pt-PT&user=8HqFxygAAAAJ
person.identifier.ciencia-id0717-AB48-E1A3
person.identifier.ciencia-idFB1C-CAFF-6791
person.identifier.orcid0000-0002-0319-378X
person.identifier.orcid0000-0003-3709-4103
person.identifier.scopus-author-id54901177900
person.identifier.scopus-author-id55416288100
rcaap.rightsrestrictedAccesspt_PT
rcaap.typepreprintpt_PT
relation.isAuthorOfPublicationff1ed167-3f68-4e2b-b092-aaa0eb28ae6b
relation.isAuthorOfPublicationbc9267a1-5d6c-47c8-802d-ac1579cfe4e1
relation.isAuthorOfPublication.latestForDiscoveryff1ed167-3f68-4e2b-b092-aaa0eb28ae6b

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