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Assessment of gully erosion using photogrammetric techniques. A case study of upper Mbuluzi river, Swaziland

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dc.contributor.authorPelacani, S.
dc.contributor.authorMärker, M.
dc.contributor.authorRodolfi, G.
dc.date.accessioned2018-02-21T10:34:06Z
dc.date.available2018-02-21T10:34:06Z
dc.date.issued2007
dc.descriptionResumen del trabajo presentado al IV International Symposium on Gully Erosion, celebrado en la Universidad Pública de Navarra del 17 al 19 de septiembre de 2007.es_ES
dc.description.abstractSwaziland is severely affected by gully erosion contributing to a sediment budget up to 250,000 m3 y-1 (WMS Associates, 1988). This type is more important than inter-rill and rill erosion. Severe gully erosion is mainly in the Middleveld especially on communal land highly populated (43.65 inhabitants km-2) and with high livestock concentrations. Here, the calculated carrying capacities are 0.27 LSU ha-1 (Livestock Units) vs. stocking rates 0.87 LSU ha-1. In general, to assess gully erosion, numerous investigators have made use of aerial photos and GIS to predict the morphometric conditions that favoured gulling (Nachtergaele and Poesen, 1999). In Swaziland, from 1947 to 1987, the WMS Associates (1988) established gully erosion rates from aerial stereo photos. Subsequently, Mushala et al., 1994 analyzed the gullies distribution and their relationship to lithology and land tenure. In the present research long terms rates of gully erosion have been measured by aerial photos taken from 1947 to 1996. Particular attention was focused on two dendritic gully systems. One of them is dynamically evolving, whereas the other one is in a static phase (Sidorchuk, 1999). The objectives of this research were to calculate the historical development of the morphology of gully as input data to the gully erosion model (Sidorchuk et al., 2001) and to predict hillslope area susceptible to gulling. A High Digital Terrain Models (HDTMs) with 1-m resolution were devised for this purpose.en
dc.description.sponsorshipPart of this work was supported by the European Union, INCO-DC, contract nr. IC18-CT97-0144.en
dc.format.extent2 p.
dc.format.mimetypeapplication/pdfen
dc.identifier.isbn978-84–9769-198-7
dc.identifier.urihttps://academica-e.unavarra.es/handle/2454/27423
dc.language.isoengen
dc.publisherUniversidad Pública de Navarra / Nafarroako Unibertsitate Publikoaes
dc.relation.ispartofJavier Casalí, Rafael Giménez (eds.): Progress in Gully Erosion Research. IV International Symposium on Gully Erosion. September 17-19, 2007. Pamplona, Spain. Pamplona: Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2007es_ES
dc.rights© Autores; Universidad Pública de Navarra. Esta publicación no puede ser reproducida, almacenada o transmitida total o parcialmente, sea cual fuere el medio y el procedimiento, incluidas las fotocopias, sin permiso previo concedido por escrito por los titulares del copyright.es_ES
dc.rights.accessRightsinfo:eu-repo/semantics/openAccess
dc.subjectGully erosionen
dc.subjectMbuluzi river (Swaziland)en
dc.titleAssessment of gully erosion using photogrammetric techniques. A case study of upper Mbuluzi river, Swazilanden
dc.typeinfo:eu-repo/semantics/conferenceObject
dc.type.versioninfo:eu-repo/semantics/publishedVersionen
dc.type.versionVersión publicada / Argitaratu den bertsioaes
dspace.entity.typePublication

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Progress in gully erosion research: IV International Symposium on Gully Erosion