Selecting best mapping strategies for storm runoff modeling in a mountainous semi-arid area

Auteur(s) et Affiliation(s)

SANCHEZ-MORENO, J.F.

Dept. of Earth System Analysis, Fac. of Geo-Information Science and Earth Observation (ITC), Univ. of Twente, Enschede, Pays-Bas

JETTEN, V.

Dept. of Earth System Analysis, Fac. of Geo-Information Science and Earth Observation (ITC), Univ. of Twente, Enschede, Pays-Bas

MANNAERTS, C.M.

Dept. of Water resources, Fac. of Geo-Information Science and earth Observation (ITC), Univ. of Twente, Enschede, Pays-Bas

DE PINA TAVARES, J.

National Inst. of Agrarian Research of Cap Verde, Praia, Cap-Vert

Description :
The study area was Ribeira Seca, a 90 km2 catchment located in Santiago Island, Cape Verde (West Africa), a semi-arid country subject to scarce but extreme rainfall during the short tropical summer monsoon. To evaluate the influence of rainfall on runoff and erosion, 2 storm events with different intensity and duration were considered. Ordinary kriging (OK) and kriging with external drift (KED) inputs produced similar results, with the latter being closer to the observed hydrographs. The highest soil losses were obtained with KED. To improve the results of soil loss predictions, higher accurate spatial information on the processes is needed; however, spatial information of input soil properties alone is not enough in complex landscapes. The results demonstrate the importance of selecting the appropriate mapping strategy to obtain reliable runoff and erosion estimates.

Type de document :
Article de périodique

Source :
Earth surface processes and landforms, issn : 0197-9337, 2014, vol. 39, n°. 8, p. 1030-1048, nombre de pages : 19, Références bibliographiques : 1 p.

Date :
2014

Editeur :
Pays édition : Royaume-Uni, Chichester, Wiley

Langue :
Anglais