GIS-based hydrological zones and soil geo-database of Ethiopia

Auteur(s) et Affiliation(s)

BERHANU, B.

Ethiopian Inst. of Water Resources (EIWR), Univ., Addis Ababa, Ethiopie

Dep. of Civil Engineering, Addis Ababa Inst. of Technology (AAiT), Addis Ababa, Ethiopie

MELESSE, A.M.

Dep. of Earth and Environment, Florida international Univ., Miami, Etats-Unis

SELESHI, Y.

Dep. of Civil Engineering, Addis Ababa Inst. of Technology (AAiT), Addis Ababa, Ethiopie

Description :
The AA. analyzed soils, topography and climatic data from over 1100 stations in Ethiopia. They setup a spatial model that uses rainfall, slope, evapotranspiration and runoff. Analysis based on a weighted overlay technique within ArcGIS using data from various sources and scales was conducted. A regression equation was used to develop the soil geo-database, scale factors of soil, land slope and climatic layers. An iterative analysis and expert knowledge was also used to determine the weights of the layers for the hydrological zoning. Results from this study provide valuable information about the hydrological zones of Ethiopia and an improved spatial soil database at 1:250,000 scale for the first time. Generated maps and zones will improve the hydrological understanding of the various regions of the country.

Type de document :
Article de périodique

Source :
Catena (Giessen), issn : 0341-8162, 2013, vol. 104, p. 21-31, nombre de pages : 11, Références bibliographiques : 44 ref.

Date :
2013

Editeur :
Pays édition : Allemagne, Cremlingen-Destedt, Catena

Langue :
Anglais