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Runoff curve numbers for steep hillslopes with natural vegetation in semi-arid tropical highlands, northern Ethiopia

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Title Runoff curve numbers for steep hillslopes with natural vegetation in semi-arid tropical highlands, northern Ethiopia
 
Creator Descheemaeker, Katrien
Poesen, J.
Borselli, L.
Nyssen, Jan
Raes, Dirk
Haile, M.
Muys, B.
Deckers, J.
 
Subject RAINWATER
VEGETATION
 
Description Daily runoff from 27 plots (5 m × 2 m) recorded during two rainy seasons in the Tigray highlands (Ethiopia) were analysed together with daily rainfall to calculate runoff curve numbers for hillslopes covered by semi-natural vegetation in varying stages of vegetation restoration. Curve number model parameters were derived using a least squares fitting procedure on the collected rainfall-runoff datasets. Curve numbers varied from 29 to 97. Land use type was an important explanatory factor for the variation in curve numbers, whereas hydrologic soil group was not. Curve numbers were negatively correlated with vegetation cover. Taking into account antecedent soil moisture conditions did not improve runoff prediction using the curve number method. As runoff prediction was less accurate in areas with low curve numbers, two separate regression functions relating curve numbers with vegetation cover were proposed for different land use types.
 
Date 2010-08-02T13:29:07Z
2010-08-02T13:29:07Z
2008-03-20
 
Type Journal Article
 
Identifier Descheemaeker, K.; Poesen, J.; Borselli, L.; Nyssen, J.; Raes, D.; Haile, M.; Muys, B.; Deckers, J. 2008. Runoff curve numbers for steep hillslopes with natural vegetation in semi-arid tropical highlands, northern Ethiopia. Hydrological Processes 22(20):4097-4105.
https://hdl.handle.net/10568/2123
 
Language en
 
Source Hydrological Processes