Runoff curve numbers for steep hillslopes with natural vegetation in semi-arid tropical highlands, northern Ethiopia
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.
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Language: | English |
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Wiley
2008-09-30
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Subjects: | rainwater, vegetation, |
Online Access: | https://hdl.handle.net/10568/2123 https://doi.org/10.1002/hyp.7011 |
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dig-cgspace-10568-21232023-12-27T19:30:10Z Runoff curve numbers for steep hillslopes with natural vegetation in semi-arid tropical highlands, northern Ethiopia Descheemaeker, Katrien Poesen, J. Borselli, L. Nyssen, Jan Raes, Dirk Haile, M. Muys, B. Deckers, J. rainwater vegetation 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. 2008-09-30 2010-08-02T13:29:07Z 2010-08-02T13:29:07Z Journal Article 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. 0885-6087 1099-1085 https://hdl.handle.net/10568/2123 https://doi.org/10.1002/hyp.7011 en Copyrighted; all rights reserved Limited Access p. 4097-4105 Wiley Hydrological Processes |
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rainwater vegetation rainwater vegetation Descheemaeker, Katrien Poesen, J. Borselli, L. Nyssen, Jan Raes, Dirk Haile, M. Muys, B. Deckers, J. Runoff curve numbers for steep hillslopes with natural vegetation in semi-arid tropical highlands, northern Ethiopia |
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. |
format |
Journal Article |
topic_facet |
rainwater vegetation |
author |
Descheemaeker, Katrien Poesen, J. Borselli, L. Nyssen, Jan Raes, Dirk Haile, M. Muys, B. Deckers, J. |
author_facet |
Descheemaeker, Katrien Poesen, J. Borselli, L. Nyssen, Jan Raes, Dirk Haile, M. Muys, B. Deckers, J. |
author_sort |
Descheemaeker, Katrien |
title |
Runoff curve numbers for steep hillslopes with natural vegetation in semi-arid tropical highlands, northern Ethiopia |
title_short |
Runoff curve numbers for steep hillslopes with natural vegetation in semi-arid tropical highlands, northern Ethiopia |
title_full |
Runoff curve numbers for steep hillslopes with natural vegetation in semi-arid tropical highlands, northern Ethiopia |
title_fullStr |
Runoff curve numbers for steep hillslopes with natural vegetation in semi-arid tropical highlands, northern Ethiopia |
title_full_unstemmed |
Runoff curve numbers for steep hillslopes with natural vegetation in semi-arid tropical highlands, northern Ethiopia |
title_sort |
runoff curve numbers for steep hillslopes with natural vegetation in semi-arid tropical highlands, northern ethiopia |
publisher |
Wiley |
publishDate |
2008-09-30 |
url |
https://hdl.handle.net/10568/2123 https://doi.org/10.1002/hyp.7011 |
work_keys_str_mv |
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