Your search found 3 records
1 Nyssen, J.; Haile, M.; Descheemaeker, K.; Deckers, J.; Poesen, J.; Moeyersons, J.; Hailemariam, T. 2003. Promoting global watershed management towards rural communities: the May Zeg-zeg initiative. In McCornick, P. G.; Kamara, A. B.; Tadesse, G. (Eds). Integrated water and land management research and capacity building priorities for Ethiopia: proceedings of a MoWR/EARO/IWMI/ILRI International Workshop held at ILRI, Addis Ababa, Ethiopia, 2-4 December 2002. Nairobi, Kenya: International Livestock Research Institute (ILRI); Colombo, Sri Lanka: International Water Management Institute (IWMI); Addis Ababa, Ethiopia: Ethiopian Ministry of Water Resources; Addis Ababa, Ethiopia: Ethiopian Agricultural Research Organization. pp.192-195.
(Location: IWMI-HQ Call no: IWMI 333.91 G636 MCC Record No: H032462)
2 Nyssen, J.; Poesen, J.; Descheemaeker, Katrien; Haregeweyn, N.; Haile, M.; Moeyersons, J.; Frankl, A.; Govers, G.; Munro, N.; Deckers, J. 2008. Effects of region-wide soil and water conservation in semi-arid areas: the case of northern Ethiopia. Zeitschrift für Geomorphologie, 52(3):291-315.
Soil conservation ; Water conservation ; Highlands ; Erosion ; Bunds ; Reservoirs ; Sedimentation / Ethiopia / Tigray
(Location: IWMI HQ Call no: e-copy only Record No: H041844)
(0.94 MB)
Studies on the impacts of environmental rehabilitation in semi-arid areas are often conducted over limited space and time scales, and do typically not include detailed biophysical components. This study makes a multi-scale assessment over a time span of 30 years of environmental rehabilitation in one of the world's most degraded areas: the Tigray highlands of Northern Ethiopia. The study shows that in Tigray sheet and rill erosion rates have decreased by approximately 68%, infiltration and spring discharge are enhanced and vegetation cover has improved. These impacts are evidenced and quantified by a comprehensive comparison of the current landscape with a coverage of 30-year old photographs and substantiated by field investigations. The positive changes in ecosystem service supply that result from these conservation activities in the Tigray highlands are an issue of global concern.
3 Nyssen, J.; Clymans, W.; Descheemaeker, Katrien; Poesen, J.; Vandecasteele, I.; Vanmaercke, M.; Zenebe, A.; Van Camp, M.; Haile, M.; Haregeweyn, N.; Moeyersons, J.; Martens, K.; Gebreyohannes, T.; Deckers, J.; Walraevens, K. 2010. Impact of soil and water conservation measures on catchment hydrological response: a case in north Ethiopia. Hydrological Processes, 24(13):1880-1895. [doi: https://doi.org/10.1002/hyp.7628]
Catchment areas ; Water conservation ; Soil conservation ; Hydrology ; Runoff ; Water table ; Measurement ; Water balance / Ethiopia
(Location: IWMI HQ Call no: e-copy only Record No: H042876)
(0.59 MB)
Impact studies of catchment management in the developing world rarely include detailed hydrological components. Here, changes in the hydrological response of a 200-ha catchment in north Ethiopia are investigated. The management included various soil and water conservation measures such as the construction of dry masonry stone bunds and check dams, the abandonment of post-harvest grazing, and the establishment of woody vegetation. Measurements at the catchment outlet indicated a runoff depth of 5 mm or a runoff coefficient (RC) of 1Ð6% in the rainy season of 2006. Combined with runoff measurements at plot scale, this allowed calculating the runoff curve number (CN) for various land uses and land management techniques. The pre-implementation runoff depth was then predicted using the CN values and a ponding adjustment factor, representing the abstraction of runoff induced by the 242 check dams in gullies. Using the 2006 rainfall depths, the runoff depth for the 2000 land management situation was predicted to be 26Ð5 mm (RC D 8%), in line with current RCs of nearby catchments. Monitoring of the ground water level indicated a rise after catchment management. The yearly rise in water table after the onset of the rains ( T) relative to the water surplus (WS) over the same period increased between 2002–2003 ( T/WS D 3Ð4) and 2006 ( T/WS >11Ð1). Emerging wells and irrigation are other indicators for improved water supply in the managed catchment. Cropped fields in the gullies indicate that farmers are less frightened for the destructive effects of flash floods. Due to increased soil water content, the crop growing period is prolonged. It can be concluded that this catchment management has resulted in a higher infiltration rate and a reduction of direct runoff volume by 81% which has had a positive influence on the catchment water balance.
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