A Note on Impact of Vetiver Hedges on Intensity of Wind Erosion in North Atbara, River Nile State, Sudan

Motasim Hyder Abdelwahab, Mukhtar Ahmed Mustafa, Eltayeb Elhag Ali

Abstract


A field experiment was conducted on a bare land at Aboharaz
village about 36 km north Atbara in the River Nile State to collect data
base in one season (October 2008- February 2009). The intensity of wind
erosion (IWE) was measured monthly in four directions, namely West
(W), North West (NW), North (N) and North East (NE) using vertical
(IWEv) and horizontal soil traps (IWEh). Vetiver (Vetiveria zizanioides)
hedgs were established in the experimental site, reduced the seasonal
variation of soil erosion by both types of traps and significantly reduced
the IWE by an average of 20.9%.

The River Nile State is dominated by hyper–arid and arid climatic zones.
The mean annual rainfall is less than 100 mm. Winds prevail from the
north with a mean maximum speed of 17.6 km/hr. (Izzeldin and Ahmed,
2004). Under such climatic conditions wind erosion is the predominant
desertification process. Vetiver (Vetiveria zizanioides) has excellent
characteristics, such as deep, extensive, penetrating root system and
strong adaptability to adverse conditions. Thus, it is a very ideal plant for
soil and water conservation and erosion control. It could form hedges


Keywords


Intensity of wind erosion; vetiver; sand traps.

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