Abstract

The aim of this research study the impact of wind erosion in the variety and intensity of natural vegetation in the east Razzazah region, for this reason we selected an transect with long 30km and 3km width, three locations for sampling at a distance of 0, 15 and 30km (1, 2, and 3) along the transect were selected, lost soil by wind was measured at every sampling point with World Erosion Equation (WEQ), addition to quantity and quality analysis for natural vegetation. Results of predicting erosion reached 89.5, 92.9 and 100.0 Meg. ha-1. year-1 at location 1, 2 and 3 respectively, which point to present severe erosion in the area with average 94.1 Meg. ha-1. year-1, because the higher percent for fine sand and silt also the weak structure for soil, addition to dry climate predominant with speedy wind and weak vegetation cover, all these factors have clear effect to increasing erosion quantity in the studied locations. At location 1 the perennial species reached 70% in compared to annual species 30% , higher percentage at perennial species was 21.7% for Haloxybn salicornicum Boiss but for annual species 9.9% was recorded for Diplotaxis harra Boiss, second location 2 both perennial and annuals species showed similar percentage 50%, higher percent for perennial species recorded to Atriplex halimus L. and Haloxybn salicornicum Boiss 12.9%, however the annual species Neotorularia torulesa Hedge showed higher percent 6.45%, while at 3 location the perennial species form 40% in comparison to annual species which formed 60% Haloxybn salicornicum Boiss have the higher percent 7.5% however annual species showed Neotorularia torulesa Hedge the dominant with 7.5%. The results showed clear effect for erosion intensity on distribution and density of natural vegetation in the region.