الفهرس 
IntroductionOnly 14 pages are availabe for public view
 |  | from | 125 |  |  |
| | | from | 125 | | |
Abstract
This work was carried out at five chosen transects; in north Sinai , Rafah, El-Sheik Zwied, Sakaska, El-Bardawiel and Bir El-Abd during the period from 2009 to 2010 to study the morphological movements of sandy dunes and the seasonal changes in natural vegetation which grown in the three dune parts ; namely windward, crest and leeward during spring and autumn seasons and its relation with the climatic parameters .
The main obtained results were as follow:-
I. Sand dunes study :-
1. The five transects were similar in morphology of the dunes ranging from compound to complex.
2. The dune movements differed according to the transect. Annual movement reached 3.5 meter per year in Sakaska in the first location, while in El-Bardawiel the sandy dunes movement was 6.5 meter per year in the first location.3. Dominant soils grain size of studied sand dune differed from fine to medium according to the studied transect.4. The annual resultand drift potential(RDP) at the study area was relatively low and ranged from 26 to 103.3 vu. 5. The mean grain size grates at Rafah, Sakaska and El- Bardawiel ranged from fine to medium whereas at El- Sheik Zwied was fine and Bir El-Abd was medium sand.6.Sorting of Rafah was the best ranging from 0.13- 0.42 a scored the highest frequency. 7. The obtained results showed that sediments were symmetrical and skewnees values ranged from 0.06 to 0.35 which indicate nearly skewed to strongly fine skewed.8. Artemisia monosperma was the dominant plant species grown in the three parts of dune in Sakaska transect while Cornulaca moncantha,Pancium turgidum were the dominant ons in El-bardawiel transect.