مورفولوجية المنحدرات في الجزء الأعلى من حوض الرميمين و حوض تكالا دراسة في الجيومورفولوجية المناخية : دراسة في الجيومورفولوجية المناخية

الملخص EN

The hillslopes may be considered as one of the most important geomorphological systems because they are very sensitive to any environmental change and reflect the geological, climatic and hydrological characteristics.

Therefore, this study discusses the properties of such morphological hillslopes and their development in two different climatic territories (regional).

Twelve slope profiles were surveyed by Abney level, and Theodolite apparatus, Markers, tape and Prismatic compass.

The twelve profiles are divided equally by the Rumeimine and Takala.

Measurements were taken (distance and angle) at the morphological interruption.

The slope angles were also analyzed.

Moreover, the curve angles, curve fitting and the slope development were also analyzed.

The study shows how the climatic circumstances can affect the geomorphological processes and the hillslopes forms in the aforementioned catchments, such as the steep slopes in Tekala (average: 26.53)ْ and the moderate slopes in the Rumeimine (average 10.33)ْ The slopes angles rotate between 4 tْo 18 in the Rumeinine but they rotate between 18 to 30 iْn Tekala.

The convex elements constitute more than 80% and 40% from the total lengths of the profiles in both Tekala and the Rumeimine respectively.

The concave elements increase in the Rumeimine forming about 40%.

The curvature angles (convex, concave) also increase in Tekala ( 33.7 % from the lengths of the profiles).

The gentle degrees of curvature dominate in the Rumeimine (63.9% from the lengths of the profiles).

The slopes profiles could be classified in Tekala into two groups whereas the hillslopes in the Rumeimine were divided into three groups.

Each of these groups has its specific morphological properties.

The results of the study and analysis evidently suggest that the slopes in the two catchments develop according to the parallel retreat theory.