تقدير حجم التعرية والترسيب في حوض والدي بيداوة باستخدام نموذج (GCD) دراسة في الجيومورفولوجيا التطبيقية

د.  دلوفان رمضان اسماعيل; د. شمال احمد امين

doi:10.31185/wjfh.Vol20.Iss4.571

Authors

Dr. Dilovan Ramadhan Ismail Department of Geography / College of Humanities Author
Dr. Shamal ahmed ameen Department of Geography / College of Humanities Author

DOI:

https://doi.org/10.31185/wjfh.Vol20.Iss4.571

Keywords:

geomorphic change detection, DEM, erosion and sedimentation volume, GIS

Abstract

The aim of this study is to estimate the extent of erosion and sedimentation in the Baidoa Basin, using the (geomorphic change detection-GCD) model. In the GIS environment, it is a geomatic model to measure the extent of erosion and sedimentation spatially. The model relies on two different periods to extract results based on the digital elevation model. Two periods were relied upon in this study: (2002, 2022) with a time interval of 21 years.

Accordingly, the study showed, according to the outputs of the (GCD) model, that the volume of erosion reached (1134743 m3) over an area of (43443.59 m2), while the area exposed to deposition reached (53644.83 m2). With a volume of up to (821,397 m3). According to previous results, (53.01%) of the basin area was exposed to erosion during the study period, while the area of the area exposed to the sedimentation process reached (41.79%) of the total area of the basin. A percentage (9.8%) of the pelvic area was not subjected to the two operations, according to the results of the model.

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