Document Type : پژوهشی
Authors
1 عضو هیئت علمی دانشگاه ازاد اسلامی
2 Department of Geography, Mahshahr Branch, Islamic Azad University, , Mahshahr, Iran
Abstract
Understanding the river's changes and displacements in the past decades is essential for future planning. Using remote sensing facilities, satellite images, and aerial photographs, these goals can be achieved at minimal cost and in the shortest possible time. The aim of this study is to zone the temporal and spatial changes of the riverbed using satellite images in the Arc/Map software environment. Landsat satellite images from 1973, 1986, 1999, 2012, and 2024 were used to examine and monitor the temporal and spatial changes of the Bahmanshir River. The river was divided into six different intervals and the changes were zoned in seven classes: high sedimentation, medium sedimentation, low sedimentation, stable, low erosion, medium erosion, and high erosion. The results showed that in all periods except the 1999-2012 period, the sedimentation rate prevailed over the erosion rate. In all periods except the 1999-2012 period, the sedimentation rate prevailed over the erosion rate. The largest changes occurred in the first period during the period 1999-2012, in the second, fourth and fifth periods during the period 1973-1986, and in the third and fifth periods during the period 2012-2024. Considering that in all the periods studied except the period 1999-2012, sedimentation prevailed over erosion, only in the first period did erosion exceed sedimentation.
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