مراقبة تغيرات الجزر النهرية في مدينة القائم باستخدام التقانات الجيوماتكس

Abstract

The present study is concerned with the changes that occurred on the river islands in the course of the Euphrates river using geomatics technologies, a section of the river with a length of (21.528) km was studied within the study area, which separates the al-Qaim district from the Al-Shamiya district and Al-Rumana district from the island side and is bordered from the west by Iraqi-Syrian border and from the east by Al-Obaidi bounty. The study was carried out during the period of (1980-2020 A.D.), which included the natural characteristics of the area that has an impact on the emergence of river islands, as well as the study of the morphology of the islands via using the quantitative method of analysis based on the digital elevation model (DEM) with a distinctive resolution (30 ×30) meters, the remote sensing data of the land SAT LC 8 multi-spectral satellite captured in 2020 A.D. and 1980 A.D., as well as the use of (Arc Map v 10.4.1) and (ERDAS IMAGINE 2014) programs. According to what has been studied, the following results were reached: that the river islands have been changed in their numbers and areas between the two study periods, as new islands have appeared that did not exist in 1980 as the number of (15) islands and reached an area of (2086338) m2, and then in 2020A.D. they became (79) islands to reach a total area of (6673778.413) m2. The difference in the increase of the area between two years was about (4587440.413) m2, as well as the presence of twists and turns within the river course which marks the evidence of the difference between the real length and the ideal length of about ( 4.826) km, and, then, the impact of river islands in human activity was studied.