Detection of Linear phenomena in the Origins and Development of Watercourses (Tigris River section between Samarra and Deiala) Using Geographical Techniques (GIS-RS).

Abstract

  Linear phenomena affect the change of surface forms due to tectonic movements and change their general pattern in most areas where tectonic instability or activation continues.  It is an area of tectonic activation and instability due to the continued accumulation of sedimentary sediments transported by the Tigris and Euphrates rivers

 This study focuses on the causes of the changes of the course of the Tigris River in the Abbasid era than in the present day and what are the causes of these changes and the negative and positive results The conclusions reached by the researcher on the causes of changes, It is the catalytic activation of the fact that the region is still unstable and that ground movements, Continued as a result of the accumulation of sediments of the Tigris and modern Euphrates, This led to the rise of the Tigris River damn old course led him to search for another stream, Less all these reasons made the old Abbasid river change course with a new course from south to east