Abstract

The study aims to model the morphometric characteristics of the drainage network of the Tigris River Basin, located between latitudes 34O north and longitudes 43° east, represented by the morphometric characteristics, the spatial characteristics and the characteristics of the "drainage network, in addition to identifying some hydrological variables. The study relied on geographic information systems, topographic maps and the digital elevation model (DEM) as a tool to prepare a map of the river drainage network, which was classified according to the Strahler method into its river ranks for the basin. Some morphometric and hydrological characteristics will be extracted, and the extent of the relationship of morphometric characteristics to hydrological phenomena; due to their association with climate, the direction of rainstorms and their continuity, and their impact on water flow and floods. The study recommends the necessity of using geographic information systems to determine the most appropriate study sites in detail about the amount of sedimentation in the Samarra Dam resulting from the cessation of water due to its retention and exploitation.