Deriving Water Valley Networks from Digital Elevation Models SRTM by Using Geographic Information Systems : Khabur River basin on the Iraqi side as a model

Abstract

The geographic information system provides the easiest ways and means to read the map and plan what is required according to the available databases about that map and analyze, read and sort aerial images, and the GIS technology can be used to represent the hydrological and morphological variables of surface features, including water valley networks with high efficiency and outside of them in the form of cartographic models as indicated In the current research, the mechanisms of derivation of water networks were studied by applying geographic information systems (GIS) with the help of digital models of elevation (Dem), including (SRTM) models to show their spatial accuracy. These studies are considered a gateway to standard morphometric analyzes of surface features and study of their morphological and spatial characteristics and thus come up with models that help us in identifying and making decisions, applications and projects of all kinds, including irrigation, water harvesting, establishing water reservoirs, forming lakes and rationing water drainage. Therefore, the ultimate goal of this study is to give value to geographic information systems (GIS) technology in studying the components of the natural environment, especially water networks and the surrounding factors.