LandSat Satellite ETM+ image have been analyzed to detect the different depths
of regions inside the Tigris river in order to detect the regions that need to remove
sedimentation in Baghdad in Iraq Country. The scene consisted of six bands
(without the thermal band),It was captured in March ٢٠٠١. The variance in depth is
determined by applying the rationing technique on the bands ٣ and ٥.GIS ٩.١
program is used to apply the rationing technique and determined the results.