Coloured and East-illminated Digital Elevation Model (created by NPA Group) of southern Lebanon. The monochrome image shows the interpretation. The main fault scars are clear on the image, particularly the segmented Roum Fault system. River offsets (Zahrani and Litani) are classically used to infer a northward reduction in slip on the Roum system. However, this neglects possible stream capture. Presumably the ancestral Zahrani river flowed in the unlabelled (dry) gorge to the south of the modern river. Additionally, the Litani river originally flowed south into Hula. The modern Litani and Zahrani courses are composit and and not merely offset by the faulting.  Full discussion of drainage evolution is given by Butler et al. (1998).