MODELING SEDIMENT TRANSPORT IN STREAM CHANNELS IN THE ARID ZONE OF INDIA

Ephemeral channels in arid regions convey larger amounts of sediment t han perennial channels in humid regions. Sediment graphs at the outlet of channels have been derived by the standard sediment rating curve t echnique and by a lumped model based on the instantaneous unit sedimen t graph (IUSG) concept. The IUSG gives estimates of sediment transport that are better than those derived with the sediment rating curve as it takes into account the availability of erodible material within the channel bed.