Sediment Transport Upstream of Reservoir of Haditha Dam*

Abstract

This research is carried out to evaluate the amount of bed sediment load entering Haditha reservoir. The proper selection of a sediment transport formula to evaluate river's response is important. However, there are no definitive guidelines for the selection of transport formula. Therefore, an analysis was made on six sediment transport formulas, (Engelund-Hansen, Ackers-White, Yang, Maddock, Graf-Acaroglu and Karim-Kennedy) to check the applicability of each transport formula. The data used have been investigated by depth integrated sampling over a period from 26/1/2003 to 10/3/2003 and from 15/6/2003 to 16/9/2003.
Besides, a new formula was developed as sediment transport predictor for expected ranges of hydraulic and sediment characteristics of Euphrates river up-stream of Haditha dam.
It was concluded from the analyses that the used six formulas required adjustments to closely describe the measured data. Engelund-Hansen and Maddock formulas are better than other four formulas in predicting the total sediment load.
The predicted values using the new formula has no significance difference compared
with the observed values? The analysis showed that the new formula is better than the other
ones in predicting the sediment discharge, where the observed data have discrepancy ratio
between (0.5-1.5).