Investigation of performance of sediment transport formulas based on measured data in Euphrates River, up stream of al-Abassiya Barrage

الملخص EN

Reliable prediction of sediment discharge is very important element in the evaluation of sedimentation in reservoir, local scour or deposition around hydraulic structures, river bed degradation, etc.

The existing sediment discharge formulas are derived in flumes or tested with limited field data.

Hence, the performance of these formulas are unknown in reference with measured flow and data of sediment in natural river.

This paper presents the evaluation of eight existing sediment transport formulas (Enguland-Hanssen, Ingls-Lacey, Ackers-White, Yang1972, Yang 1978, Bagnold,Ariffin and Van Rijn) against the field data obtained from twenty cross sections along entire study reach (up-stream AL-Abbasiya Barrage).

Measured data included the hydraulic parameters of different cross sections and the properties of sediment particles.

Samples of water sediment have been taken at each section in addition to bed samples using home-made samplers, while hydraulic parameters were founded using Acoustic Doppler Current Profile (ADCP) device.

Although significant deviations are found between predictions and measured values in these evaluations, two formulas respectively (Acker-White and Van Rijn)gave a reasonably good agreement.