دراسة مختبرية لتخمين الرسوبيات المزالة من مقدم السدود الغاطسة باستخدام منافذ السفلية

Abstract EN

In this research, a series of laboratory experiments were carried out to estimate the removing sediment amount from upstream weirs using bottom outlets.

The experiments were conducted in a laboratory channel (24.6 m) in length and (0.81 m) wide, in middle of which a weir was fixed.

Six discharges were allowed to flow with, three different sediment concentration for each.

The results showed that there is a direct relation between the area of the holes, Froude number and the amount of sediment removed, the depth of aggradation near weir location decreases with increasing the number of holes.

A dimensionless equation was created to compute the amount of sediment removed in terms of area of the holes with a coefficient of determination (0.895) and the percentage of the highest and lowest difference between the measured and calculated sediment amount were (15.7, 0.2), respectively