Using of Stepped Shape Rock filled Weir as Squandering Energy Structure in Rectangular Channels : A Laboratory Study

Abstract

Measuring the ability of hydraulic structures on works performing may be consider as a definition of the flow energy. The current study goal is to know the dispersed energy of flow in the steps-shaped, rockfill weir. A set of twenty five laboratory experiments and one hundred seventy five operation tests were carried out by using a laboratory handled metal channel with multiple discharge values. The tested hydraulic models has a different five lengths, and the filling material used was natural quarry crushed stone with five different median diameters. The results of analysis showed that the energy dissipationincreases by increasing the discharge value, and decreases by increasing both the length ratio of the rockfill weir, and the diameter of the rockfill sample used. The resulted equation for energy dissipation refers toa positive agreement between the predicted and measured energy dissipation values.