Abstract The hydraulic performance of stilling basins is affected by their size and geometry. Taunsa Barrage, Pakistan, was constructed in 1958 remodelled 2008. In remodelling, baffle friction blocks were replaced chute dentated sill. After sounding, probing data during 2010–2014 revealed that flexible apron front some bays washed away. This study quantified parameters such as free surface, flo...

The violent fluctuation of hydrodynamic pressure in stilling basins is an important factor threatening the safety bottom plates basins, and plays role safe operation basins. In order to deeply understand fluctuating characteristics signal a basin plate processed by Hilbert-Huang transform method through hydraulic model test. this paper, three decomposition methods are used decompose pulsating s...

Introduction: The forced hydraulic jump characteristics were studied numerically using Flow-3D software. Rectangular and semi-cylindrical shape slices used as obstacles with different arrangements in the stilling basin to dissipate excess kinetic energy. Methods: Each type was tested under five values of discharges (60, 80, 100, 120, 160 l s -1 ). numerical results showed that act good energy d...

Forced hydraulic jump in a horizontal stilling basin with one and two continuous sills at the downstream end of an ogee standard weir was investigated. Experiments were completed on sills of five different heights which were fixed at two different distances from the toe of the weir. The main characteristics of the jump such as the sequent depth ratio, relative roller &#10length, and relative en...

Block ramps are hydraulic structures which are commonly used in river restoration projects. Especially in the last few decades, the use of this type of structures have become more and more popular. They furnish a correct balance between the hydraulic functioning and the environmental care, as they minimize the impact on the environment in which they are located. In addition, they can be conside...

The adaptation of existing dams is paramount importance to face the challenge posed by climate change and new legal frameworks. Thus, it crucial optimize design stilling basins reduce hydraulic jump dimensions without jeopardizing energy dissipation in structure. A numerical model was developed simulate a US Bureau Reclamation Type II basin. validated with specifically designed physical then us...

Hydraulic jump used to dissipate excessive kinetic energy in natural water ways since the down of time. Screens fixed stilling basin control hydraulic location, depth and length from four decades ago. In this study, screens with a constant height different widths same screen relative area (Ar=0.285) were located behind gate at distance 10 cm tested under wide variance conditions submerged jump....

Overthe years, Sungai Bunus has undergone hydrological changes and become lower narrower. Under a flood mitigation project, diversion channel is proposed to reduce the volume of water in Bunusfurthermore avoid spill over into Klang flooding events Kuala Lumpur city. This research describes physical modelling flow state stilling basin. Physical model was constructed verify design criteria basin ...