A total of 48 experiments were conducted to investigate the impact slit weir dimensions and locations on maximum scour depth area created upstream. The model was a 110 mm opening, it installed at end working section in laboratory flume. flume 10.0 m long, 30 cm wide, deep, almost middle. It includes 2 with mobile bed thickness. In bed, two types nonuniform sand (with geometric standard deviatio...

The pier scour process is normally intensified in the presence of an ice cover, which poses risks to longevity and safety bridges. In present study, impact densimetric Froude number, locations, spacing side-by-side piers on local depth under ice-covered flow conditions were investigated based clear water experiments S-shaped laboratory flume. results demonstrated that at along convex bank was m...

This study investigated vortex-induced vibrations of marine risers in Ocean Thermal Energy Conversion systems. Flume experiments were conducted under two conditions: Condition 1 was with a fixed riser bottom, and 2 bottom on mooring platform. The cross-flow acceleration the measured at different current velocities, corresponding vibration responses analyzed. Numerical simulations based flume em...

The mechanisms of debris flows and their interaction with mitigation structures are still not well understood. Among the research challenges, only few entrainment measurements available in literature, as is often masked by deposition on top. In this paper, we present a simple, cheap, effective method to measure depths. Flume experiments have therefore been performed assess influence initial flo...

Experiments on the entrainment of surface sediments around polychaete tubes at natural and manipulated densities were conducted in a recirculating seawater flume. Intact cores with either 0 or 8 Diopatra cuprea tubes per 0.01 m* plus associated assemblages were collected in the field. Sediments which contained D. cuprea tubes had natural macrofaunal densities > 5 x those of sediments without tu...

Oscillating buoy device, also known as point absorber, is an important wave energy converter (WEC) for development and utilization. The previous work primarily focused on the optimization of mechanical design, buoy’s array configuration site selection with larger density in order to improve generation performance. In this work, enlightened by potential availability Bragg reflection induced mult...

all experiments in this study were carried out in a flume which was located in the hydraulic laboratory of technical faculty in guilan university. the wave flume was 12 m long, 0.5 m wide, 0.5 m high and equipped with a wave-producing system and ultrasonic sensors. the objectives of current experimental study are to investigate sediment transport, bed formation and sustainability of sandy beach...

This paper presents a system for the surface reconstruction of water waves using shape-from-stereo techniques. Based on two infrared cameras operating in the 3 − 5 μm wavelength range, the system acquires thermographic image sequences of the water surface with high temporal resolution. Due to the optical properties of water, imaging in this region of the infrared spectrum is well suited for ste...

The “Flume Room” The University of Michigan has created a specialized laboratory containing 150 artificial mini-streams, or “flumes,” that mimic a variety of river conditions as closely as possible. The flumes are populated with rocks, sediment, biota, and more than 3,000 gallons of water from the Huron River. The goal is to better understand how different stressors—nutrient and chemical pollut...

Various washing protocols have been assessed for efficacy using Agilent LC/MS and GC/MS instrumentation to measure pesticide residues in tomatoes and other produce. Washing procedures in water and various solutions, with and without sonication, were evaluated in the laboratory. In general, the effect of sonication depended on the washing treatment and on the pesticide. A separate experiment mea...