Alternate bars were formed by sediment transport in a flume with Froude-modelled flow and relative roughness characteristic of gravel-boulder channels with steep slopes. The flume (0.3 m wide x 7.5 m long) was filled with a sand-gravel mixture, which was also fed into the top of the flume at a constant rate under constant discharge. Channel slope was set at 0.03. Initially, coarse particles acc...

Gravel beds can prevent sand-dust emission and weaken sand-dust flux. We used wind-tunnel experiments and field observations on artificial gravel beds above the Mogao Grottoes to quantify their impact. In the report, we identified a significant correlation between gravel roughness and its ability to trap wind-transported sand. The optimal combinations of gravel diameter and coverage were determ...

Soil water retention parameters are critical to quantify flow and solute transport in vadose zone, while the presence of rock fragments remarkably increases their variability. Therefore a novel method for determining water retention parameters of soil-gravel mixtures is required. The procedure to generate such a model is based firstly on the determination of the quantitative relationship betwee...

Moisture damage of asphalt mixtures is a major distress affecting the durability pavements. The loaded wheel tracking (LWT) test gaining popularity in determining moisture because its ability to relate laboratory performance field performance. However, accuracy LWT’s “pass/fail” criteria for screening limited. objective this study was evaluate capability LWT identify susceptibility with differe...

Contents 1. Introduction 2. Gravelly Beach Morphology 2.1. Gravelly beach profiles 2.2. Berms and the beach step 2.3. Cusps 3. Hydrodynamics of gravel beaches 3.1. Waves 3.2. Swash phase and percolation effects 3.3. Hydrodynamic effects of the beach step 4. Morphosedimentology of Gravel Beaches 4.1. Size and shape sorting 4.2. Measuring gravel size and shape. 4.3. Bluck models of gravel beach s...

The bearing capacity of CFA (Continuous Flight Auger) pile is not able to reach the design if proper construction performed due soil collapse at bottom pile. In this paper, three samples were prepared simulate pile: grouting sample; mixture and gravel; sand. failure surfaces each sample obtained by a uniaxial compression tests represented as three-dimensional point cloud laser scanning. Therefo...

Sphericity and roundness have been employed in sedimentological and geomorphological studies to represent the gross shape of a gravel particle. The original complex definitions of gravel sphericity and roundness led to the use of visual charts or simplified parameters. Although the accurate derivation of sphericity requires the surface area of a gravel particle, manual measurement of the area i...

Sediment transport, one of the key processes of river systems, is altered or stopped by dams, leaving lower river reaches barren of sand and gravel, both of which are essential habitat for fish and macroinvertebrates. One way to compensate for losses in sediment is to supplement gravel to river reaches below impoundments. Because gravel addition has become a widespread practice, it is essential...