Data of flume experiments with bed forms are used to analyze and compare different roughness predictors. In this study, the hydraulic roughness consists of grain roughness and form roughness. We predict the grain roughness by means of the size of the sediment. The form roughness is predicted by three approaches: Van Rijn (1984), Vanoni & Hwang (1967) and Engelund (1966). The total roughness val...

Flow resistance of natural grasses, sedges and willows was studied in a laboratory flume. The objective was to investigate, how type, density and placement of vegetation, flow depth and velocity influence friction losses. The plants were studied in various combinations under nonsubmerged and submerged conditions in a total of 350 test runs. The results show large variations in the friction fact...

Open water flume tanks with closed-loop circulation driven by centrifugal pumps are essential for hydro experimentation in academic settings as well research centers. The device is also attractive due to its versatility and easy-to-maintain characteristics. Nevertheless, commercial open systems can be expensive become less prioritized engineering schools. This paper describes the design fabrica...

This research aims to find a suitable transportation rate formula for bed load. Laboratory experiments were conducted in flume monitoring and measuring the of sediment particles (bed load) which move by jumping, rolling, or sliding within flume. study included two parts. The first part is experimenting using tracking particles' movement analysing images taken camera. measurements that have been...