Begin van beweging van bodemmateriaal

Resultaten van experimenteel onderzoek naar begin van bewegen van loskorrelig materiaal, relatie met Shields formule. Overzicht van uitgangspunten voor het bepalen van het begin van beweging van bodemmateriaal

Time scale of two dimensional local scour

The time scale of local scour is of importance in many model studies of practical problems. The use of a time scale is justified by the similarity in experimental scouring holes under different conditions. A time scale is derived from experiments with a wide range of length scales, velocity scales and material scales. The influence of velocity profile and turbulence intensity is demonstrated with some experiments

Lecture notes on local scour

Lecture note for the international course

Conformity and time scale in two-dimensional local scour

The conformity of local scour in experiments with non-cohesive bed material is studied for two-dimensional problems. A description of the flow pattern in the scour hole and development of the scouring process with time is given. The importance of the time scale in the design of structures where a temporary exposure of the bed to scouring effects occurs is stressed and some experimental data on this time scale and the conformity between various experiments are given. (Paper presented at the Symposium on model and prototype conformity, Hydraulic Research Laboratoy, Poona, India

Lecture notes on sediment transport 1

lecture notes on sediment transport by currents, initiation of motion, fall velocity, properties of the material, bed load, suspended load, total load, stable channels, river bed variations, scour, measuring techniques, sediment transport in pipes

Lecture notes on sediment transport 1

Lecture notes provided for IHE on sediment transport