Justin B. Butler

TL;DR: In this article, the acoustic Doppler velocimeter (ADV) is used to measure the velocity of small particles, assuming to be moving at velocities similar to the fluid.

TL;DR: In this paper, a methode d'evaluation of the qualite of a modele numerique des altitudes (MNA) is presented, in which l'on a appliquee en sortie d'un algorithme d'appariement stereoscopique base on a correlation croisee normalisee.

TL;DR: The research shows that it can be used to map and quantify very rapidly spatial variations in grain-size characteristics, although it cannot deal with the longrecognised problem of the relationship between two-dimensional planformgrain-size estimates and actual a- and b- axes obtained by direct grain sampling.

TL;DR: In this paper, an application of the photogrammetrie numerique rapprochee for determining and suivre the variations which interviennent sur les graviers dans le lit des cours d'eau, tant dans des canaux d'amenee que sur le terrain.

TL;DR: In this paper, the authors used two-dimensional variogram surfaces to derive directionally dependent estimates of fractal dimension and found that fractal dimensions were greater in the downstream direction than in other directions suggesting that the effects of water working are to alter the level of surface organisation by increasing surface irregularity and hence roughness.