ABSTRACT
ABSTRACT: Sediments carried by rivers begin to settle when the water enters a reservoir, resulting in sediment depositions. The aim of this study was to increase the knowledge of suspended sediment transport in a comparatively small reservoir located in the North-West of Costa Rica. Vertical distributions of suspended sediment concentrations and particle sizes were measured along the reservoir by using a LISST instrument in order to get spatial variations. The results showed that sediment concentrations and mean grain sizes decrease continuously along the reservoir, especially in the upstream area of the reservoir. A significant increase in the concentrations with depth could only be seen in the most upstream transect, all other transects showed an almost uniform distribution of the concentrations over the depth.
