Intake systems in ephemeral rivers

This paper is focused on the study of bottom rack intake systems located in ephemeral and torrential streams. Clear water, and water with gravel sediment transport have been analyzed. Different tests have been carried out to quantify the influence of the solids passing through the racks. The wetted rack lengths and the efficiency of racks are studied. The clear water has also been modelled with computational fluid dynamics, and compared with the measurements obtained in the laboratory. Experimental and numerical studies that characterize both the clear water and the influence of solid load in the operation of the bottom racks will allow us to improve the existing design criteria.