Author(s): Juan Maldonado Silvestre; Ignacio Caldino Villagomez
Linked Author(s):
Keywords: Hydraulic fluvial models; Physical fluvial models
Abstract: Results included in this paper, were obtained from a study applied to the mouth of the left branch of Balsas river, Mexico where overflows have affected several sites, causing serious erosion problems in the channel. A bar at the mouth breaks with discharges from 2,200 m 3 /s to 2,500 m 3 /s, and its previous position modifies. Those problems have affected areas beside the river; pylons locate on the right bank near the mouth; and a growing industrial area. For analyzing these problems, a fixed bed and a mobile bed model were constructed; with the first one hydrodynamics were analyzed with different runs, in the second one, erosion was studied. Runs in fixed model were carried out with discharges from 650 m 3 /s up to 13,000 m 3 /s. In the runs were measured levels, speeds; observations of the flow behavior in flood areas were identified and sites where the bar opens. With regard the mobile bed model, discharges ranged from 650 m 3 /s to 3,250 m 3 /s, causing the bifurcation was located with the greater influence in the marginal erosive displacement; the site where the bar is broken; and the channel stretch had deposits product of material erosion. Finally, results comparison was done including obtained in hydraulic models and those observed in the river; flood records and the hydraulic parameters.
Year: 2002