Efecto de la construcción del puente lavalle en la evolucion de meandros en el rio bermejo

Translated title of the contribution: Effect of the construction of the Lavalle bridge on the evolution of meanders at the Bermejo river

Jorge D. Abad, Pablo D. Spalletti, Marcelo H. García, José D. Brea

Research output: Contribution to conferencePaperpeer-review

Abstract

A bridge located in Pto. Lavalle, Chaco province at the Bermejo river, Argentina has produced morphological variations on the river evolution both upstream and downstream of the structure. It is observed that the bridge controls the stream evolution locally. Two characteristic lengths are found; upstream of the bridge, the length is denominated Λu, which represents the region where the presence of the bridge disrupts and constrains the freely meandering migration pattern of the stream producing changes on curvature and orientation of the bends. In the other hand, downstream of the bridge, Λd is the distance where the lateral migration of pre-existent bends have been diminished or almost eliminated. Herein, the model RVR Meander (Abad & Garcia, 2006) was used to characterize and analyze the migration of the Bermejo river and the influence of the bridge on the morphological processes. The model allows estimating the lateral and longitudinal migration rate of the stream among other parameters. The model also predicts the migration in time of the stream by coupling a hydrodynamic and bank erosion model. In this study, the validation of the model for the Bermejo river is shown together with the estimation and characterization of the lengths Λu and Λd. This study sets the basis for future plans on applying more sophisticated models in a region near the bridge.

Translated title of the contributionEffect of the construction of the Lavalle bridge on the evolution of meanders at the Bermejo river
Original languageSpanish
StatePublished - Jan 1 2006
EventInternational Symposium on Hydraulic Structures - XXII Congreso Latinoamericano de Hidraulica - 22nd Latin American Congress on Hydraulics 2006 - Ciudad Guayana, Venezuela, Bolivarian Republic of
Duration: Oct 9 2006Oct 14 2006

Conference

ConferenceInternational Symposium on Hydraulic Structures - XXII Congreso Latinoamericano de Hidraulica - 22nd Latin American Congress on Hydraulics 2006
CountryVenezuela, Bolivarian Republic of
CityCiudad Guayana
Period10/9/0610/14/06

ASJC Scopus subject areas

  • Mechanical Engineering

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