An integrated approach to simulate flooding due to river dike breach

Informatics and the environment : data and model integration in a heterogeneous hydro world (11th, New York, 17-21 August 2014) : proceedings / 11th International Conference on Hydroinformatics 2014. - [New York, NY] : CUNY, The City University of New York, 2014. - (CUNY academic works). - Paper 55 (2014)

Contribution to Conference

11th International Conference on Hydroinformatics 2014

Publisher Link

https://academicworks.cuny.edu/cc_conf_hic/55/

Publisher

CUNY, The City University of New York

This paper presents an integrated approach that enables the simultaneous modeling of dike breaching process and flood propagation. The dike breaching process is modelled with a simple breach model implemented into a 2-dimensional hydrodynamic flood model – Telemac2D. Telemac2D models the propagation of the arising flood into the hinterland. The breach model generalizes dike breaching process in two general stages. In the first stage, dike breaching is predominantly vertical with limited lateral breach growth; and in the second stage breach grows only laterally. The breach model requires breach location, breach duration, and length and axis of dike affected by the breach as input parameters. Breach starts at the center of the dike length affected by the breach and can be initiated in three different ways: at a given time, based on water level on the dike or based on water level at a given point. The first stage takes one tenth of the total time required for the entire breach and has a breach width equal to one tenth of the final breach width. The approach is exemplarily applied to model the year 1996 Awash River dike breach flood at Wonji, Ethiopia, a historic dike breach flood that destroyed the sugar plantation and offices of Wonji Shoa Sugar Factory. The water depth calculated with the numerical model is in good agreement with the water level mark left on buildings as witnessed by people present at the place after the disaster, including the dike foreman.

DDC Class

600: Technik

620: Ingenieurwissenschaften

710: Landschaftsgestaltung, Raumplanung

Publication version

publishedVersion

Lizenz

http://rightsstatements.org/vocab/InC/1.0/

Name

Tadesse, Fröhle 2015 - An Integrated Approach to Simulate.pdf

Size

1.3 MB

Format

Adobe PDF

Options

An integrated approach to simulate flooding due to river dike breach