Skip to content

Levee breaching: a new extension to the LISFLOOD-FP model

Research output: Contribution to journalArticle

Original languageEnglish
Article number942
Number of pages18
JournalWater
Volume12
Issue number4
DOIs
DateAccepted/In press - 20 Mar 2020
DatePublished (current) - 26 Mar 2020

Abstract

Levee failures due to floods often cause considerable economic damage and life losses in inundated dike-protected areas, and significantly change flood hazard upstream and downstream the breach location during the event. We present a new extension for the LISFLOOD-FP hydrodynamic model which allows levee breaching along embankments in fully two-dimensional (2D) mode. Our extension allows for breach simulations in 2D structured grid hydrodynamic models at different scales and for different hydraulic loads in a computationally efficient manner. A series of tests performed on synthetic and historic events of different scale and magnitude show that the breaching module is numerically stable and reliable. We simulated breaches on synthetic terrain using unsteady flow as an upstream boundary condition and compared the outcomes with an identical setup of a full-momentum 2D solver. The synthetic tests showed that differences in the maximum flow through the breach between the two models were less than 1%, while for a small-scale flood event on the Secchia River (Italy), it was underestimated by 7% compared to a reference study. A large scale extreme event simulation on the Po River (Italy) resulted in 83% accuracy (critical success index).

    Research areas

  • residual flood risk, levee breach, 2D inundation modelling, Po River, Secchia River

Download statistics

No data available

Documents

Documents

  • Full-text PDF (final published version)

    Rights statement: This is the final published version of the article (version of record). It first appeared online via MDPI at https://www.mdpi.com/2073-4441/12/4/942 . Please refer to any applicable terms of use of the publisher.

    Final published version, 1.07 MB, PDF document

    Licence: CC BY

DOI

View research connections

Related faculties, schools or groups