Flood-plain mapping: a critical discussion of deterministic and probabilistic approaches

Di Baldassarre, Giuliano and Schumann, Guy and Bates, Paul D. and Freer, Jim E. and Beven, Keith J. (2010) Flood-plain mapping: a critical discussion of deterministic and probabilistic approaches. Hydrological Sciences Journal, 55 (3). pp. 364-376. ISSN 0262-6667

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Abstract

Different methodologies for flood-plain mapping are analysed and discussed by comparing deterministic and probabilistic approaches using hydrodynamic numerical solutions. In order to facilitate the critical discussion, state-of-art techniques in the field of flood inundation modelling are applied to a specific test site (River Dee, UK). Specifically, different flood-plain maps are derived for this test site. A first map is built by applying an advanced deterministic approach: use of a fully two-dimensional finite element model (TELEMAC-2D), calibrated against a historical flood extent, to derive a 1-in-100 year flood inundation map. A second map is derived by using a probabilistic approach: use of a simple raster-based inundation model (LISFLOOD-FP) to derive an uncertain flood extent map predicting the 1-in-100 year event conditioned on the extent of the 2006 flood. The flood-plain maps are then compared and the advantages and disadvantages of the two different approaches are critically discussed.

Item Type:
Journal Article
Journal or Publication Title:
Hydrological Sciences Journal
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2300/2312
Subjects:
ID Code:
62606
Deposited By:
Deposited On:
27 Feb 2013 15:20
Refereed?:
Yes
Published?:
Published
Last Modified:
25 Mar 2020 04:30