Flood-plain mapping: a critical discussion of deterministic and probabilistic approaches
2010 (English)In: Hydrological Sciences Journal, ISSN 0262-6667, Vol. 55, no 3, 364-376 p.Article in journal (Refereed) Published
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.
Place, publisher, year, edition, pages
2010. Vol. 55, no 3, 364-376 p.
flood-plain mapping, hydraulic models, flood hazard, uncertainty analysis
Earth and Related Environmental Sciences
IdentifiersURN: urn:nbn:se:uu:diva-136419DOI: 10.1080/02626661003683389ISI: 000278013100006OAI: oai:DiVA.org:uu-136419DiVA: diva2:376853