Sustainability Issue #3 October 2009

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How did the research turn out? What were the findings? Researchers themselves report briefly on the research they have undertaken with funding support from the Formas Research Council.

Editor: Margaretha Nordahl

Difficult environmental choices for water and air

Numerical computation of large scale floods
Claes Eskilsson (project leader)
Summary of results with list of publications from Civil and Environmental Engineering, CTH.
Email: claes.eskilsson@chalmers.se

Floods occur when rivers and streams overflow their natural channels and put the areas at the sides under water. This is therefore a problem that acts in two horisontal dimensions. Nevertheless, floods are still often simulated from a unidimensional perspective, i.e. it is assumed that there is nil rate of flow and the depth of water is constant at right angles to the direction of flow of the river.

It would obviously be better to express the problem in time in both horizontal dimensions. It is particularly points of confluence, sharp bends and buildings that are more correctly simulated with the two dimensional method, but the problem is that for large areas the modelling times rapidly become extremely long. Tests have therefore been made to find if computation times can be reduced by using the new flexible numerical methods in combination with parallel execution on several processors.

Responsible for this page: Birgitta Bruzelius

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Sustainability October 2009

Focus presentation

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In brief

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