ABSTRACT
This paper deals with the application of flood propagation models in rivers with skewed bridge crossings. In such situations, the application of 1-D models is not trivial because of the uncertainty related to the narrowing induced by bridge piers within the cross-sections. In order to study this problem, this paper investigates 1-D and 2-D state-of-the-arte unsteady flow models that have been applied to the situations characterized by bridges or a sequence of skewed bridge crossing. The availability of terrestrial and airborne LIDAR and the comparison between 1-D and 2-D results, allowed practical suggestions to optimize the 1-D results in the above mentioned situations.
