In this paper is presented a bi-dimensional approach to the study of flood of the Tagliamento River in the
presence of meanders. It deals with a 2D depth-averaged numerical model based on conservative form of De
Saint Venant equations. A finite volume method is used to solve non linear equations by a Godunov approach
supported by a robust and efficient approximate solver proposed by Harten, Lax and van Leer (HLL). First,
we show the ability of the model to understand the variations in the level of cross-curve due to centrifugal acceleration.
To this end, it is shown a comparison between the experimental results of Shukry (1950) and similar
numerical simulations. Following is discussed behaviour levels in the meanders of low Tagliamento during the
flood event of 4 November 1966.
