DOI: 10.5593/SGEM2014/B31/S12.084


Wednesday 1 October 2014 by Libadmin2014

References: 14th International Multidisciplinary Scientific GeoConference SGEM 2014, www.sgem.org, SGEM2014 Conference Proceedings, ISBN 978-619-7105-13-1 / ISSN 1314-2704, June 19-25, 2014, Book 3, Vol. 1, 647-654 pp

Water Framework Directive 2000/60/CE and Flood Directive 2007/60/CE establish the need for preparation of flood risk maps for each member country on each important hydrographic basins. Flood Directive requires Member States to assess if all water courses and coast lines are at risk from flooding, to map the flood extent and assets and humans at risk in these areas and to take adequate and coordinated measures to reduce this flood risk. This Directive shall be carried out in coordination with the Water Framework Directive, the flood risk management plans and river basin management plans must to be coordinated. To prepare flood risk maps need flood wave propagation study using hydroinformatic tools. In the last decades have taken a emergence of numerical tools for calculations, simulation and to the mapping in the domain of hydrodynamics, thanks to the computer technologies, the evolution of the programming languages and fast increment of processing speed. This paper presents the mathematical basis of two flood wave propagation simulation models, DUFLOW and MIKE11, and the comparison of these. The first model, DUFLOW, is a one-dimensional program for quantitative and qualitative modeling of water movement in open channels. The numerical methods offer multiple possibilities related to the most complex and difficult problems of research, developed in physics of hydraulic phenomena’s. The numerical calculus permit the knowledge of physical phenomena’s with sufficient accuracy, so most times, checking on laboratory models is no longer necessary. The second model, MIKE11, is a professional engineering software package for simulation of one-dimensional flows in estuaries, rivers, irrigation systems, channels and other water bodies. MIKE 11 is a 1-dimensional river model. The MIKE 11 is an implicit finite difference model for one dimensional unsteady flow computation and can be applied to looped networks and quasi-two dimensional flow simulation on floodplains. The model has been designed to perform detailed modeling of rivers, including special treatment of floodplains, road overtopping, culverts, gate openings and weirs. MIKE 11 is capable of using kinematic, diffusive or fully dynamic, vertically integrated mass and momentum equations. The paper contains also a case study, i.e. a flood wave propagation study for Crasna River, situated in north-western Romania, with the two hydroinformatic tools (DUFLOW and MIKE11) and results comparison.

Keywords: flood wave, propagation, floods, hydroinformatic tools