2020-02-212020-02-2119971-901502-00-7http://hdl.handle.net/2133/17657River flood valleys are being subjected to urbanization processes in big cities of the world. Therefore, urban planning strategies based on water resources management must be established to avoid environmental deterioration. The mapping of risk zones by means of mathematical modelling is a tool to carry out control policies of land use and occupation. This paper describes a two-dimensional mathematical model and the determination of inundation risk maps for two rivers in the Rosario region of Argentina. The mapping was made over both Saladillo and Luduefia rivers, for floods of return periods of 50, 100 and 500 years. The studied zones embraced an area of 7000 ha, with a population of 500 000 inhabitants. Based on the results, state and local governments are planning non-structural rules with the associated legislation. The paper concludes that it is important to use flow simulation models for urban planning strategies and water resources management.application/pdf123-135engopenAccessMathematical modellingInundation riskSaladillo and Ludueña flood valleysbookPartEdited by GEORGE H. LEAVESLEY US Geological Survey, WRD, MS 412, Denver Federal Center, Box 25046, Denver, Colorado 80225, USA HARRY F. LINS US Geological Survey, MS 414, National Center, Reston, Virginia 22092, USA FRANZ NOBILIS Hydrographical Central Office, Marxergasse 2, A-1030 Vienna, Austria RANDOLPH S. PARKER US Geological Survey, MS 415, Denver Federal Center, Denver, Colorado 80225, USA VERNE R. SCHNEIDER 175 Geological Survey, MS 414, National Center, Reston, Virginia 22092, USA FRANS H. M. VAN DE VEN RIZA—Institute for Inland Water Management and Waste Water Treatment, PO Box 17, 8200 AA Lelystad, The Netherlands