Breil P. auteur aut IRD Faty A. auteur aut IRD Orange Didier auteur aut IRD text conferencePaper fre text/pdf reformatted digital access Due to global change, cities of the future will have to deal with more intense runoff and longer drought sequences, in addition to a growing urban and peri-urban population. French Mediterranean cities, such as Toulon, are already densely urbanised and exposed to the effects of global warming. The adaptation of their infrastructures is problematic. Cities with high development potential, such as Dakar, offer the opportunity to imagine other solutions for the management of water resources and its extremes in the context of global change. In particular, it is a question of managing the flows of water and substances linked to intense runoff events according to an ecohydrological logic that makes it possible to reduce environmental risks and increase social and economic benefits. To do this, we use a hydrologically-based geomatics model (IRIP) that produces predictive maps of areas of generation, transfer and accumulation of intense runoff and associated nutrients. This allows us to target effective intervention areas to reduce risks and increase water resources, for example by simulating land use change in appropriate locations and at the same time stimulating specific biological processes. The fundamental principle of ecohydrology is to balance energy flows with biological metabolic flows at the sub-catchment scale. The mapping of intense runoff processes is a first step illustrated in this article for the cities of Toulon and Dakar. This first step is part of the Dakar'2030 project, which aims to rethink urban development and adapt it to climate change. specialized VILLE RESSOURCES EN EAU ECOLOGIE PLUIE RUISSELLEMENT PREVISION SECHERESSE UTILISATION DU SOL METHODOLOGIE CARTOGRAPHIE BASSIN VERSANT CHANGEMENT CLIMATIQUE GESTION DE L'EAU RISQUE MODELE IRIP FRANCE DAKAR SENEGAL 062MECEAU02 062EVAEAU03 021CLIMAT01 102URBHA2 International Conference on the 'Hydrology of the Great Rivers of Africa', 4., Cotonou (BEN) 384 331-336 Amoussou E. ed. edt IRD Mahé Gil ed. edt IRD Amrouni O. ed. edt IRD Bodian A. ed. edt IRD Cudennec C. ed. edt IRD Dietrich S. ed. edt IRD Kodja D.J. ed. edt IRD Vissin E.W. ed. edt IRD Wallingford AISH 2021 https://www.documentation.ird.fr/hor/fdi:010087866 10.5194/piahs-384-331-2021 [F A010084849] https://www.documentation.ird.fr/hor/fdi:010087866 https://horizon.documentation.ird.fr/exl-doc/pleins_textes/2023-08/010087866.pdf IRD - Base Horizon / Pleins textes 2023-05-09 2025-04-22 fdi:010087866 fre