1D/2D porosity model for urban flood modeling: case of a dense street networks Pascal Finaud-Guyot, Pierre-André Garambois, Shangzhi Chen, Guilhem Dellinger, Abdellah Ghenaim and Abdellali Terfous E3S Web Conf., 40 (2018) 06010 Published online: 05 September 2018 DOI: 10.1051/e3sconf/20184006010