Analysis of flooding in urban areas, taking into account the residence time of the water on site case of study: Veracruz, México

¹ Instituto de Ingeniería UNAM - Universidad Nacional Autónoma de México, Av. Universidad No.3000, Coyoacán México D.F.
² Universidad Autónoma Metropolitana Unidad Azcapotzalco, Azcapotzalco México D.F.

^a Corresponding author: FLunaC@iingen.unam.mx

Abstract

Analysing some aspects of water management in urban areas affected by flooding, an event that occurred in September 2010 by overflows Cotaxtla Jamapa and rivers in western Mexico along with the rain event for five consecutive days. In this area, near the Gulf of Mexico, the elevations are less than three meters elevation. Floods are common in cities like Veracruz, in this article the flood risk calculated by means of a hydraulic model of rainfall-runoff dimensional type developed at the Institute of Engineering of the National Autonomous University of Mexico. Data digital terrain elevation models of LIDAR were used, records hourly rainfall levels and channels of some hydrometric stations of the National Water Commission. The location of housing and services in a metropolitan area considered to calculate the depths of flooding in them. To estimate the damage, shall take into account the hydrodynamic behaviour of the flows. Since houses remain flooded for several days, was the reason to use precipitation level for more than seven days. in the mathematical modelling of flows water with a regular grid made up of cells 10 m by side with the boundary condition downstream, corresponding to the predicted change in the average sea level.