DESARROLLO DE UNA METODOLOGÍA PARA PROYECTOS DE REHABILITACIÓN DE REDES DE DRENAJE PLUVIAL BAJO ESCENARIOS DE CAMBIO CLIMÁTICO

Abstract

Drainage networks are currently experiencing an significant increase in runoff flows, mainly caused by waterproofing of the soil and the effects of climate change. This results in properly designed networks presenting floods with return periods much higher than those considered in the design phase. This paper presents a methodology for the rehabilitation of these drainage networks based on three stages: a study of the design rainfall obtained from climate change models; a hydraulic analysis model of the network and a heuristic optimization model. The recursively used of the optimization model allows the pre-location of retention tanks and pipes that potentially should be rehabilitated. Subsequently, the same optimization method is used for the detail design of tanks and ducts. The methodology developed has been applied to a sector of the drainage network of the city of Bogotá network. The results show the pre-localization phase reduces the search space and increases the convergence towards the final solution. Likewise, the method shows how joint use of tanks and pipe rehabilitation involves projects with a lower investment cost.