Diseño de un sistema urbano de drenaje sostenible (SUDS) para manejo de escorrentía en la carrera 9 entre calles 108 y 112, sector Usaquén, Bogotá, Colombia

Abstract

The purpose of the following paper is the preliminary design of sustainable urban drainage structures (SUDS), complementary to the existing storm drainage system in Avenue 9 between 108th and 112th Streets in the Usaquen sector, with the objective of mitigating and preventing the frequent flooding that occurs through a integral treatment of rainwater. Following design methodologies applied in other countries and at the country, a site characterization, an evaluation of the current state of the existing rainwater drainage, a selection of the most suitable typologies to be applied, together with a study of precipitation for return periods of 3 and 25 years, where SUDS are then sized and their contribution to the reduction of peak flows and improvements in the existing rainwater drainage are analyzed by using the EPA SWMM 5.1 program. Based on the above, it is found that one of the main causes of waterlogging is due to the topography of the ground as well as to an error in the sizing of the sewers, which causes one of the pipes on Avenue 9th convey pressurized rainwater and an overflow in one of the access manhole, it is determined that by making use of structures such as attenuation tanks, permeable pavements and bioretention zones it is possible to reduce the peak outflows up to 47% in short return periods and 24% in a longer one in compliance with Article 153 of Resolution 033 of 2017. Likewise, it is established that it is likely to improve the conditions of the existing sewerage by reducing the filling ratio (y/d) in one of the collectors by 20% thus reducing the outflow in one of the access manhole. On the other hand, it is found that to achieve significant effects in terms of the parameter "Quantity" it is necessary to carry out interventions on a large scale or in a considerable area.