Modelización hidráulica de drenaje urbano. aplicación sector nororiental distrito Santa Inés Tunja-Boyacá

Abstract

In the cities is denote dan exponential growth of impervious surfaces, generating significant increase in runoff in urban watersheds. Historically in the Tunja city has been a phenomenon of occupation of the natural channels of rain wáter, altering the natural watershed hydrology. At present the city has a considerable and rapid urban development towards the Northeast zone, boilovers in the system of drainage and flooding affecting the public. Currently the existing drainage system does not have instrumentation to record flows generated out of urban áreas. In this study was the implementation of sector Northeast District Santa Inés, precipitation and flow measurement equipment, the basin was discretized at a detailed scale (56 sub-basins), which was calculated parameters physical and drainage. Calibrating associated parameters whit hydrological initial losses and roughness coefficients. A calibrated and validated urban drainage model was built using SWMM 5.1 software, obtaining the temporal hydrodynamic modeling of the system with real rainfall events and significant runoff generated. The model adequately reproduces the real evolution of the system and was used to make predictions under a máximum design rainfall event. Determining two zones flooding, defining alternative solutions focused on increasing hydraulic capacity of existing collectors and projecting parallel networks that contribute to reléase hydraulic load that suffers under a scenario of storm drainge system.