Aplicação de metodologia de simulação hidrodinâmica de redes urbanas de drenagem pluvial para padrões desordenados de ocupação do solo e relevo: estudo de caso de microdrenagem na bacia do Rio Camarajipe – BA

Abstract

The disordered occupation of land and the lack of adequate stormwater drainage infrastructure in Brazilian cities exacerbate flooding, making it essential to develop methodologies to understand and mitigate these impacts. This study analyzes the use of a hydrodynamic simulation model to design and assess the behavior of surface stormwater runoff and underground microdrainage networks in an urban area characterized by rugged, steep topography and disordered urbanization, using as a case study a sub-basin of the Camarajipe River, in Salvador (BA). The research employs geoprocessing, highresolution topographic data analysis, and the quasi-two-dimensional hydrodynamic simulation software MODCEL, allowing the identification of areas susceptible to flooding and drainage failures, as well as supporting the design of a microdrainage system considering the complexity of the region. The methodology includes the delimitation of sub-basins, modeling of project conception stages, and adaptation of the model to the specific characteristics of the area, considering the influence of structures such as draining stairways, walls, and artificial barriers on the runoff. It was found that the use of hydrodynamic modeling combined with geoprocessing significantly improves the analysis of hydraulic behavior in densely and disorderly occupied urban areas, contributing to the formulation of more effective strategies for flood mitigation and hydraulic design of microdrainage systems. The findings reinforce the need for planning that considers the complexity of the urban environment and its topographic particularities, providing support for more assertive and sustainable interventions in stormwater drainage infrastructure.