Aplicação da metodologia BIM e de ferramentas GIS para automação de modelagem de redes de drenagem pluvial urbana

Abstract

In spite of the great potential of BIM for the infrastructure sector, the methodology still presents limitations, especially in managing larger linear projects. As projects become larger or their topography become more complex, BIM requires support of GIS tools, as these have the potential to quantify real-world situations and focus on buildings’ external geospatial information and their interactions with the environment. More complex spatial elements are considered part of GIS models, while more detailed construction components belong to BIM universe, and both complement each other with presence of common objects such as Parcels. To enable the creation of customized design tools which allow information integration between domains, AEC industry has developed programming applications embedded in software, including Visual Programming Languages (VPLs). In the case of urban stormwater drainage projects, which cannot be replicated on a large scale due to unique topographic features of each location, the challenge is to develop customized models for each project. In this activity, parameters such as runoff coefficient values are often defined manually, without computational tools assistance, resulting in inaccuracies and delays in completing the task. Thus, this work aims to present an automating algorithm for urban stormwater drainage networks design through the integration of Autodesk Civil 3D and QGIS software. As a methodology, 4 automation algorithms were developed using native tools of both software and Dynamo for Civil 3D and Graphic Modeler for QGIS VPLs, capable of determining the Parcels of terrain’s watersheds, calculating runoff coefficients, and modeling drainage network pipes and structures. Implementation of the algorithm in 2 case studies resulted in supervised automatic obtainment of runoff values for each basin, modeled from polygons with water discharge points indication, and pipe networks models, in which each discharge structure was positioned at these

points. Unlike literature review, where authors justified BIM-GIS integration necessity in the cases of large infrastructure or complex urban environments, this author employed GIS as it proved to be a more efficient tool for handling non-dimensional and two-dimensional data from geospatial objects, and for returning the results to BIM software without losing levels of detail and information.