Abstract
Abstract Environmental modelling requires, among other aspects, a description of the built geometry. However, the complexity of the urban tissue draws uncertainties about the building form and locations. Therefore, during the planning process generic simplified geometry models may be more appropriate than the detailed ones. This research shows a meta-analysis performed by comparing the results of detailed and simplified geometric models. The prediction deviations that may arise from using geometric simplifications on ENVI-met modelling were evaluated, considering the output data from different building typologies (one and ten-storey buildings) and urban scenarios (with and without internal squares). Three metrics were analysed: air temperature, wind speed, and sky view factor (SVF). These metrics were normalized between 0 and 1 for comparison and performance assessment. The results indicated that the most adequate simplification models are those that that have kept the building perimeter of the blocks unchanged in relation to the corresponding detailed models.
Highlights
Nowadays, a scenario of increasing urbanization is posed in which 50% of the world population already lives in urban areas, and this number is predicted to reach 66% in 2050 (UNITED..., 2015)
The prediction deviations caused by the use of geometric simplifications on ENVI-met modelling were presented below
The aim of this study was to assess the prediction deviation that may arise from using geometric simplifications on ENVI-met modelling, and verify if they could properly replace the detailed geometric models in ENVI-met simulation without significantly affecting its results
Summary
A scenario of increasing urbanization is posed in which 50% of the world population already lives in urban areas, and this number is predicted to reach 66% in 2050 (UNITED..., 2015). Regarding the use of climatological factors in urban planning, computational environmental simulation tools represent a great advance, as they are capable of predicting the urbanization impact of multiple urban design alternatives over the urban climate before its implementation. The ENVI-met V.4.1 software is a holistic three-dimensional non-hydrostatic model that is able to simulate the plant-surface-air interactions. It has been used for several types of urban analysis, among them, the assessment of the urban geometry impact on the thermal comfort and climate conditions by simulating hypothetical (ALI-TOUDERT; MAYER, 2006; KOCH et al, 2018) urban scenarios or multiple design alternative (GOLDBERG; KURBJUHN; BERNHOFER, 2013; MIDDEL et al, 2014; SOSA; CORREA; CANTÓN, 2018)
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