Wind Field Simulation Tools Assist in Conducting Heritage Impact Assessments

Abstract. Urban development, with its evolving streetscapes and new constructions, can significantly impact historically significant districts. To mitigate adverse effects, governments often implement Development Control Plans (DCPs) and mandate Heritage Impact Assessments (HIAs). However, the resulting changes to local wind environments and pedestrian comfort are frequently overlooked. Comfortable climatic conditions are crucial for enhancing the visitor experience at heritage sites, thereby boosting the economic contribution of cultural heritage. This study investigates this issue using Taiwan’s Control Yuan as a case study. Referencing the Dutch NEN 8100 wind comfort standard, we employed computational fluid dynamics (CFD) software (WindperfectDX® ) to analyze potential impacts. First, a 3D model of the site was created in SketchUp® . We then developed three distinct architectural proposals for a new building and simulated the resulting wind field for each design. The analysis focused on how each proposal altered wind speeds and turbulence around the historic building and adjacent roads. 
Our results showed varied outcomes: one design slightly increased wind speeds, while another maintained stable conditions. Notably, designs with sharp edges generated higher turbulence, whereas those with rounded corners reduced it. These findings underscore that the microclimatic impact of new developments on historical environments cannot be ignored. Therefore, a more careful and comprehensive evaluation of architectural design is essential during the planning stages to preserve the integrity and accessibility of our shared heritage.