This document presents the mitigation study for the CBD area of Darwin, performed by the High Performance Architecture Group of UNSW, Faculty of Built Environment.The first part of the report includes the methods and the results of the terrestrial and aerial monitoring campaign, the evaluation of the magnitude of the Urban Heat Island (UHI) and finally the main conclusions on the climatic context characterized with the monitoring.
The second part presents initially an introduction to the various available mitigation technologies, and then the methodology and the results of the considered mitigation scenarios. In total, thirteen mitigation scenarios have been developed and evaluated in details. In parallel, the existing thermal environment has been fully evaluated for comparison reasons. Advanced simulation techniques have been used and the distribution of the ambient temperature, surface temperature and wind speed have been fully calculated. The air temperature has been normalized to standard pressure conditions (referred to as potential temperature), so as to allow comparisons between the conditions at different elevations and in different scenarios. The spatial distribution of the potential temperature decrease has been calculated for each scenario. A gross estimation of the cost associated with each scenario, is provided.
The last part of the document includes the proposed specifications for each of the mitigation scenarios, as well as the conclusions of the study.