Development and Application of Urban Micro-Climate Management System for Creating Low-Carbon and Green City

摘要

The Republic of Korea has established a diversity of strategies to cope with the climate change through a new policy paradigm called 'low-carbon green growth' since the past 2008, and it is being realized. This new paradigm suggested a far-reaching developmental guideline of low-carbon and green city creation, and for its concrete realization appeared the very Urban Renaissance Project. This study is the result drawn through this Project, and its ultimate purpose is to develop a system that can compare & analyze the degree of micro-climate change consequent upon diverse planning elements in a project target site. Actually, it's true the elements belonging to micro-climate are really diverse. However, this study carried out its research by confining the micro-climate to wind and temperature for the sake of realizable possibility and concreteness. As a case target site for system evaluation, this study set the Urban Renaissance Zone in Gwangju Metropolitan City of central district of Korea. The developmental contents of the system and system evaluation results are summed up as follows: First, this study designed the urban micro-climate management system so that macro-scale analysis module and micro-scale analysis module can be interlocked on the basis of the 3-dimensional virtual machine, through which it's possible to analyze cold wind formation & its flow at a wide area level and also to analyze the wind flows at a microscopic level. Second, this study designed the system composition by dividing it roughly into data sector, analysis sector and expression sector for making it possible for its users to handle with ease. Third, this study dealt with system management process. In all planning process, this study preferentially conducted the analysis of cold wind formation and wind flows at a wide area level, on the basis of which this study conducted the analysis of wind flows at a microscopic level, and then finally drew the optimum alternative for creating low-carbon and green city. Fourth, this study drew the results of Pilot Study for evaluating the urban micro-climate system. First, there increased the wind by 0.6 m/s, and decreased the temperature by 0.4 °C through the creation of Traditional Theme Street. In case of Streamlet Street, there increased the wind 0.12 m/s, and decreased the temperature by 0.3 °C. In addition, in case of Central Square, there increased the wind by 0.26 m/s, and decreased the temperature by 1.0 °C. Additionally, through the creation of Waterfront Park, there appeared the greatest increase in the wind by 0.99 m/s while the temperature was found to decrease the most by 0.7 °C, showing that green space combined with waterfront creation was the most effective in improving micro-climate. Through the results mentioned above, this study was able to understand the potential for the stability & applicability of the Urban Micro-Climate Management System. Nevertheless, this research thinks that should the reliability in the drawn result value and speed for drawing the analysis value back up, it could be a system with higher practical use, and additionally, if the practical function like the analysis of greenhouse gas emissions should be added, the effective value of this system would be more augmented.