Putting the power in plants : using green infrastructure to reduce nonpoint source pollution in aquatic ecosystems in the urban center of Dublin

Abstract: Coastal ecosystems are some of the most productive, and most at risk, in the world. These ecosystems are at risk due to the high levels of pollution entering the system. Most of this pollution comes from either run off or atmospheric deposition. There are a few ways in which this pollution could be tackled without a complete overhaul of societal systems, the most common solutions being grey or green infrastructure. Green infrastructure is often preferable to grey infrastructure due to its adaptability, longevity, and the multiple benefits it can bring to an area. Using Dublin as a representative urban area, this paper makes a case for reducing nonpoint source pollution through the implementation of green infrastructure methods. Complexity theory is highlighted to show how cities are complex adaptive systems that require flexible infrastructure to adapt to the evolving problems. DPSIR is used as a framework in this thesis to identify the main causes of pollution. qGIS is utilized to show the different land use in Dublin and potential areas for green infrastructure-based projects. Phytoremediation, green roofs, and living green walls are suggested to be implemented to reduce the flooding potential of the city and provide additional pollution minimizing qualities. In addition, a combination top-down and bottom-up approach for adjusting the social norms to rely more heavily on green infrastructure in the future is suggested.