Author(s): Dayeon Shin
Mentor(s): Dakota McCarty, Department of Environmental Science & Policy
AbstractI used the quantitative research method, which is public survey and data analysis, SHAP value identifying the most influential variables causing urban floods and collecting Seoul residents’ opinions.
So, in the results for the SHAP value, how the geographical elements affect the urban floods, so we can predict the urban flood based on the high influential elements rank. First is building_count, which is the most influential element with the high number of buildings affected by urban floods in the research areas. The second is the distance of road and river, which indicates that the more far from the road and river, it has less vulnerability in urban flood due to the aging or insufficient drainage systems, which means traditional draining focused on the fast draining. The downstream and NDBI which indicates the grey infrastructure were the following influential elements.
Next is the result for public acceptance from the survey. Over 50% of people do not believe Seoul’s current flood management strategies are effective, and do not trust local government authorities to effectively manage flood risks and people think that the Gangnam district office’s role is the most crucial. Additionally, through the survey, insufficient drainage systems, lack of green spaces, and inefficient urban planning were selected as top 3 challenges in the current flood management policy. Furthermore, the poor coordination among government agencies would be the main barrier.
In conclusion, making balance between green and grey infrastructure is a crucial solution and based on the former environmental policy development of Seoul, enforcement will be needed in making certain spaces for green in the building and parklet or using Chicago green alley as a green infrastructure can be applied as solutions to prevent it. No enforcement in constructing green spaces, no gangnam residents future safety.
These are my references, it was an honor to have this opportunity and thanks to huge support by Prof. McCarty, I hope this research contributes to the future flood prevention in Gangnam, Seoul.