Persisting Social Vulnerability, Stormwater Infrastructure, and Planning for Flooding and Resilience in Washington D.C.

Abstract

While Green Infrastructure (GI) has gained prominence in addressing climate change, particularly in flood prevention and other associated benefits. Limited empirical studies have explored its spatial distribution and temporal changes in relation to the whole stormwater infrastructure. This dissertation investigates the intersection of stormwater infrastructure, social vulnerability, and urban flood management strategies in Washington, D.C. The dissertation is composed of three studies. The first study employs geospatial exploration to assess the equitable allocation of stormwater infrastructure, considering historical discriminatory sewage services. Regression models reveal significant disparities in stormwater infrastructure distribution among communities with varying levels of social vulnerability, highlighting the inequitable distribution within urban areas. The study contributes valuable insights for stormwater management planning in the context of climate-related challenges.The second quantitative study focuses on the spatial and temporal evolution of GI distribution in Washington, D.C., utilizing spatial panel data analysis. Unlike previous cross-sectional snapshots, this study captures temporal trends in GI distribution in relation to social vulnerability. The findings, with potential implications for evidence-based policies, shed light on the evolving patterns of discriminatory distribution of GI and its relation to persistent social vulnerability. The third study employs an Environmental Justice (EJ) framework to critically analyze the urban flood management initiatives in Washington, D.C., specifically examining the Flood Task Force (FTF) action plan. The study uncovers limitations and potential exacerbations of place vulnerabilities within current plans through qualitative coding. This research contributes to the ongoing discourse on achieving more equitable and resilient urban flood management in the city, emphasizing the need for environmental justice considerations. The thorough examination of stormwater infrastructure, social vulnerability, and the initiatives of the DC Flood Task Force uncovers a tripartite phenomenon: 1) uneven distribution of stormwater infrastructure is influenced by social vulnerability, 2) temporally widening the gap in infrastructure among communities, and 3) overlooking social vulnerability and the unfair allocation of stormwater infrastructure in planning or policies could intensify place vulnerability.