Assessing Compound Flood Risk for the San Francisco Bay Area, California
Abstract/Contents
- Abstract
- As climate change causes sea levels to rise, increases precipitation variability, and leads to larger, more frequent storms, communities are faced with ever increasing risks from flooding. Communities require reliable assessment of the compound risk they face now and how that risk changes in the future to decide how to mitigate their flood risk. Many of the San Francisco Bay Area’s planning around climate hazard mitigation efforts focus on the threat faced by sea level rise. However, coastal, riverine, and pluvial (surface runoff) flooding can happen concurrently leading to a compound hazard that is rarely taken into account. The goal of this study is to integrate the effects of coastal, riverine, and pluvial hazards by using preexisting hazard models to develop a map of the compound flood hazard for San Mateo County California. Our research expands upon San Mateo County’s previous work combining coastal and pluvial flooding through Cal Adapt using 2-D Hydrologic Engineering Center- River Analysis System (HEC-RAS) models that project flood hazard data into the future for 2030 and 2070 using changes in predicted precipitation data and sea level rise. We found that compared to flood maps from FEMA and the USGS the added effects of fresh water to the coastal flooding and sea-level rise increased the inundation depth and extent along the coast by up to 7 feet by 2070. Further inland, the 2030 storm scenarios were deeper, but in some areas were less extensive while the 2070 storm scenarios had more extensive and deeper flood inundation in some areas by up to 2 feet. This highlights the importance of compound hazard in assessing flood risk as some risks would otherwise not be accounted for.
Description
| Type of resource | text |
|---|---|
| Date modified | December 5, 2022 |
| Publication date | June 11, 2022 |
Creators/Contributors
| Author | Davey, Laura |
|---|---|
| Thesis advisor | Ouyang, Derek |
| Thesis advisor | Serafin, Katherine |
| Thesis advisor | Suckale, Jenny |
Subjects
| Subject | Flooding, Compound Hazards, Hydraulic Modeling, Climate Change, Sea-level Rise, Precipitation |
|---|---|
| Genre | Text |
| Genre | Thesis |
Bibliographic information
Access conditions
- Use and reproduction
- User agrees that, where applicable, content will not be used to identify or to otherwise infringe the privacy or confidentiality rights of individuals. Content distributed via the Stanford Digital Repository may be subject to additional license and use restrictions applied by the depositor.
- License
- This work is licensed under a Creative Commons Attribution Non Commercial 4.0 International license (CC BY-NC).
Preferred citation
- Preferred citation
- Davey, L. (2022). Assessing Compound Flood Risk for the San Francisco Bay Area, California. Stanford Digital Repository. Available at https://purl.stanford.edu/rf146rn5630
Collection
Undergraduate Theses, Geophysics
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- Contact
- ldavey@stanford.edu
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