Service Description: The Shoreline Vulnerability Index helps figure out how different shoreline types around the Bay may be vulnerable to erosion and flooding. Shoreline adaptation projects will involve both maintaining and strengthening existing shorelines, as well as realigning and redesigning areas of the Bay shoreline. Understanding where stretches of the Bay’s shoreline are highly vulnerable to flooding and sea level rise can inform the prioritization, planning, and construction of shoreline protection projects. This project builds upon the Bay Shore Inventory created by the San Francisco Estuary Institute (SFEI), which inventoried 100 foot segments of elevated Bay shore features for all nine Bay Area counties. These elevated Bay shore features were mapped and classified as: levees, berms, embankments, transportation structures, wetlands, natural shoreline, channel openings, and water control structures.
For more information visit the following links:
ArcGIS Story Map: https://bcdc.maps.arcgis.com/apps/Cascade/index.html?appid=a90eb7b4eb7249809505e8d940bb2419
Methodology Document: http://www.adaptingtorisingtides.org/wp-content/uploads/2021/07/ShorelineVulnerabilityIndex_Methodology_2021.pdf
GitHub: https://github.com/BCDC-GIS/shoreline-vulnerability-index
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Supported query Formats: JSON
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Description: This San Francisco Bay Shoreline Vulnerability Index (Index) is a measure of shoreline vulnerability to erosion and/or overtopping due to extreme tides, waves, storm surges, and sea level rise. The Index gives a comprehensive look at how different sections of the Bay respond to storm surge, erosion from waves, and sea level rise. It ranks each shoreline segment’s vulnerability to impacts such as erosion and overtopping relative to other types of shoreline by by scoring characteristics that affect shoreline vulnerability. The Shoreline Vulnerability Index (SVI) uses the following 6 characteristics to determine shoreline vulnerability for the primary shoreline protection, which is the first elevated shoreline from the Bay. These characteristics are weighted in their importance towards shoreline vulnerability to flooding.
Shoreline Vulnerability Characteristics |
1. Vulnerability of shoreline type to flooding and sea level rise |
2. Adaptability to sea level rise by shoreline type |
3. Presence of fortification |
4. Presence of frontage and/or secondary shoreline protection |
5. Elevation |
6. Wave energy |
This work was created by SF Bay Conservation and Development Commission (BCDC), San Francisco Estuary Institute (SFEI) and Silvestrum.
BCDC (2021). Adapting To Rising Tides Shoreline Vulnerability Index; SF Bay [spatial data file]. SF Bay Conservation and Development Commission.
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Units: esriMeters
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