USGS Launches New California Coastal Erosion Surveys
The agency is expanding its monitoring efforts to assess the impact of the upcoming 2026-2027 El Niño on state shorelines.
Updated on Oct. 20, 2026 in Geography
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The USGS is initiating new coastal surveys across California to measure erosion risks ahead of the 2026-2027 El Niño season. These assessments aim to quantify the impact of anticipated floods and heightened wave energy on state shorelines.
Why it matters
By tracking seasonal and long-term landform changes, the agency provides data necessary for storm planning and infrastructure protection. This research addresses the intersection of extreme weather and coastal stability.
The USGS maintains continuous data records at sites like Ocean Beach since 2004, while other locations like Santa Barbara saw program completion in 2024. These records provide the baseline for tracking sediment movement and beach morphology.
The players
USGS
A federal science agency that tracks natural hazards and landscape changes through long-term geological and hydrological observation programs.
The details
Researchers collect bathymetry data using personal watercraft to map the underwater terrain near the shore. Simultaneously, beach elevation is measured through a combination of aerial platforms, foot surveys, and all-terrain vehicles. These methods capture both the physical volume of sediment and the structural changes to the shoreline, which are influenced by seasonal cycles and extreme weather events like flooding at the San Lorenzo River mouth.
Timeline
2004: Ocean Beach monitoring program began.
2005: Monitoring began following the Santa Clara River flood.
2024: Santa Barbara monitoring program ended.
Fall 2026: New short-term coastal surveys are scheduled.
Spring 2027: Additional short-term coastal surveys are scheduled.
The Tech Race
This effort builds upon the established framework of the USGS coastal monitoring program to address localized erosion threats. It follows a multi-decade research trajectory aimed at mapping sediment delivery and shore morphology across the state.
These surveys will provide critical data for planners and residents near high-risk coastal zones in California. The findings will help inform preparations for potential flooding and erosion effects during the upcoming 2026-2027 El Niño season.
The takeaway
These surveys are essential for quantifying the physical impact of heightened wave energy on coastal infrastructure. Readers should watch for the release of findings after the spring 2027 survey cycle, which will detail the cumulative erosion across these study sites.
Further reading
For more on how landscape changes impact the region, see Geography.
Source note: This article includes information reported by USGS.
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