USGS - science for a changing world

Pacific Coastal and Marine Science Center

Coastal Processes

CoSMoS 3.0: Southern California

In progress, preliminary data available fall 2015

Location map of Southern California work.

Above: Southern California study area

An updated Southern California project is targeted for completion in summer 2016. Preliminary data from a 100-year storm event and several sea level rise scenarios will be available late 2015. Funding provided from the California Coastal Conservancy, with additional support from the City of Imperial Beach and California Department of Fish and Wildlife, will stimulate this multi-agency collaboration featuring top coastal and climate scientists from Scripps, Oregon State University, private sector, and USGS. The work supports numerous local municipalities who will use the results to update their Local Coastal Plans to account for climate change impacts as mandated by the State of California.

Model enhancements for Southern California include:

  • Improved system methodology from CoSMoS 1.0 for more accurate flood projections in high-interest embayments and estuaries
  • Long-term coastal evolution projections for sandy beaches and cliffs produced from a collection of state-of-the-art models and extensive historical data
  • Downscaled winds from Global Climate Model (GCM) data for locally-generated seas and surge
  • Discharge from rivers for event response and long-term sediment supply
  • An improved baseline elevation DEM that incorporates recent LIDAR surveys collected by the California Coastal Conservancy.

Collaborative Studies: Partnering USGS projects will use hazard projections from CoSMoS 3.0 to pilot groundwater and socioeconomic impacts investigations throughout Southern California.

Content on this page requires a newer version of Adobe Flash Player.

Get Adobe Flash player

Above: A computationally-efficient one-line shoreline model used to determine long-term evolution of a sandy beach in CoSMoS 3.0. This one-line model is specifically developed for century-scale projections in Southern California.


Accessibility FOIA Privacy Policies and Notices logo U.S. Department of the Interior | U.S. Geological Survey
Site designed, created, and maintained by: Laura Zink Torresan
Questions to: Patrick Barnard
Page Last Modified: 6 July 2015 (lzt)