CoSMoS (Coastal Storm Modeling System) Southern California v3.0 Phase 2 runup projections

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Frequently anticipated questions:

What does this data set describe?

CoSMoS (Coastal Storm Modeling System) Southern California v3.0 Phase 2 runup projections
Geographic extent of projected runup associated with the sea-level rise and storm condition indicated. The Coastal Storm Modeling System (CoSMoS) makes detailed predictions (meter-scale) over large geographic scales (100s of kilometers) of storm-induced coastal flooding and erosion for both current and future sea-level rise (SLR) scenarios. CoSMoS v3.0 for Southern California shows projections for future climate scenarios (sea-level rise and storms) to provide emergency responders and coastal planners with critical storm-hazards information that can be used to increase public safety, mitigate physical damages, and more effectively manage and allocate resources within complex coastal settings. Model details and data sources are outlined in CoSMoS_3.0_Phase_2_Southern_California_Bight:_Summary_of_data_and_methods (available at Phase 2 data for Southern California include flood-hazard information for the coast from the border of Mexico to Pt. Conception. Several changes from Phase 1 projections are reflected in many areas; please read the Summary of methods and inspect output carefully. Data are complete for the information presented.
This work is one portion of ongoing modeling efforts for California and the western United States. For information on data sources and details on methodology, see For more information on CoSMoS implementation, see
  1. How might this data set be cited?
    Barnard, Patrick, Erikson, Li, Foxgrover, Amy, O'Neill, Andrea, and Herdman, Liv, 2017, CoSMoS (Coastal Storm Modeling System) Southern California v3.0 Phase 2 runup projections: data release DOI:10.5066/F7T151Q4, U.S. Geological Survey, Pacific Coastal and Marine Science Center Santa Cruz, California.

    Online Links:

    This is part of the following larger work.

    Barnard, Patrick L, Erikson, Li H, Foxgrover, Amy C, Limber, Patrick W, O'Neill, Andrea C, and Vitousek, Sean, 2018, Coastal Storm Modeling System (CoSMoS) for Southern California, v3.0, Phase 2: data release doi:10.5066/F7T151Q4, U.S. Geological Survey, Pacific Coastal and Marine Science Center, Santa Cruz, California.

    Online Links:

  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -120.81115722553
    East_Bounding_Coordinate: -116.66931152258
    North_Bounding_Coordinate: 34.687068180405
    South_Bounding_Coordinate: 32.546444355161
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
    Beginning_Date: 10-Dec-2015
    Ending_Date: 25-Jun-2017
    oldest dataset used through publication date
  5. What is the general form of this data set?
    Geospatial_Data_Presentation_Form: Runup hazard projection data in shapefile formats
  6. How does the data set represent geographic features?
    1. How are geographic features stored in the data set?
      This is a Point data set. It contains the following vector data types (SDTS terminology):
      • Entity point (4364)
    2. What coordinate system is used to represent geographic features?
      Grid_Coordinate_System_Name: Universal Transverse Mercator
      UTM_Zone_Number: 11
      Scale_Factor_at_Central_Meridian: 0.999600
      Longitude_of_Central_Meridian: -100.000000
      Latitude_of_Projection_Origin: 0.000000
      False_Easting: 500000.000000
      False_Northing: 0.000000
      Planar coordinates are encoded using row and column
      Abscissae (x-coordinates) are specified to the nearest 2.000000
      Ordinates (y-coordinates) are specified to the nearest 2.000000
      Planar coordinates are specified in meters
      The horizontal datum used is North American Datum 1983 (NSRS2007).
      The ellipsoid used is Geodetic Reference System 80.
      The semi-major axis of the ellipsoid used is 6378137.000000.
      The flattening of the ellipsoid used is 1/298.257222.
      Depth_Datum_Name: NAVD88
      Depth_Resolution: 2.0
      Depth_Distance_Units: meters
      Depth_Encoding_Method: Implicit coordinate
  7. How does the data set describe geographic features?
    CoSMoS v3.0 Phase 2 in Southern California
    CoSMoS Phase 2 runup projections (Source: originators at United States Geological Survey, Pacific Coastal and Marine Science Center)
    Wave-runup extent for given sea-level rise (SLR) value and storm condition along high-resolution (2 m) cross-sectional transects
    extent of runup (Source: model derived) geographic extent of projected wave runup associated with sea-level rise and storm conditions indicated

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
    • Patrick Barnard
    • Li Erikson
    • Amy Foxgrover
    • Andrea O'Neill
    • Liv Herdman
  2. Who also contributed to the data set?
  3. To whom should users address questions about the data?
    Erikson, Li
    U.S. Geological Survey, Pacific Coastal and Marine Science Center
    2885 Mission Street
    Santa Cruz, CA

    831-460-7563 (voice)
    831-427-4748 (FAX)

Why was the data set created?

These data are intended for policy makers, resource managers, science researchers, students, and the general public. These data can be used with geographic information systems or other software to identify and assess possible areas of vulnerability. These data are not intended to be used for navigation.

How was the data set created?

  1. From what previous works were the data drawn?
    Summary of methods (source 1 of 1)
    Barnard, Patrick, Erikson, Li, Foxgrover, Amy, O'Neill, Andrea, and Herdman, Liv, 2017, CoSMoS_3.0_Phase_2_Southern_California_Bight:_Summary_of_data_and_methods: U.S. Geological Survey, Coastal and Marine Geology, Pacific Coastal and Marine Science Center Santa Cruz, California.

    Online Links:

    Type_of_Source_Media: online
    Complete explanation of data and methodology used to create model
  2. How were the data generated, processed, and modified?
    Date: 28-Feb-2015 (process 1 of 5)
    Populated Delft-3D grid bathymetry and created digital elevation model (DEM). See Summary of methods for information on elevation data and grid structure.
    Date: 01-May-2015 (process 2 of 5)
    Finished initial grid and FLOW-WAVE model structure within Delft-3D. Finished test storm (January 2010 storm including tides, waves, wind, and pressure) and tide scenarios (no atmospheric forcing, FLOW only) with initial QC checks. Checks included quantitative comparisons to tide station water levels within Southern California study area and output comparisons between model versions to determine model accuracy and consistency. See Summary of methods for information on model structure and data used.
    Date: 01-Apr-2016 (process 3 of 5)
    Determined regional 100-year, 20-year, and annual storm events, as well as average conditions for study area. Generated storm-event boundary conditions for Tier I/II simulations. See Summary of methods for information on model structure and outputs.
    Date: 15-May-2016 (process 4 of 5)
    Began merging long-term shoreline and cliff erosion projections to create cohesive depiction of coastal evolution for each SLR scenario. Tier II model output used as conditions for XBeach projections along evolved cross-shore transects. Began post-processing Delft-3D and XBeach output within Matlab (v. 2015b) to make spatially cohesive flood projection. See Summary of methods for information on model structure and outputs.
    Date: 14-Aug-2018 (process 5 of 5)
    Metadata was modified to add or correct the Larger_Work section, and to correct the link(s) to the Methods Summary pdf so that it points to the new location of the file. No data information was changed. Person who carried out this activity:
    Susan A Cochran
    U.S. Geological Survey, Pacific Coastal and Marine Science Center
    2885 Mission Street
    Santa Cruz, CA

    (831) 460-7545 (voice)
  3. What similar or related data should the user be aware of?

How reliable are the data; what problems remain in the data set?

  1. How well have the observations been checked?
    Attribute values are extents of wave runup due to plausible sea-level rise and future storm conditions and therefore cannot be validated against observations. The projections were generated using the latest downscaled climate projections for Southern California and a range of potential sea-level rise predictions as input to calibrated hydrodynamic and wave propagation models.
  2. How accurate are the geographic locations?
    Data are concurrent with topobathymetric DEM locations.
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
    Dataset is considered complete for the information presented (as described in the Summary of methods) and will be updated as necessary as improvements are developed. Users are advised to read the metadata record and Summary of methods carefully for additional details.
  5. How consistent are the relationships among the observations, including topology?
    Data have undergone quality checks and meet standards.

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?
Access_Constraints: none
USGS-authored or produced data and information are in the public domain from the U.S. Government and are freely redistributable with proper metadata and source attribution. Please recognize and acknowledge the U.S. Geological Survey as the originator(s) of the dataset and in products derived from these data.
  1. Who distributes the data set? (Distributor 1 of 1)
    U.S. Geological Survey - ScienceBase
    Denver Federal Center, Building 810, Mail Stop 302
    Denver, CO

    1-888-275-8747 (voice)
  2. What's the catalog number I need to order this data set? File (CoSMoS_v3_Phase2_runup_hazards.ZIP) contains runup-hazard projections for sea-level rise and storm scenarios indicated.
  3. What legal disclaimers am I supposed to read?
    Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty.
  4. How can I download or order the data?

Who wrote the metadata?

Last modified: 14-Aug-2018
Metadata author:
Andrea O'Neill
U.S. Geological Survey, Pacific Coastal and Marine Science Center
2885 Mission Street
Santa Cruz, CA

831-460-7586 (voice)
831-427-4748 (FAX)
Metadata standard:
Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)

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