Entry_ID: (required)
Entry_Title: San Francisco Bay Region Landslide Folio Part E - Map of debris-flow source areas in the San Francisco Bay region, California
Group: Data_Set_Citation
  Originator(s): R.C. Wilson; A.S. Jayko
  Title: San Francisco Bay Region Landslide Folio Part E - Map of debris-flow source areas in the San Francisco Bay region, California
  Publication: U.S. Geological Survey Open-File Report
  Publication_Date: 1997
  Data_Presentation_Form: map
  URL: http://pubs.usgs.gov/of/1997/of97-745/of97-745f.html
End_Group
Keyword: geology
Keyword: geologic maps
Keyword: landslides
Keyword: surficial geologic units
Keyword: geologic history
Keyword: geospatial datasets
Group: Temporal_Coverage
  Start_date: 1997
  Stop_date: 1997
End_Group
Data_Set_Progress: Complete
Group: Spatial_Coverage
  Southernmost_Latitude: unknown
  Northernmost_Latitude: 38.5
  Westernmost_Longitude: unknown
  Easternmost_Longitude: unknown
End_Group
Location: 06001 = Alameda
Location: 06013 = Contra Costa
Location: 06041 = Marin
Location: 06055 = Napa
Location: 06085 = Santa Clara
Location: 06087 = Santa Cruz
Location: 06075 = San Francisco
Location: 06081 = San Mateo
Location: 06095 = Solano
Location: 06097 = Sonoma
Group: Data_Resolution
  Latitude_Resolution: unknown
  Longitude_Resolution: unknown
End_Group
  Access_Constraints: none
  Use_Constraints: none
Originating_Center: (required)
Group: Data_Center
  Data_Center_Name: USGS Information Services
  Dataset_ID: US Geological Survey Open-File Report 97-0745-F
Group: Data_Center_Contact
  Last_name: USGS Information Services
  First_name: N/A
  Email: infoservices@usgs.gov
  Phone: 1-888-ASK-USGS
  Group: Address
    Box 25286, Denver Federal Center
    Denver, Colorado 80255-0046
    USA
  End_Group
End_Group
End_Group
  Storage_Medium: ARC/INFO version 7.0.4
Group: Distribution
  Distribution_Media: online
  Distribution_Format : ARCE
  Fees: none
End_Group
Group: Distribution
  Distribution_Media: online
  Distribution_Format : ArcInfo Grid
  Fees: none
End_Group
Group: Multimedia_Sample
  URL: http://pubs.usgs.gov/of/1997/of97-745/sfbr-rt6.pdf
  Format: PDF
  Caption: PDF representation of the map of 6-hour rainfall thresholds (1.1 megabytes)
End_Group
Group: Reference
End_Group
Group: Summary
  The primary intended use of these maps  is to facilitate response
  planning for debris-flow related emergencies.  The  maps are
  intended to be used in conjunction with the debris-flow
  susceptibility map developed by Ellen and Mark (1997) in this same
  series.
  
  These maps show, for emergency service managers in the San Francisco
  Bay region, the threshold rainfall that may be capable of
  triggering a level of  debris-flow activity likely to threaten
  public safety.  The maps are products of  a continuing series of
  studies that began after a catastrophic storm on January  3-5, 1982
  triggered 18,000 debris flows in the San Francisco Bay region,
  causing  25 deaths and $66 million in property damage.  The
  threshold rainfall values  were estimated by re-evaluating a
  previous empirical analysis of data from  the 1982 storm, and other
  historical rainfall records, that normalized the  rainfall intensity
  data by dividing by the mean annual precipitation (MAP) of  the
  corresponding rain gage.  The present analysis also takes into
  account the  rainfall frequency, the mean annual number of days with
  non-zero rainfall  (#RDs), thereby adjusting for the difference in
  rainfall frequency between  windward-facing slopes where rainfall is
  orographically enhanced and  leeward-facing slopes and valleys that
  lie within rain shadows where  precipitation is reduced.   The
  debris-flow threshold maps were created by digitally combining an
  existing regional map of mean annual precipitation, a newly compiled
  data  set of #RDs from an analysis of long-term (20-40 years)
  records of daily rainfall  for 33 rain gages in the region, and the
  re-normalized thresholds from the  empirical analysis of historical
  storm data.
End_Group
DIF_Revision_Date: 20140731
Science_Review_Date: