San Francisco Bay Region Landslide Folio Part E - Map of debris-flow source areas in the San Francisco Bay region, California

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Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: R.C. Wilson
Originator: A.S. Jayko
Publication_Date: 1997
Title:
San Francisco Bay Region Landslide Folio Part E - Map of debris-flow source areas in the San Francisco Bay region, California
Geospatial_Data_Presentation_Form: map
Series_Information:
Series_Name: U.S. Geological Survey Open-File Report
Issue_Identification: 97-0745-F
Other_Citation_Details:
ARC/INFO vector COVERAGE format (<1MB for entire region) and raster GRID format (21MB). Plotfiles in PostScript also available.
Online_Linkage: http://pubs.usgs.gov/of/1997/of97-745/of97-745f.html
Description:
Abstract:
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.
Purpose:
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.
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 1997
Currentness_Reference: publication date
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -123.678
East_Bounding_Coordinate: -120.975
North_Bounding_Coordinate: 38.888
South_Bounding_Coordinate: 36.85
Keywords:
Theme:
Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: geology
Theme_Keyword: geologic maps
Theme_Keyword: landslides
Theme_Keyword: surficial geologic units
Theme_Keyword: geologic history
Theme_Keyword: geospatial datasets
Theme:
Theme_Keyword_Thesaurus: National Geologic Map Database Catalog themes, augmented
Theme_Keyword: 3400 - Graphical
Theme_Keyword: 3100 - Vector
Theme_Keyword: 3420 - PostScript
Theme_Keyword: 3110 - ESRI
Theme_Keyword: 3112 - export
Theme_Keyword: 3200 - Raster
Theme_Keyword: 1500 - Hazards
Theme_Keyword: 1503 - Landslides
Theme_Keyword: 3220 - Grid
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Categories
Theme_Keyword: geoscientificInformation
Place:
Place_Keyword_Thesaurus: Augmented FIPS 10-4 and FIPS 6-4
Place_Keyword: f06001 = Alameda
Place_Keyword: f06013 = Contra Costa
Place_Keyword: f06041 = Marin
Place_Keyword: f06055 = Napa
Place_Keyword: f06085 = Santa Clara
Place_Keyword: f06087 = Santa Cruz
Place_Keyword: f06075 = San Francisco
Place_Keyword: f06081 = San Mateo
Place_Keyword: f06095 = Solano
Place_Keyword: f06097 = Sonoma
Access_Constraints: none
Use_Constraints: none
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Jayko, Angela S
Contact_Organization: USGS-GEO-WRG-NGM
Contact_Address:
Address_Type: mailing and physical address
Address:
Mail Stop 975, USGS
345 Middlefield Road
City: Menlo Park
State_or_Province: CA
Postal_Code: 94025
Country: US
Contact_Voice_Telephone: 650-329-4926
Contact_Electronic_Mail_Address: ajayko@usgs.gov
Browse_Graphic:
Browse_Graphic_File_Name: http://pubs.usgs.gov/of/1997/of97-745/sfbr-rt6.pdf
Browse_Graphic_File_Description:
PDF representation of the map of 6-hour rainfall thresholds (1.1 megabytes)
Browse_Graphic_File_Type: PDF
Data_Set_Credit:
We thank Todd Fitzgibbon for digital review, and Russ Graymer and Scott Graham for cartographic assistance.
Native_Data_Set_Environment: ARC/INFO version 7.0.4
Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: vector
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: entity point
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: complete chain
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Grid_Coordinate_System:
Grid_Coordinate_System_Name: Universal Transverse Mercator
Universal_Transverse_Mercator:
UTM_Zone_Number: 10
Transverse_Mercator:
Scale_Factor_at_Central_Meridian: 0.9996
Longitude_of_Central_Meridian: -123
Latitude_of_Projection_Origin: 0.0
False_Easting: 500000
False_Northing: 0
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:
Abscissa_Resolution: unknown
Ordinate_Resolution: unknown
Planar_Distance_Units: meters
Geodetic_Model:
Horizontal_Datum_Name: North American Datum of 1927
Ellipsoid_Name: Clarke 1866
Semi-major_Axis: 6378206
Denominator_of_Flattening_Ratio: 294.98
Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: SFBR-RT24C.AAT
Entity_Type_Definition: 24 hour rainfall threshold value
Entity_Type_Definition_Source: OFR-97-0745-F
Attribute:
Attribute_Label: COUNTOUR
Attribute_Definition: Contour of rainfall threshold
Attribute_Definition_Source: OFR-97-0745-F
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 2.000
Range_Domain_Maximum: 10.500
Attribute_Units_of_Measure: inches
Attribute_Measurement_Resolution: 0.001
Detailed_Description:
Entity_Type:
Entity_Type_Label: SFBR-RT6C.AAT
Entity_Type_Definition: 6 hour rainfall threshold value
Entity_Type_Definition_Source: OFR-97-0745-F
Attribute:
Attribute_Label: COUNTOUR
Attribute_Definition: Contour of rainfall threshold
Attribute_Definition_Source: OFR-97-0745-F
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 1.000
Range_Domain_Maximum: 6.000
Attribute_Units_of_Measure: inches
Attribute_Measurement_Resolution: 0.001
Detailed_Description:
Entity_Type:
Entity_Type_Label: SFBR-RTG.PAT
Entity_Type_Definition:
Point coverage showing rain gage locations, station identifier, average number of rainy days, and mean annual precipitation
Entity_Type_Definition_Source: OFR-97-745-F
Attribute:
Attribute_Label: LOCATION
Attribute_Definition: Feature name
Attribute_Definition_Source: OFR-97-745-F
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Santa Cruz
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Ben Lomond 4
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Antioch
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Berkeley
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Black Mnt 2WSW
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Calaveras Res.
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Half Moon Bay
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Hamilton AFB
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Kentfield
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: La Honda
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Livermore
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Los Gatos
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Los Gatos 4SW
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Morgan Hill 2E
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Mt. Diablo Jnct.
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Mt. Hamilton
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Muir Woods
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Newark
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Oakland AP
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Occidental
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Pacifica
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Petaluma Fire Stn
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Redwood City
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Richmond
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: SF Mission Dol.
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: SFO
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: San Gregorio
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: San Jose
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: San RAfael Cif-Ctr
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Up S Leandro Flt
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Walnut Creek 2ESE
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Woodside F.S.
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Wrights
Attribute:
Attribute_Label: RAINDAYS
Attribute_Definition: Mean annual number of rainy days
Attribute_Definition_Source: OFR-97-0745-F
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 64.1
Range_Domain_Maximum: 95.0
Attribute_Units_of_Measure: days
Attribute_Measurement_Resolution: 0.1
Attribute:
Attribute_Label: MAP
Attribute_Definition: Mean Annual Precipitation
Attribute_Definition_Source: OFR-97-745-F
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 12.38
Range_Domain_Maximum: 56.25
Attribute_Units_of_Measure: inches
Attribute_Measurement_Resolution: 0.01
Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: USGS Information Services
Contact_Address:
Address_Type: mailing
Address: Box 25286, Denver Federal Center
City: Denver
State_or_Province: Colorado
Postal_Code: 80255-0046
Country: USA
Contact_Voice_Telephone: 1-888-ASK-USGS
Contact_Facsimile_Telephone: 1-303-202-4695
Contact_Electronic_Mail_Address: infoservices@usgs.gov
Resource_Description: US Geological Survey Open-File Report 97-0745-F
Distribution_Liability:
This report is preliminary and has not been reviewed for conformity with U.S. Geological Survey editorial standards or with the North American Stratigraphic Code. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
This database, identified as "Preliminary Maps Showing Rainfall Thresholds for Debris-Flow Activity, San Francisco Bay Region, California," has been approved for release and publication by the Director of the USGS. Although this database has been subjected to rigorous review and is substantially complete, the USGS reserves the right to revise the data pursuant to further analysis and review. Furthermore, it is released on condition that neither the USGS nor the United States Government may be held liable for any damages resulting from its authorized or unauthorized use.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: ARCE
Format_Version_Number: 7.x
Format_Information_Content:
ARC/INFO export file	Description of Coverage

sfbr-rt24c.e00		Line coverage showing contours of 24 hour rainfall threshold for debris flows.
sfbr-rt6c.e00		Line coverage showing contours of 6 hour rainfall threshold for debris flows.
sfbr-rtg.e00		Point coverage showing rain gage locations, station identifier, average number of rainy days, and mean annual precipitation.
sfbr-rta.e00		Point coverage showing the location of ALERT STATIONS and station identifiers
File_Decompression_Technique: gzip -d
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Digital_Form:
Digital_Transfer_Information:
Format_Name: ArcInfo Grid
Format_Version_Number: 7.x
Format_Information_Content:
ARC/INFO GRIDS (Tar)	Description of GRID files

sfbr-rt24.tar		Arc/Info grid showing 24 hour rainfall threshold for debris flows
sfbr-rt6.tar		Arc/Info grid showing 6 hour rainfall threshold for debris flows
File_Decompression_Technique: gzip -d
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Fees: none
Metadata_Reference_Information:
Metadata_Date: 20160614
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Peter N Schweitzer
Contact_Organization: USGS Midwest Area
Contact_Position:
Collection manager, USGS Geoscience Data Clearinghouse, http://geo-nsdi.er.usgs.gov/
Contact_Address:
Address_Type: mailing address
Address:
Mail Stop 954
12201 Sunrise Valley Dr
City: Reston
State_or_Province: VA
Postal_Code: 20192-0002
Country: USA
Contact_Voice_Telephone: 703-648-6533
Contact_Facsimile_Telephone: 703-648-6252
Contact_Electronic_Mail_Address: pschweitzer@usgs.gov
Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998

This page is <https://geo-nsdi.er.usgs.gov/metadata/open-file/97-745/f/metadata.html>
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