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

Metadata:

• Identification_Information
• Spatial_Data_Organization_Information
• Spatial_Reference_Information
• Entity_and_Attribute_Information
• Distribution_Information
• Metadata_Reference_Information

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>

Keywords:

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, version 1.0

Place_Keyword: 06001 = Alameda

Place_Keyword: 06013 = Contra Costa

Place_Keyword: 06041 = Marin

Place_Keyword: 06055 = Napa

Place_Keyword: 06085 = Santa Clara

Place_Keyword: 06087 = Santa Cruz

Place_Keyword: 06075 = San Francisco

Place_Keyword: 06081 = San Mateo

Place_Keyword: 06095 = Solano

Place_Keyword: 06097 = Sonoma

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: unknown

East_Bounding_Coordinate: unknown

North_Bounding_Coordinate: 38.5

South_Bounding_Coordinate: unknown

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: Gzipped ARC/INFO export format files

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 utility is available free of charge over the Internet via links from the USGS Public Domain Software page:
<http://edcwww.cr.usgs.gov/doc/edchome/ndcdb/public.html>

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: <http://pubs.usgs.gov/of/1997/of97-745/of97-745f.html/>

Digital_Form:

Digital_Transfer_Information:

Format_Name: Gzipped TAR ARC/INFO raster GRID format

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 utility is available free of charge over the Internet via links from the USGS Public Domain Software page:
<http://edcwww.cr.usgs.gov/doc/edchome/ndcdb/public.html>

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: <http://pubs.usgs.gov/of/1997/of97-745/of97-745f.html/>

Fees:

Custom_Order_Process:

Export, TAR, PostScript, or Text files can be obtained by sending a tape with requestn and return address to:
San Francisco Bay Region Landslide Folio c/o Database Coordinator U.S. Geological Survey 345 Middlefield Road, MS 975 Menlo Park, CA 94025
Do NOT omit any part of this address!
The file (s) will be returned on the tape. The acceptable tape types are:
1/4 inch, 150MB cartridge tap 2.3 or 5.0 GB, 8 mm Exabyte tape.
In the request, be sure to include the Open-File Report number and the specific names of the file(s) that you want, using the names listed in the Report Contents section above. An Open-File Report number alone is not sufficient, because there are several parts to the report and they are available in different file types. If you are obtaining a plot file on tape to give to a vendor to plot, make sure that your vendor is capable of reading the tape type and file type (PostScript or PDF).

Metadata_Reference_Information:

Metadata_Date: 20000728

Metadata_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Jennifer Lenz

Contact_Organization: US Geological Survey

Contact_Address:

Address_Type: mailing

Address: 12201 Surise Valley Drive, Mail Stop 918

City: Reston

State_or_Province: VA

Postal_Code: 20192

Country: USA

Contact_Voice_Telephone: 703-648-6974

Contact_Facsimile_Telephone: 703-648-6560

Contact_Electronic_Mail_Address: pschweitzer@usgs.gov

Metadata_Standard_Name: Content for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998