Data Set Citation:
When using this data, please cite the data package:
Stoms D.
POD! GIS Shapefile of 50km buffer of the Upper San Francisco Estuary
stoms.10.5 (https://knb.ecoinformatics.org:443/knb/metacat/stoms.10.5/nceas)
General Information:
Title:POD! GIS Shapefile of 50km buffer of the Upper San Francisco Estuary
Identifier:stoms.10
Abstract:
This is an ESRI (ArcGIS) shapefile of a 50 km buffer surrounding the Upper San Francisco Estuary hydrodynamic subregions (see GIS Shapefile of Hydrodynamic Subregions of the Upper San Francisco Estuary data package). Contaminants can also be imported to the Estuary from upstream sources. As a rule-of-thumb, water travels approximately 50 km (30 miles) in a day. Therefore I delineated a drainage area that extends 50 km upstream from the boundary of the subregions (or until reaching the watershed divide where streams drain the western slope of the Coast Ranges directly into San Francisco Bay. This buffer area does not overlap with or include the hydrodynamic subregions.
Keywords:
  • estuary
  • GIS
  • watershed
Data Table, Image, and Other Data Details:
Metadata download: Ecological Metadata Language (EML) File
Data Table:50km Buffer of Upper San Francisco Estuary ( View Metadata | Download File download)

Involved Parties

Data Set Creators:
Individual:Dr. David Stoms
Organization:NCEAS 12192: Fleishman: Ecosystem analysis of pelagic organism declines in the Upper San Francisco Estuary
Position:Associate Researcher
Address:
Donald Bren School of Environmental Science and Management,
Santa Barbara, California 93106-5131 USA
Phone:
805.893.7655 (voice)
Email Address:
stoms@bren.ucsb.edu
Web Address:
http://www.biogeog.ucsb.edu/
Data Set Contacts:
Individual:Dr. David Stoms
Organization:NCEAS 12192: Fleishman: Ecosystem analysis of pelagic organism declines in the Upper San Francisco Estuary
Position:Associate Researcher
Address:
Donald Bren School of Environmental Science and Management,
Santa Barbara, California 93106-5131 USA
Phone:
805.893.7655 (voice)
Email Address:
stoms@bren.ucsb.edu
Web Address:
http://www.biogeog.ucsb.edu/

Data Set Characteristics

Geographic Region:
Geographic Description:San Francisco Bay-Delta
Bounding Coordinates:
West:  -122.6  degrees
East:  -121.1  degrees
North:  38.6  degrees
South:  37.7  degrees
Time Period:
Date:
2008

Sampling, Processing and Quality Control Methods

Step by Step Procedures
Step 1:  
Description:

Buffer subregions

The GIS Shapefile of Hydrodynamic Subregions of the Upper San Francisco Estuary layer was buffered to a distance of 50km (approximately one day's travel distance for water), (or until reaching the watershed divide where streams drain the western slope of the Coast Ranges directly into San Francisco Bay. The area of the Hydrodynamic Subregions was removed from this shapefile, leaving a "donut" polygon surrounding the subregions.

Data Set Usage Rights

This layer can be shared freely within the public scientific domain. It is intended to provide a general spatial framework for assessment of land use and other environmental effects on the Upper San Francisco estuary. It is not intended to be used for land use or regulatory decisions. The boundaries are only approximations made by buffering a shapefile derived from a small scale drawing.
Access Control:
Auth System:knb
Order:denyFirst
Metadata download: Ecological Metadata Language (EML) File