Data Set Citation:
When using this data, please cite the data package:
Stoms D.
POD! GIS Shapefile of Hydrodynamic Subregions of the Upper San Francisco Estuary
stoms.9.6 (http://knb.ecoinformatics.org/knb/metacat/stoms.9.6/nceas)
General Information:
Title:POD! GIS Shapefile of Hydrodynamic Subregions of the Upper San Francisco Estuary
Identifier:stoms.9
Abstract:
This is an ESRI (ArcGIS) shapefile of the hydrodynamic subregions of the Upper San Francisco Estuary, California, as sketched conceptually by the Delta Regional Ecosystem Restoration Implementation Plan team (J. Burau, USGS, unpublished data). It was digitized from a drawing to allow for general level assessments of land use and other environmental effects within ecologically meaningful spatial units.
Keywords:
  • estuary
  • GIS
  • Pelagic Organism Decline
  • watersheds
Data Table, Image, and Other Data Details:
Metadata download: Ecological Metadata Language (EML) File
Data Table:Hydrodynamic Subregions Shapefile ( 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:

Digitize map

I digitized the boundaries of the subregions based on a graphic of a conceptual model developed by the Delta Regional Ecosystem Restoration Implementation Plan (DRERIP) team (J. Burau, U. S. Geological Survey, unpublished data). The foundation of the subregions layer was a GIS layer of the boundary of the legal Delta from the Department of Water Resources. I used highways and other geographic features to guide to digitize both the interior boundaries between subregions as well as the three downstream subregions of North Bay, Suisun Marsh, and Suisun Bay. Note that the interior boundaries are approximate, given the simplified boundaries provided in the conceptual model. Note too that the boundary between the Western Delta and the Suisun Bay subregions is not static, but is dynamically defined by the position of the 2-psu isohaline (termed “X2”) that shifts in response to freshwater flows. I assumed for this exploratory analysis that the boundary is fixed as digitized.

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 within 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 digitizing lines from a small scale drawing.
Access Control:
Auth System:knb
Order:denyFirst
Metadata download: Ecological Metadata Language (EML) File