Transcript Bridging the Past, Present, and Future Through Local Efforts

California’s North Coast
Region GIS Layers
Lorri Peltz-Lewis
U.S. Bureau of Reclamation
May 1, 2002
Streamflow and Water Availability
Estimates in Ungaged Streams
Watershed Basin Characteristics:
Total Drainage, Contributing Drainage, Non-Contributing
Drainage, Perimeter, Shape Factors, Effective Width,
Compactness, Elongation, Relief, Relative Relief, Total
Stream Length, Main Channel Length, Channel Slope,
Basin Slope, Basin Length, Drainage Density, etc.
Geospatial Data Layers Reviewed Here:
National Elevation Data (NED) or Digital Elevation
Model (DEM)
National Hydrologic Database (NHD)
Elevation Derivatives for National Applications
(EDNA)
Watersheds - CALWATER
May 1, 2002
Streamflow and Water Availability
Estimates in Ungaged Streams
National Elevation Data (NED)
Seamless raster elevation database
Combination of 10 & 30 m –
final currently 30 m – future will be 10 m.
Processing to eliminate merge problems
Digital Elevation Model (DEM)
Raster elevation database
10 & 30 m data files
Tiled by quadrangle
Others:
LIDAR, SAR, RADAR, etc.
May 1, 2002
Streamflow and Water Availability
Estimates in Ungaged Streams
May 1, 2002
Streamflow and Water Availability
Estimates in Ungaged Streams
May 1, 2002
Streamflow and Water Availability
Estimates in Ungaged Streams
May 1, 2002
Streamflow and Water Availability
Estimates in Ungaged Streams
xxx
May 1, 2002
Streamflow and Water Availability
Estimates in Ungaged Streams
References:
Gesch, Dean et.al, 2002. The National Elevation Dataset, PE&RS January
2002.
www.asprs.org/asprs/publications/pe&rs/2002journal/january/highlight.html
Franken, S.K. et.al, 2001. Development of a National Seamless Database of
Topograhy and Hydrologic Deravatives, ESRI 2001 Users Conference
www.esri.com/library/userconf/proc01/professional/papers/pap730/p730.htm
http://edcnts12cr.usgs.gov/ned/
May 1, 2002
Streamflow and Water Availability
Estimates in Ungaged Streams
National Hydrologic Database (NHD)
Seamless vector hydrology database
representing surface hydrology
100K currently available, 24K under
development
Comprehensive inter-related relational
database.
http://nhd.usgs.gov/
May 1, 2002
Streamflow and Water Availability
Estimates in Ungaged Streams
May 1, 2002
Streamflow and Water Availability
Estimates in Ungaged Streams
May 1, 2002
Streamflow and Water Availability
Estimates in Ungaged Streams
May 1, 2002
Streamflow and Water Availability
Estimates in Ungaged Streams
Challenges for a national database – blank area is San Jose.
Hydrology disappears – red line is connector for unknown.
May 1, 2002
Streamflow and Water Availability
Estimates in Ungaged Streams
Elevation Derivatives for National
Applications (EDNA):
New Product!!
Systematic derivation of standard hydrologic
derivatives using NED and NHD
http://edcnts12cr.usgs.gov/ned-h/
May 1, 2002
Streamflow and Water Availability
Estimates in Ungaged Streams
Watersheds Basin Delineation:
USGS HUC 250K
Original delineations done by USGS
Problem areas – Central Valley
CALWATER 24K
Delineations for California
Not all watershed oriented,
some administrative boundaries
http://www.ca.nrcs.usda.gov/wps/calwater
CA delineations being reviewed following NRCS &
USGS national methodology.
May 1, 2002
Streamflow and Water Availability
Estimates in Ungaged Streams
HUC250 and CALWATER – status of
review here!!!
May 1, 2002
Streamflow and Water Availability
Estimates in Ungaged Streams
May 1, 2002
Streamflow and Water Availability
Estimates in Ungaged Streams
North Coast Watershed
Assessment Program
GIS Data and Synthesis
Chris Keithley
Utilization of high resolution GIS data.
May 1, 2002
Streamflow and Water Availability
Estimates in Ungaged Streams