Interagency Development of a Reference Set of Watersheds for the United States WBD
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SUBCOMMITTEE spatial water data Interagency Development of a Reference Set of Watersheds for the United States WBD
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Interagency Development of a Reference Set of Watersheds for the United States WBD. Hydrologic Units. 2-digit= 1st level = 22 regions. 4-digit= 2nd level = 222 subregions. 6-digit= 3rd level = 789 accounting. 8-digit= 4th level = 2223 cataloging. new!. - PowerPoint PPT Presentation
Transcript of Interagency Development of a Reference Set of Watersheds for the United States WBD
SUBCOMMITTEEspatial water data
Interagency Development of a Reference Set of Watersheds for the
United StatesWBD
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Hydrologic Units2-digit= 1st level = 22 regions
4-digit= 2nd level = 222 subregions
6-digit= 3rd level = 789 accounting
8-digit= 4th level = 2223 cataloging
10-digit= 5th level = ~22,000 watersheds
12-digit= 6th level = ~160,000 subwatersheds
new!
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Project Status
GOAL: Initial “draft” completed
December 2002
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Karst in Kentucky:Fifty-five percent of the state
has potential for karst.Areas shown in red have high potential for karst Areas shown in green have moderate potential for karst Areas shown in blue have limited potential for karst
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Areas of Shallow Soluble Bedrock in the Conterminous States
20 percent of the area of the 48 states is underlain by karst.
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Hydrologic Units of the Big Spring Basin, Missouri
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Vision:Follow a drop of water from where it falls on the land, to the stream, and all the way to the ocean.
WBD, a “key” part . . .
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PROBLEMS IN COASTAL AREASPROBLEMS IN COASTAL AREAS
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Subcommitteeon Spatial
Water Data
GuidelinesGuidelinesWork GroupWork Group
Coastal Coastal WatershedsWatersheds
Work GroupWork Group
FGDCHUC Interagency
Guideline
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Coastal Coastal WorkgroupWorkgroupMeeting, March, 2000Meeting, March, 2000
&&Meeting, August , 2000Meeting, August , 2000
&&Meeting, April 2001Meeting, April 2001
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coastal coastal delineation delineation optionsoptions
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“land limited”
coastline coastline dependantdependant
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“sphere of influence”
coastline coastline independentindependent
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“whole islandapproach”
coastline coastline independentindependent
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GeomorphologyGeomorphology
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Issues to be resolved• Coastline – can watersheds be independent of
coastline?• Estuarine systems – no clear hydrologic controls
of flow.• Deltaic coastlines – streams do not converge to a
point.• Barrier Islands – are they their own hydrologic
unit or defined by area of influence?• Island Groups – (e.g. FL Keys, Pacific Islands,
Aleutian, Tongas Nat. Forest)
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NOAA/NOS Implementation
• Pilots• Coastal delineation guidance• state/coast implementation
– Assisting state groups– Workshops– Data and data manipulation– One-on-one with States
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