Coastal Work Group Meeting April 11, 2001
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Transcript of Coastal Work Group Meeting April 11, 2001
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Coastal Work Group MeetingApril 11, 2001
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FGDC
ACWI
SubcommitteeSubcommitteeon Spatialon Spatial
Water DataWater Data(FACA)(FACA)
NRCS
USGSNOAA
EPA
USFS
TXTX
NSGICNSGIC
ASCEASCE
COEFEMA
BLM
NWS
TVA
CACA
AKAK
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Subcommitteeon Spatial
Water Data
GuidelinesGuidelinesWork GroupWork Group
Coastal WatershedsCoastal WatershedsWork GroupWork Group
FGDCHUC Interagency
Guideline
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Guidelines Guidelines WorkgroupWorkgroupMeeting, April 10&11, Meeting, April 10&11,
20002000
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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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HUC History• WRC 1960’s• Hydrologic Units 1970’s• NRCS pioneer late 80’s & early 90’s• USGS, BLM, USFS review• Subcommittee 2000
– Many agencies helping to build high resolution datasets
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Watershed Boundary Dataset
WBD
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Integration of key Spatial Water Datasets
• National Hydrography Dataset (NHD)
• Watershed Boundary Dataset (WBD)
• National Elevation Dataset (NED)
• Hydrologic Derivatives (NED-H)
focus:
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Partnering Agencies
• NRCS• USGS• USFS• NWS• EPA• State & Regional Agencies• Water Resource Consortium
No one agency can do this by themselves!
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Methods / Approachesto delineating
watersheds/subwatersheds
• manual• semi-automated
(NED/NED-H)–QA, delineate some/many HUCs
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MANUAL vs AUTOMATED
don’t knowmanualautomated
Interior of U.S. is getting done
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NEDNEDNational Elevation DatasetNational Elevation Dataset
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National Weather Service
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5000pixels2 sq.miles!
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coastal coastal delineation delineation Options?Options?
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Carto-Carto-based based 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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Geologic Geologic process process BasedBasedoptionsoptions
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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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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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Target Dates:• Jan’01 “draft” Unified Guideline into
Subcommittee and FGDC review– “place holder” in Unified Guideline
• Sept’01 “coastal guideline” addendum into review
• Sept’01 submission as FGDC Standard Guideline
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For additional information visit...
water.usgs.gov/wicp www.fgdc.gov www.ftw.nrcs.usda.govhttp://www.ftw.nrcs.usda.gov/huc_data.html
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