coastal work group meeting april 11, 2001
DESCRIPTION
Coastal Work Group Meeting April 11, 2001. BLM. ACWI. NOAA. CA. USGS. FGDC. NSGIC. USFS. Subcommittee on Spatial Water Data (FACA). FEMA. TVA. COE. NRCS. TX. AK. EPA. ASCE. NWS. Subcommittee on Spatial Water Data. Coastal Watersheds Work Group. Guidelines Work Group. - PowerPoint PPT PresentationTRANSCRIPT
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SUBCOMMITTEESUBCOMMITTEEspatial water dataspatial water data
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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SUBCOMMITTEESUBCOMMITTEE
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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