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!.

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Hydrologic Units for the United States

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!

10-digit= 5th level = ~22,000 watersheds

12-digit= 6th level = ~160,000 subwatersheds


GOAL: for the United StatesInitial “draft” completed

December 2002

Project

Status


Karst in kentucky fifty five percent of the state has potential for karst
Karst in Kentucky: for the United StatesFifty-five percent of the statehas 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


Areas of Shallow Soluble Bedrock in the for the United States

Conterminous States

20 percent of the area of the 48 states is underlain by karst.


Hydrologic Units for the United States

of the Big Spring Basin, Missouri


Vision

WBD, a “key” part . . . for the United States

Vision:

Follow a drop of water from where it falls on the land, to the stream, and all the way to the ocean.


Subcommittee for the United States

on Spatial

Water Data

Coastal

Watersheds

Work Group

Guidelines

Work Group

FGDC

HUC Interagency

Guideline


SUBCOMMITTEE for the United States

Coastal Workgroup

Meeting, March, 2000

&

Meeting, August , 2000

&

Meeting, April 2001


coastal for the United States

delineation

options


coastline for the United States

dependant

“land limited”


coastline for the United States

independent

“sphere of

influence”


coastline for the United States

independent

“whole island

approach”


Geomorphology
Geomorphology for the United States


Issues to be resolved
Issues to be resolved for the United States

  • 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)


Noaa nos implementation
NOAA/NOS Implementation for the United States

  • Pilots

  • Coastal delineation guidance

  • state/coast implementation

    • Assisting state groups

      • Workshops

      • Data and data manipulation

      • One-on-one with States


the end for the United States


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