US Geological Survey

US Geological Survey

Cook Inlet Basin Study Unit – Hydrologic Unit Boundaries

nawqa_huc is a polygon coverage of hydrologic unit boundaries within the Cook Inlet Basin National Water-Quality Assessment (NAWQA) study area in southcentral Alaska. A hydrologic unit is a region or area bounded by a drainage divide and occupied by a drainage system. Each hydrologic unit (drainage area) boundary and an 8-digit name (huc.code) is from the report U.S. Geological Survey, 1987, Hydrologic unit map-1987-State of Alaska: U.S. Geological Survey map, 1 sheet.

The purpose of this coverage is to define the extent and boundaries of drainage systems within the Cook Inlet Basin. The hydrologic unit boundaries were drawn on the 1:250000 paper quadrangle maps. The boundaries were then digitized and entered into ARC-INFO. Using ARC-EDIT procedures, the data were edited where appropriate and then combined into one coverage.

Data and Resources

  • Download
    Hydrologic Unit Boundaries Coverage


  • View website
    Website :: National Water Quality Assessment (NAWQA)—Cook Inlet Basin Study Unit

  • View metadata
    Metadata :: Hydrologic Unit Boundaries of the Cook Inlet Basin

Status: Complete
Type: Data
End Date: 1997/04/24
Data Types: GIS
  • 01c8ceef3d596f40f05bf496ca00d929
    Published by Lisa
    2016-10-28 17:00:39 -0800
  • 01c8ceef3d596f40f05bf496ca00d929
    Updated by Lisa
    2016-10-28 17:00:35 -0800
  • Ee0a0a4e02f5cfa5b34a4bcad3d24f20
    Updated by Trail
    2015-07-18 17:45:21 -0800
  • Ee0a0a4e02f5cfa5b34a4bcad3d24f20
    Updated by Trail
    2015-07-18 01:26:12 -0800
  • Ee0a0a4e02f5cfa5b34a4bcad3d24f20
    New record created
    2015-07-13 23:04:54 -0800