Abstract: This data layer is a merging of the Yukon River precipitation data for the Canadian Yukon only with Alaska precipitation data for Norton Sound and the US Yukon and Kuskokwim rivers. The USGS National Stream Quality Accounting Network (NASQAN) program studies the water quality of large rivers of the United States. From 2001 to 2005, NASQAN will study the water quality of the Yukon River. Located in Canada and Alaska, the Yukon River drains approximately 330,000 square miles and is the fourth largest watershed in North America. As part of this water quality study, a number of Geographical Information System (GIS) data sets are being created.

Purpose: The purpose of the GIS datasets of the Yukon River Basin is to provide scientists working on the Yukon River study the information needed to do basic spatial analysis.This GIS coverage is one of 16 coverages created for the Yukon study.

Supplemental: Procedures_Used The coverage of precipitation regions for the Yukon River Basin was created by using a coverage of precipitation developed by Jones and Fahl (1994). This precipitation coverage includes both Alaska and northwest Canada. Using the watershed boundary of the Yukon River Basin, the precipitation regions for the Yukon River Basin were clipped from the Jones and Fahl coverage. The coverage was then projected into an Albers Equal Area projection with the following parameters: Projection ALBERS Units METERS Datum NAD27 Parameters: 1st standard parallel 55 00 00 2nd standard parallel 65 00 00 Central meridian -154 00 00 latitude of projection's origin 50 00 00 false easting (meters) 0.0000 false northing (meters) 0.0000 Other_References_Cited: Jones, S.H., and Fahl, C.B., 1994, Magnitude and frequency of floods in Alaska and conterminous basins of Canada: U.S. Geological Survey Water-Resources Investigations Report 93-4179, 122 p. + 2 pl.

Publication Date: 20020522

Originator: Dan Long, Tim Brabets

Online citation: \\KODIAK\I$\ProjectData\USFWS_CGL\CGL_LG_Data.mdb

Bounding coordinates:
West: -168.091674
East: -129.177327
North: 69.077973
South: 58.626998

Place Keywords: Yukon River Basin, Alaska, Canada

Theme Keywords: Basin Boundary, NASQAN, Yukon River, Precipitation

Geographic: GCS_North_American_1983

Attributes of: Precipitation_Regions

Metadata date: 20090722