RELATIVE EFFECTIVE PRECIPITATION GLACIER COUNTY

Legend Relative Effective Precipitation Glacier County

Kintla Creek Centimeters TOOLE ?@17 High : 334

Milk River Mean : 74

Bowman Creek North Fork Milk River

Low : 17 Belly River

Waterton River

Middle Fork Milk River

Quartz Creek Little Rock Coulee Big Rock Coulee

Swiftcurrent Creek

Dry Fork Milk River

Logging Creek

Relative Effective Annual Precipitation (REAP):

Saint Mary River REAP values were developed for each county by the Natural Resources Conservation Service (NRCS) using a process that included: Rocky Springs Coulee 1) Adjusting the DAYMET precipitation data using available TAPS and other precipitation station data South Fork Milk River to accommodate the official 30 year data set used by NRCS. DAYMET is based on a more recent 18 year timeframe. Sand Coulee 2) Re-sampling the adjusted and verified 1 km DAYMET to the 10 or 30 meter DEMs. 3) Sensitizing the adjusted data to the landscape to represent relative effective precipitation. Depending upon the geographic location within Montana and varying with degree of slope, actual precipitation for southerly aspects may be adjusted downward and northerly aspects may be adjusted upward, also varying on degree of slope. Neutral aspects (all slopes less than 15 percent as well as neutral compass points regardless of slope) were not adjusted up or down. GLACIER 4) Calibration and refinement of the REAP data using the expert knowledge of field soil scientists and ¤£89 results from mining the SSURGO soils dataset for elevations associated with the cryic/frigid soil temperature regimes within a county.

Cut Bank Creek DAYMET is a model that generates daily surfaces of temperature, precipitation, humidity, and radiation over large regions of complex terrain. DAYMET was developed at the University of Montana, Numerical Terradynamic Simulation Group (NTSG). Camas Creek TAPS - Temperature and Precipitation Summary tables developed by the NWCC (National Water and Cut Bank Climate Center) !O

North Fork ¤£2 Map Scale

Spring Creek Spring Coulee 1:220,000

Browning 0 2 41 South Fork Cut Bank Creek !. Willow Creek

¤£2 Miles Nyack Creek

West DISCLAIMER: North Fork Flathead River North Fork Flathead River Glacier ?@49 This map is to be used as a primary reference source and is not intended for use in site-specific planning. This is public information and may be interpreted by organizations, agencies, units of government , or others, based on needs; however, they are responsible for the appropriate application. Federal, State, or local regulatory bodies are not to reassign to the Natural Resources Conservation Service East any authority for the decisions they make. Middle Fork Flathead River Glacier Park

Flathead River Two Medicine River Location within Montana

Havre !P ¤£89 FLATHEAD Badger Creek South Fork Two Medicine River Missoula !P Miles Helena !P City Whitetail Creek !O

Bozeman Billings South Fork Flathead River Ole Creek Birch Creek !P !P Valier ?@44 Heart Butte PONDERA ¤£2

North Fork Whitetail Creek

South Fork Whitetail Creek

South Badger Creek Dry Fork Marias River

?@ 35 North Fork Birch Creek Middle Fork Dry Fork Marias River NRIS Map Number 08NRIS0034REAP_V2, ANSI-D April 2008