Modified on: Tue, 17 Oct, 2017 at 10:39 AM
General Information
Project area general description
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The state of Montana, the portion of Wyoming in the Yellowstone and Little Missouri River Basins
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Are any areas excluded?
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Portions of the mainstem Milk, Missouri, and Yellowstone Rivers; and the Belle Fourche Basin in the extreme southeast corner of Montana
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Types of flow statistics available
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Peak flows statewide, and low flow frequencies; mean annual and mean monthly streamflows; and the 20-, 50-, and 80-percent durations for monthly and annual streamflows in Western Montana
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ArcGIS version used for processing
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10.2.2
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Was TopoGrid used to process DEMs?
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No
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DEM and derivatives projection (general description)
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NAD83 Albers
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DEM and derivatives (fdr, fac, etc.) resolution
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30 m
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DEM source
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NED
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Hydrography source
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NHDPlus Version 2
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Hydrologic unit “walls” source
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WBD
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Gage basin boundaries source
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Not used
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Interactive map snapping tolerance
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3 cells
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Basin characteristics computed using continuous parameter grids (CPGs)
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BSLDEM30M, ELEV, EL5000, EL6000, LC01CRPHAY, LC01FOREST, IRRIGAT_MT, LAKESNHDH, NFSL30_30M, PRECIP, SLOP30_30M, SLOP50_30M, ET0306MOD, ET0710MOD, LC01DEV, LC01WETLND
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Basin Characteristics Methods and Sources
Name
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Description
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Computation method
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Data source
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Report
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Variable in report
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CONTDA
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Contributing Drainage Area
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Basin area
|
30M DEM and 30M flow direction grid
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SIR 2015-5019-F, G
|
A
|
ELEV
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Mean basin elevation, in feet
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Area-weighted mean
|
30M DEM
|
SIR 2015-5019-F, G
|
E
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TEMP
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Mean annual temperature, in degrees Fahrenheit
|
Area-weighted mean
|
PRISM (United States) and Long Term Mean Climate Grids, 1971-2000 (Canada)
|
SIR 2015-5019-G
|
--
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ELEVMAX
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Maximum elevation in feet
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Basin max elevation
|
30M DEM
|
SIR 2015-5019-F, G
|
--
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MINBELEV
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Minimum elevation in feet
|
Basin min elevation
|
30M DEM
|
SIR 2015-5019-F, G
|
--
|
RELIEF
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Maximum – minimum elevation, in feet
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Computed
|
30M DEM
|
SIR 2015-5019-F, G
|
--
|
EL5000
|
Percent of basin above 5,000 feet elevation
|
Basin percent
|
30M DEM
|
SIR 2015-5019-F, G
|
E5000
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EL6000
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Percent of basin above 6,000 feet elevation
|
Basin percent
|
30M DEM
|
SIR 2015-5019-F, G
|
E6000
|
IRRIGAT_MT
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Percent of basin under some irrigation regime
|
Basin percent
|
Final Land Unit (FLU) classification, Montana Department of Revenue (2014)
|
SIR 2015-5019-G
|
--
|
LAKESNHDH
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Percent of basin covered in lakes, ponds, and reservoirs
|
Basin percent
|
NHD high resolution waterbodies
|
SIR 2015-5019-F, G
|
--
|
LC01CRPHAY
|
Percent of basin covered by agriculture
|
Basin percent
|
NLCD2001 and LCC2000
|
SIR 2015-5019-G
|
--
|
LC01DEV
|
Percent of basin covered by urban land
|
Basin percent
|
NLCD2001 and LCC2000
|
SIR 2015-5019-G
|
--
|
LC01WETLND
|
Percent of basin covered by wetlands
|
Basin percent
|
NLCD2001 and LCC2000
|
SIR 2015-5019-F, G
|
--
|
BSLDEM30M
|
Mean basin slope, in percent
|
Basin slope
|
30M DEM
|
SIR 2015-5019-F, G
|
--
|
SLOP30_30M
|
Percent of basin with slopes greater than or equal to 30 percent
|
Basin percent
|
30M DEM
|
SIR 2015-5019-F, G
|
SLP30
|
NFSL30_30M
|
Percent of basin with north-facing slopes greater than or equal to 30 percent
|
Basin percent
|
30M DEM
|
SIR 2015-5019-G
|
--
|
SLOP50_30M
|
Percent of basin with slopes greater than or equal to 50 percent
|
Basin percent
|
30M DEM
|
SIR 2015-5019-F, G
|
SLP50
|
PRECIP
|
Mean annual precipitation, in inches
|
Area-weighted mean
|
PRISM (United States) and Long Term Mean Climate Grids, 1971-2000 (Canada)
|
SIR 2015-5019-F, G
|
P
|
LC01FOREST
|
Percent of basin covered by forest
|
Basin percent
|
NLCD2001 and LCC2000
|
SIR 2015-5019-F, G
|
F
|
ET0306MOD
|
Average spring (March-June) mean monthly evapotranspiration (2000-2012) in inches
|
Area-weighted mean
|
MODIS global evapotranspiration product (MOD16)
|
SIR 2015-5019-F, G
|
ETSPR
|
ET0710MOD
|
Average summer (July - October) mean monthly evapotranspiration (2000-2012) in inches
|
Area-weighted mean
|
MODIS global evapotranspiration product (MOD16)
|
SIR 2015-5019-F, G
|
--
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