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StreamStats

Oregon StreamStats Application Information


General Information

Project area general description

The state of Oregon

Are any areas excluded?

The Columbia, Snake, and Owyhee River mainstems, as well as three small areas in SubRegion 1604 in Southeast Oregon, are excluded.

Types of flow statistics available

Low flows statewide, peak flows Western Oregon only

ArcGIS version used for processing

Originally 9.1, with some updates using 9.2 and 9.3

Was TopoGrid used to process DEMs?

No.

DEM and derivatives projection (general description)

Albers Equal Area for conterminous US, horizontal datum NAD 83, vertical datum NAVD 88; same as NHDPlus Version 1. See http://www.horizon-systems.com/NHDPlus/NHDPlusV1_documentation.php for details.

DEM and derivatives (fdr, fac, etc.) resolution

30 meters

DEM source

NHDPlus V1 (NED 2004) http://www.horizon-systems.com/NHDPlus/NHDPlusV1_data.php

Hydrography source

NHDPlus V1 (1:100,000 NHD snapshot) http://www.horizon-systems.com/NHDPlus/NHDPlusV1_data.php

Hydrologic unit "walls" source

not used

Gage basin boundaries source

not used

Interactive map snapping tolerance

3 cells

Basin characteristics computed using continuous parameter grids (CPGs)

BSLOPD, FOREST, IMPERV, I24H2Y, JANMAX, JANMAXTMP, JANMIN, JANMINTMP, MAXTEMP, MINTEMP, OR_HIPERMA, OR_HIPERMG, PRECIP, SOILPERM, WATCAP

 

Basin Characteristics Methods and Sources

Name

Description

Computation method

Data source

Report

Variable label in report

BSLOPD

Mean basin slope measured in degrees.

area-weighted mean

slope of 30-m DEM, computed from NHDPlus elev_cm grid

Risley and others (2008)

S

http://www.horizon-systems.com/NHDPlus/

 

 

 

 

Cooper (2005)

Slope

DRNAREA

Drainage area in square miles

polygon area

GlobalWatershed

Risley and others (2008)

DA

 

 

 

 

Cooper (2005)

Area

DRNDENSITY

Total length of streams divided by total drainage area, kilometers per square kilometer

STRMTOT / DRNAREA

Computed with appropriate units conversions.

Risley and others (2008)

DD

 

 

 

 

Cooper (2005)

not used

ELEV

Mean Basin Elevation, in feet

area-weighted mean

30-m DEM, NHDPlus elev_cm grid

Risley and others (2008)

E

http://www.horizon-systems.com/NHDPlus/

 

 

 

 

Cooper (2005)

Elev

ELEVMAX

Maximum elevation in feet.

maximum

30-m DEM, NHDPlus elev_cm grid

Risley and others (2008)

XE

http://www.horizon-systems.com/NHDPlus/

 

 

 

 

Cooper (2005)

not used

MINBELEV

Minimum elevation in feet.

minimum

30-m DEM, NHDPlus elev_cm grid

Risley and others (2008)

NE

http://www.horizon-systems.com/NHDPlus/

 

 

 

 

Cooper (2005)

not used

FOREST

Percentage of area covered by forest.

percent of area

Estimated using ArcInfo Grid with 30-meter resolution data layers from the USGS National Land Cover Dataset (1992); forest categories included: deciduous, evergreen, and mixed. Source: http://landcover.usgs.gov/natllandcover.php, accessed June 25, 2008.

Risley and others (2008)

F

 

 

 

 

Cooper (2005)

not used

I24H2Y

Maximum 24-hour precipitation that occurs on average once in 2 years - equivalent to precipitation intensity index, in inches

area-weighted mean

Oregon Climate Service, Oregon State University

Risley and others (2008)

not used

http://www.ocs.orst.edu/

 

 

 

 

Cooper (2005)

I24-2

IMPERV

Percentage of area covered by impervious surfaces

percent of area

NOAA 1 km Sprawl impervious surfaces grid

Risley and others (2008)

I

http://www.ngdc.noaa.gov/dmsp/download_sprawl.html

 

 

 

 

Cooper (2005)

not used

JANMAXT2K

Mean Maximum January Temperature, in degrees Fahrenheit

area-weighted mean

2KM resolution PRISM, 30-year average daily, Maximum January

Risley and others (2008)

not used

Temperature (1961-1990) http://www.climatesource.com/

 

 

 

 

Cooper (2005)

Mx Jan T

JANMAXTMP

Mean January maximum air temperature, in Fahrenheit.

area-weighted mean

800M resolution PRISM 1971-2000 data

Risley and others (2008)

JXT

http://www.prism.oregonstate.edu/products/

 

 

 

 

Cooper (2005)

not used

JANMINT2K

Mean Minimum January Temperature, in degrees Fahrenheit

area-weighted mean

2KM resolution PRISM, 30-year average daily, Minimum January

Risley and others (2008)

not used

Temperature (1961-1990) http://www.climatesource.com/

 

 

 

 

Cooper (2005)

Mn Jan T

JANMINTMP

Mean January minimum air temperature, in degrees Fahrenheit.

area-weighted mean

800M resolution PRISM 1971-2000 data

Risley and others (2008)

JNT

http://www.prism.oregonstate.edu/products/

 

 

 

 

Cooper (2005)

not used

LC11IMP

Percentage of impervious area determined from NLCD 2011 impervious dataset.

percent of area

30M resolution NLCD 2011 data

Risley and others (2008)

not used

http://www.mrlc.gov/nlcd11_data.php

not used

 

 

Cooper (2005)

not used

LC11BARE

Percentage of barren from NLCD 2011 class 31.

percent of area

30M resolution NLCD 2011 data

Risley and others (2008)

not used

http://www.mrlc.gov/nlcd11_data.php

not used

 

 

Cooper (2005)

not used

LC11CRPHAY

Percentage of cultivated crops and hay, classes 81 and 82, from NLCD 2011.

percent of area

30M resolution NLCD 2011 data

Risley and others (2008)

not used

http://www.mrlc.gov/nlcd11_data.php

not used

 

 

Cooper (2005)

not used

LC11DEVHI

Percentage of area developed, high intensity, NLCD 2011 class 24.

percent of area

30M resolution NLCD 2011 data

Risley and others (2008)

not used

http://www.mrlc.gov/nlcd11_data.php

not used

 

 

Cooper (2005)

not used

LC11DVLO

Percentage of developed area, low intensity, from NLCD 2011 class 22.

percent of area

30M resolution NLCD 2011 data

Risley and others (2008)

not used

http://www.mrlc.gov/nlcd11_data.php

not used

 

 

Cooper (2005)

not used

LC11DVMD

Percentage of area developed, medium intensity, NLCD 2011 class 23.

percent of area

30M resolution NLCD 2011 data

Risley and others (2008)

not used

http://www.mrlc.gov/nlcd11_data.php

not used

 

 

Cooper (2005)

not used

LC11DVOPN

Percentage of developed open area from NLCD 2011 class 21.

percent of area

30M resolution NLCD 2011 data

Risley and others (2008)

not used

http://www.mrlc.gov/nlcd11_data.php

not used

 

 

Cooper (2005)

not used

LC11FORSHB

Percentage of forests and shrub lands, classes 41 to 52, from NLCD 2011.

percent of area

30M resolution NLCD 2011 data

Risley and others (2008)

not used

http://www.mrlc.gov/nlcd11_data.php

not used

 

 

Cooper (2005)

not used

LC11HERB

Percentage of herbaceous from NLCD 2011 classes 71-74.

percent of area

30M resolution NLCD 2011 data

Risley and others (2008)

not used

http://www.mrlc.gov/nlcd11_data.php

not used

 

 

Cooper (2005)

not used

LC11WATER

Percent of open water, class 11, from NLCD 2011.

percent of area

30M resolution NLCD 2011 data

Risley and others (2008)

not used

http://www.mrlc.gov/nlcd11_data.php

not used

 

 

Cooper (2005)

not used

LC11WETLND

Percentage of wetlands, classes 90 and 95,  from NLCD 2011.

percent of area

30M resolution NLCD 2011 data

Risley and others (2008)

not used

http://www.mrlc.gov/nlcd11_data.php

not used

 

 

Cooper (2005)

not used

MAJ_ROADS

Length of non-state major roads in basin     

length

Oregon Department of Transportation

Risley and others (2008)

not used

 

not used

 

 

Cooper (2005)

not used

MAXBSLOPD

Maximum basin slope in degrees.

maximum

slope of 30-m DEM, computed from NHDPlus elev_cm grid

Risley and others (2008)

XS

http://www.horizon-systems.com/NHDPlus/

 

 

 

 

Cooper (2005)

not used

MAXTEMP

Mean annual maximum air temperature, Fahrenheit

area-weighted mean

800M resolution PRISM 1971-2000 data

Risley and others (2008)

AXT

http://www.prism.oregonstate.edu/products/

 

 

 

 

Cooper (2005)

not used

MINBSLOPD

Minimum basin slope in degrees.

minimum

slope of 30-m DEM, computed from NHDPlus elev_cm grid

Risley and others (2008)

NS

 

 

 

 

Cooper (2005)

not used

MIN_ROADS

Length of non-state minor roads in basin     

length

Oregon Department of Transportation

Risley and others (2008)

not used

 

not used

 

 

Cooper (2005)

not used

MINTEMP

Mean annual minimum air temperature, Fahrenheit

area-weighted mean

800M resolution PRISM 1971-2000 data

Risley and others (2008)

ANT

http://www.prism.oregonstate.edu/products/

 

 

 

 

Cooper (2005)

not used

OR_HIPERMA

Percent of area covered by high permeability aquifer units.

percent of area

Percent basin surface area containing high permeability aquifer units; units defined as Tertiary-Quaternary sedimentary deposits, granitic saprolite of the Klamath Mountains (McFarland, 1983) and basin-fill and alluvial aquifers (Gonthier, 1985); estimated using ArcInfo Grid with a data layer created from a 1:500,000 map.

Risley and others (2008)

A

 

 

 

 

Cooper (2005)

not used

OR_HIPERMG

Percent of area covered by high permeability geologic units.

percent of area

Percent basin surface area containing high permeability geologic units; units defined as Pliocene volcanic rocks, Upper Tertiary andesite, and Quaternary volcanic rocks; estimated using ArcInfo grid with a data layer created from a 1:2,500,000 map. Source: King and Beikman (1974), and http://pubs.usgs.gov/dds/dds11/

Risley and others (2008)

G

 

 

 

 

Cooper (2005)

not used

ORREG2

Region 2 indicator flag

grid value at outlet point

or_regions grid

Risley and others (2008)

not used

 

 

 

 

Cooper (2005)

not used

PRECIP

Mean annual basin precipitation, in inches.

area-weighted mean

800M resolution PRISM 1971-2000 data

Risley and others (2008)

P

http://www.prism.oregonstate.edu/products/

 

 

 

 

Cooper (2005)

not used

RELIEF

Relief in, feet.

maximum - minimum

30-m DEM, NHDPlus elev_cm grid

Risley and others (2008)

R

 

 

 

 

Cooper (2005)

Relief

SOILPERM

Average Soil Permeability, in inches per hour. As defined in SIR2005-5116.

area-weighted mean

http://www.soils.usda.gov/survey/geography/statsgo/

Risley and others (2008)

SP

 

 

 

 

Cooper (2005)

Soil P

STATE_HWY

Length of state highways in basin

length

Oregon Department of Transportation   

Risley and others (2008)

not used

 

 

 

 

Cooper (2005)

not used

STRMTOT

Total stream length in miles

length

100K National Hydrography Dataset in NHDPlus

Risley and others (2008)

not used

http://www.horizon-systems.com/NHDPlus/

 

 

 

 

Cooper (2005)

not used

WATCAPORC

Available water capacity weighted by depth of soil type and percent occupancy within the soil horizon, in inches per inch.

area-weighted mean

http://www.soils.usda.gov/survey/geography/statsgo/

Risley and others (2008)

not used

 

 

 

 

Cooper (2005)

Soil C

WATCAPORR

Available water capacity weighted by depth of soil type, in inches per inch.

area-weighted mean

http://www.soils.usda.gov/survey/geography/statsgo/

Risley and others (2008)

SC

 

 

 

 

Cooper (2005)

not used

The Oregon StreamStats introductory page here has additional information regarding the application, including links to reports, cooperators, and other explanatory information.