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StreamStats

Tennessee StreamStats Application Information


General Information

Project area general description

The state of Tennessee

Are any areas excluded?

MS River on the west, and Tenn River excluded.

Types of flow statistics available

peak flows

ArcGIS version used for processing

Originally 9.0

Was TopoGrid used to process DEMs?

No

DEM and derivatives projection (general description)

NAD 1983 TN StatePlane, FIPS Zone 4100 in feet

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

30 foot cells

DEM source

NED 2004

Hydrography source

High-resolution NHD 1:24,000-scale

Hydrologic unit "walls" source

Not used

Gage basin boundaries source

not used

Interactive map snapping tolerance

3 cells

 

Basin Characteristics Methods and Sources

Name

Description

Computation method

Data source

Report

Variable label in report

DRNAREA

Drainage area in square miles

Basin area

30ft DEM and 30ft Flow direction grid

Law, Tasker (2003)

DRNAREA

 

 

 

 

CSL10_85

Channel 10-85 slope in feet per mile

Computed Stream Slope

Computed using StreamSlope ArcHydro tool, required to compute Basin Length

Law, Tasker (2003)

CL

 

 

 

 

CONTDA

Contributing Drainage area in square miles

Basin area

Karst area subtracted from DRNAREA

Law, Tasker (2003)

CDA

 

 

 

 

SOILPERM

Average soil permeability - in/hr

Basin average

Schwartz, G.E., and Alexander, R.B., 1995, State Soil Geographic (STATSGO) database for the conterminous United States (ed. 1.1): U.S. Geological Survey Open-File Report 95-449, Arc 7.0 coverage.

 

 

 

TNSOILFAC

Percent area underlain by soil permeability of at least 2 in/hr

Percent of basin

U.S. Department of Agriculture, Natural Resources Conservation Service, 2006, Digital General Soil Map of U.S. (version 2), tabular digital data and vector digital data, accessed June 2007 at http://datagateway.nrcs.usda.gov

 

 

 

TNCLFACT2

Tennessee climate factor, 2-year interval

Value at basin outlet

Lichty, R.W., and Karlinger, M.R., 1990, Climate factor for small-basin flood frequency: Water Resources Bulletin, v. 26, no. 4, p. 577-586.

Law, Tasker (2003)

CF

 

 

 

 

RECCESS

Streamflow-recession index, in days per log cycle of decrease in discharge

Basin average

Bingham, R.H., 1986, Regionalization of low-flow characteristics of Tennessee Streams: U.S. Geological Survey Water-Resources Investigations Report 85-4191, 63 p.

 

 

 

 

HA1PCT HA4PCT

Percent of area within Hydrologic Areas 1 - 4

Percent of basin

Computed

Law, Tasker (2003)

HA

 

 

 

 

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