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StreamStats

Illinois StreamStats Application Information


General Information

Project area general description

State of Illinois

Are any areas excluded?

MS River, OH River, IL River and Wabash River excluded.

Types of flow statistics available

peak flows

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)

NAD 1927 Albers in meters

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

10 m

DEM source

NED 2004

Hydrography source

Med-resolution NHD 1:100,000 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

10DEM and 10M flow direction grid

Soong, Ishii, Sharpe & Avery (2004)

TDA

 

 

 

 

CSL10_85

Adjusted Channel 10-85 slope in feet per mile

Computed Stream Slope

Computed using 1.0767*CSL1085RAW^0.9486

Soong, Ishii, Sharpe & Avery (2004)

MCS

 

 

 

 

CSL1085RAW

Unadjusted Channel 10-85 slope in feet per mile

Computed Stream Slope

Computed using Stream Slope ArcHydro tool

Soong, Ishii, Sharpe & Avery (2004)

MCS

 

 

 

 

BASLENAH

Adjusted basin length

Computed basin length

Computed using 1.0164*BASLENRAW+0.2364

Soong, Ishii, Sharpe & Avery (2004)

BL

 

 

 

 

BASLENRAW

Unadjusted basin length

Computed basin length

Computed using Bain Length ArcHydro tool

Soong, Ishii, Sharpe & Avery (2004)

BL

 

 

 

 

SOILPERM

Average soil permeability

Basin average

Computed

Soong, Ishii, Sharpe & Avery (2004)

PERMAVE

 

 

 

 

WATWET

Percent of area covered by open water using NLCD 2001

Percent of basin

NLCD 2001 water grid http://www.mrlc.gov/nlcd01_data.php

Soong, Ishii, Sharpe & Avery (2004)

%WATER

 

 

 

 

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