Project area general description

The state of Georgia

Are any areas excluded?

All areas outside the state of Georgia, coastal areas and the Okefenokee Swamp

Types of flow statistics available

Peak flows

ArcGIS version used for processing

9.3.1

Was TopoGrid used to process DEMs?

No

DEM and derivatives projection (general description)

NAD 1983 Albers

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

 10 m

DEM source

NED 2004

Hydrography source

High-resolution NHD  1:24,000-scale

Hydrologic unit "walls" source

WBD

Gage basin boundaries source

not used

Interactive map snapping tolerance

3 cells

Name

Description

Computation method

Data source

Report

Variable label in report

DRNAREA

Drainage area in square miles

Basin area

10m DEM and 10m Flow direction grid

Gotvald, A.J., Feaster, T.D., and Weaver, J.C., 2009

Drainage area (mi2)

LC06FOREST

Percent of area covered by forest using 2006 NLCD

Basin average

http://www.mrlc.gov/nlcd06_data.php

LC06AGRI

Percent of area covered by agriculture using 2006 NLCD

Basin average

http://www.mrlc.gov/nlcd06_data.php

LC06DEV

Percent of area covered by developed areas using 2006 NLCD

Basin average

http://www.mrlc.gov/nlcd06_data.php

LC06IMP

Percent of area covered by impervious surface 2006 NLCD

Basin average

http://www.mrlc.gov/nlcd06_data.php

ELEV

Average basin elevation from 10-m DEM, in feet

Basin average, using DEM

Computed from DEM

CSL10_85FM

10-85 slope in feet per mile based on longest flow path and DEM

Computed Stream Slope

Computed using StreamSlope ArcHydro tool

BSLDEM10M

Channel 10-85 slope in feet per mile

Computed Basin Slope

Computed using BasinSlope ArcHydro tool

PRECIP

Mean annual precipitation in inches

Basin average

NOAA Atlas 14 Precipitation Frequency Estimates

http://hdsc.nws.noaa.gov/hdsc/pfds/pfds_gis.html

I24H10Y

Precipitation intensity 24-hour 10-year

Basin average

NOAA Atlas 14 Precipitation Frequency Estimates

http://hdsc.nws.noaa.gov/hdsc/pfds/pfds_gis.html

I24H25Y

Precipitation intensity 24-hour 25-year

Basin average

NOAA Atlas 14 Precipitation Frequency Estimates

http://hdsc.nws.noaa.gov/hdsc/pfds/pfds_gis.html

I24H50Y

Precipitation intensity 24-hour 50-year

Basin average

NOAA Atlas 14 Precipitation Frequency Estimates

http://hdsc.nws.noaa.gov/hdsc/pfds/pfds_gis.html

I24H100Y

Precipitation intensity 24-hour 100-year

Basin average

NOAA Atlas 14 Precipitation Frequency Estimates

http://hdsc.nws.noaa.gov/hdsc/pfds/pfds_gis.html

PCTREG1

Percent of area covered by hydrologic region 1

Basin percent

Region boundary used in report

Gotvald, A.J., Feaster, T.D., and Weaver, J.C., 2009

Hydrologic region 1

PCTREG2

Percent of area covered by hydrologic region 2

Basin percent

Region boundary used in report

Gotvald, A.J., Feaster, T.D., and Weaver, J.C., 2009

Hydrologic region 2

PCTREG3

Percent of area covered by hydrologic region 3

Basin percent

Region boundary used in report

Gotvald, A.J., Feaster, T.D., and Weaver, J.C., 2009

Hydrologic region 3

PCTREG4

Percent of area covered by hydrologic region 4

Basin percent

Region boundary used in report

Gotvald, A.J., Feaster, T.D., and Weaver, J.C., 2009

Hydrologic region 4

PCTREG5

Percent of area covered by hydrologic region 5

Basin percent

Region boundary used in report

Gotvald, A.J., Feaster, T.D., and Weaver, J.C., 2009

Hydrologic region 5