General Information

Project area general description

The state of South Carolina

Are any areas excluded?

Equations do not apply in tidal reaches and areas of regulation

Types of flow statistics available

peak flows (rural and urban/small rural)

ArcGIS version used for processing

10.3.2

Was TopoGrid used to process DEMs?

No

DEM and derivatives projection (general description)

South Carolina State Plane (NAD 83) International Feet

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

30 feet

DEM source

South Carolina Department of Natural Resources Statewide LiDAR Project

Hydrography source

South Carolina Department of Natural Resources Statewide LiDAR Project

Hydrologic unit "walls" source

South Carolina Department of Natural Resources Statewide LiDAR Project

Gage basin boundaries source

not used

Interactive map snapping tolerance

3 cells

 

Basin Characteristics Methods and Sources

Name

Description

Computation method

Data source

Report/Details

Variable label in report

DRNAREA

Drainage area in square miles

polygon area

Derived from Flow Direction Grid

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

DA

 

 

 

 

PCTREG1

Percent of area covered by hydrologic region 1

Percent of area

Derived from region grid

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

PCT1

 

 

 

 

PCTREG2

Percent of area covered by hydrologic region 2

Percent of area

Derived from region grid

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

PCT2

 

 

 

 

PCTREG3

Percent of area covered by hydrologic region 3

Percent of area

Derived from region grid

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

PCT3

 

 

 

 

PCTREG4

Percent of area covered by hydrologic region 4

Percent of area

Derived from region grid

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

PCT4

 

 

 

 

PCTREG5

Percent of area covered by hydrologic region 5

Percent of area

Derived from region grid

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

PCT5







BSLDEM30FT 

Mean basin slope, based on slope percent grid

 Computed

 Derived from slope grid







CSL10_85fm
Change in elevation between points 10 and 85 percent of length along main channel to basin divide divided by length between points ft per mi
Computed
Derived from longest flow path and DEM








ELEV
Average basin elevation, in feet
Computed
Derived from DEM








ELEVMAX
Maximum basin elevation, in feet
Computed
Derived from DEM








I24H2Y
Maximum 24-hour precipitation that occurs on average once in 2 years
Area-weighted average
NOAA Atlas 14, vols. 2 & 9








I24H10Y
Maximum 24-hour precipitation that occurs on average once in 10 years
Area-weighted average
NOAA Atlas 14, vols. 2 & 9








I24H50Y
Maximum 24-hour precipitation that occurs on average once in 50 years
Area-weighted average
NOAA Atlas 14, vols. 2 & 9
Feaster, Gotvald, and Weaver, 2014
I24H50Y






I24H100Y
Maximum 24-hour precipitation that occurs on average once in 100 years
Area-weighted average
NOAA Atlas 14, vols. 2 & 9








LC01DEV
Percentage of land-use from NLCD 2001 classes 21-24
Percent of area
MRLC National Land Cover Dataset 2001








LC01FOREST
Percentage of forest from NLCD 2001 classes 41-43
Percent of area
MRLC National Land Cover Dataset 2001








LC01IMP
Percent imperviousness of basin area 2001 NLCD
Area-weighted average
MRLC National Land Cover Dataset 2001








LC06DEV
Percentage of land-use from NLCD 2006 classes 21-24
Percent of area
MRLC National Land Cover Dataset 2006
Feaster, Gotvald, and Weaver, 2014
DEVNLCD06






LC06FOREST
Percentage of forest from NLCD 2006 classes 41-43
Percent of area
MRLC National Land Cover Dataset 2006








LC06IMP
Percentage of impervious area determined from NLCD 2006 impervious dataset
Area-weighted average
MRLC National Land Cover Dataset 2006
Feaster, Gotvald, and Weaver, 2014
IMPNLCD06






LFPLENGTH
Length of longest flow path
Computed
Derived from flow direction grid








MINBELEV
Minimum basin elevation
Computed
Derived from DEM








PRECIP
Mean Annual Precipitation
Area-weighted average
PRISM 1981-2010








SSURGOA
Percentage of area of Hydrologic Soil Type A from SSURGO
Percent of area
SSURGO








SSURGOB
Percentage of area of Hydrologic Soil Type B from SSURGO
Percent of area
SSURGO








SSURGOC
Percentage of area of Hydrologic Soil Type C from SSURGO
Percent of area
SSURGO








SSURGOD
Percentage of area of Hydrologic Soil Type D from SSURGO
Percent of area
SSURGO








STORAGE
Percentage of area of storage (lakes ponds reservoirs wetlands)
Percent of area
MRLC National Land Cover Dataset 2011


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