General Information

Project area general description
The state of Arkansas
Are any areas excluded?
Harmonic Mean Flows are not computed in the Mississippi Embayment
Types of flow statistics available
Peak flows, harmonic mean flow, and dry season mean monthly flows
ArcGIS version used for processing
10.3
Was TopoGrid used to process DEMs?
Used same DEM as StreamStats
DEM and derivatives projection (general description)
NAD83_Albers (same as StreamStats)
DEM and derivatives (fdr, fac, etc.) resolution
Same as StreamStats
DEM source
Same as StreamStats
Hydrography source
Same as StreamStats
Hydrologic unit "walls" source
Same as StreamStats
Gage basin boundaries source
Same as StreamStats
Interactive map snapping tolerance
Same as StreamStats
Basin characteristics computed using continuous parameter grids (CPGs)
LC11DVOPN, LC11PAST, ALVM, UPZ, BFI, DRYTOTRUN, PRECIPPRIS00, SOILINDEX

Basin Characteristics Methods and Sources

Name Description Computation method Data source Report Variable label in report
ALVM Percent of drainage area with surficial geology as Quaternary alluvium deposits from Reed and Bush, 2005 mean Reed and Bush, 2005 Wagner (SIR 2016-5081) ALVM
BFI Base flow index at outlet value extracted from grid Falcone and others, 2010 Breaker (SIR 2015-5031) BFI
BSHAPELFP Basin shape factor, defined as longest flow path length squared, divided by drainage area (LFPLENGTH^2)/DRNAREA
Wagner (SIR 2016-5081) BSHAPE
CSL1085ADJ Main channel slope computed by the 10 and 85 method, adjusted for bias EQUATION=1.2072*CSL1085RAW^0.9597


CSL1085LFP Change in elevation divided by length between points 10 and 85 percent of distance along the longest flow path to the basin divide, LFP from 2D grid

Breaker (SIR 2015-5031) Slope1085
CSL1085RAW Main channel slope computed by the 10 and 85 method, unadjusted for bias



CSLBlue Change in elevation of the longest blue-line stream (not extended to the boundary) divided by stream length

Wagner (SIR 2016-5081) SLPFM
DRNAREA Area that drains to a point on a stream

Funkhouser (SIR 2008-5065) A
Wagner (SIR 2016-5081) DRNAREA
Breaker (SIR 2015-5031) DRNAREA
ELEV Mean Basin Elevation mean
Wagner (SIR 2016-5081) ELEV
HIGHREG NSS region in which the delineation point resides. Used in implementation of Wagner's equations (1715, 1716, 1717, 1718, 1719).  value extracted from grid named peakflows. HIGHREG used in NSS Regions table.


LC11DEV Percentage of developed (urban) land from NLCD 2011 classes 21-24 percentage


LC11DVOPN Percent of drainage area as land use code 21 (developed open area) from NLCD 2011 data set mean Homer, C.G., Dewitz, J.A., Yang, L., Jin, S., Danielson, P., Xian, G., Coulston, J., Herold, N.D., Wickham, J.D., and Megown, K., 2015, Completion of the 2011 National Land Cover Database for the conterminous United States-Representing a decade of land cover change information. Photogrammetric Engineering and Remote Sensing, v. 81, no. 5, p. 345-354  Wagner (SIR 2016-5081) LC11DVOPN
LC11IMP Average percentage of impervious area determined from NLCD 2011 impervious dataset mean Xian, G., Homer, C., Dewitz, J., Fry, J., Hossain, N., and Wickham, J., 2011. The change of impervious surface area between 2001 and 2006 in the conterminous United States. Photogrammetric Engineering and Remote Sensing, Vol. 77(8): 758-762.  Wagner (SIR 2016-5081) LC11IMP
LC11PAST Percent of drainage area as land use code 81 (pasture) from NLCD 2011 data set mean Homer, C.G., Dewitz, J.A., Yang, L., Jin, S., Danielson, P., Xian, G., Coulston, J., Herold, N.D., Wickham, J.D., and Megown, K., 2015, Completion of the 2011 National Land Cover Database for the conterminous United States-Representing a decade of land cover change information. Photogrammetric Engineering and Remote Sensing, v. 81, no. 5, p. 345-354  Wagner (SIR 2016-5081) LC11PAST
LFPLENGTH Length of longest flow path sum
Wagner (SIR 2016-5081) LFPLENGTH
LOWREG NSS region in which the delineation point resides. Used in implementation of Funkhouser's SIR 2008-5065 equations (1438, 1439, 1440). value extracted from grid named lf_regions2. LOWREG used in NSS Regions table.


MARAVPRE Mean March precipitation mean monthly
Funkhouser (SIR2008-5065) P(Mar) 61-90
NOVAVPRE Mean November precipitation mean monthly
Funkhouser (SIR2008-5065) P(Nov) 61-90
ORDOMISS Percent Surficial Geology as Ordovician and Mississippian Rocks percentage
Funkhouser (SIR2008-5065) ORDO/MISS K
Breaker (SIR 2015-5031) ORDOMISS
PRECIP  Basin mean annual precipitation for 1971-2000 from PRISM mean annual PRISM Climate Group, PRISM climate data: Corvallis, Oregon, Oregon State University, accessed January 26, 2013, at http://prism.oregonstate.edu. Funkhouser (SIR2008-5065) P(Annual) 71-00
Wagner (SIR 2016-5081) PRECIP
PREMARAPR Precipitation March-April basin averaged 1961-1990, mean seasonal as defined in SIR 2008-5065 mean seasonal PRISM Climate Group, PRISM climate data: Corvallis, Oregon, Oregon State University,  http://prism.oregonstate.edu. Funkhouser (SIR2008-5065) P(Mar-Apr) 61-90
PRENOVDEC Precipitation November-December basin averaged 1961-1990, mean seasonal as defined in SIR 2008-5065 mean seasonal PRISM Climate Group, PRISM climate data: Corvallis, Oregon, Oregon State University,  http://prism.oregonstate.edu. Funkhouser (SIR2008-5065) P(Nov-Dec) 61-90
PRNOVAPR00 Precipitation November-April basin average, mean seasonal from PRISM 1971-2000 mean seasonal PRISM Climate Group, PRISM climate data: Corvallis, Oregon, Oregon State University,  http://prism.oregonstate.edu. Funkhouser (SIR2008-5065) P(NOV-APR)71-00
PRNOVAPR90 Precipitation November-April basin average, mean seasonal from PRISM 1961-1990 mean seasonal PRISM Climate Group, PRISM climate data: Corvallis, Oregon, Oregon State University,  http://prism.oregonstate.edu. Funkhouser (SIR2008-5065) P(NOV-APR)61-90
PZNSSREGNO NSS region in which the delineation point resides. Used in implementation of Funkhouser's SIR 2008-5065 equations (1445, 1446, 1447). value extracted from grid named pzf_regions3. PZNSSREGNO used in NSS Regions table.


SOILINDEX Mean STATSGO Hydrologic Soils Index (from PL. 2 WRIR 03-4107 for WY) mean Funkhouser, Eng, and Moix, 2008 (SIR2008-5065); Funkhouser (SIR2008-5065) SOILHYDRO
Schwartz and Alexander, 1995 (USGS Open-File Report 95-449) Wagner (SIR 2016-5081) SOILINDEX
TAU_ANN_G Tau, Average annual base-flow recession time constant as defined in SIR 2008-5065, estimated from a grid mean annual
Funkhouser (SIR2008-5065) TAU ANNUAL
TAU_SPR_G Tau, Average base-flow recession time constant for March through April as defined in SIR 2008-5065, estimated from a grid mean seasonal
Funkhouser (SIR2008-5065) TAU MAR-APR
TAU_WIN_G Tau, Average base-flow recession time constant for November through December as defined in SIR 2008-5065, estimated from a grid mean seasonal
Funkhouser (SIR2008-5065) TAU NOV-DEC
TRUN0711 Mean annual dry season total runoff, July through November mean annual Pugh and Westerman, 2014 Breaker (SIR 2015-5031) DryTotRun
UPZ Percent of drainage area with surficial geology as upper Paleozoic units from Reed and Bush, 2005 percentage Reed and Bush, 2005 Wagner (SIR 2016-5081) UPZ