| 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 |
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| 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 |
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| Breaker (SIR 2015-5031) | Slope1085 |
| CSL1085RAW | Main channel slope computed by the 10 and 85 method, unadjusted for bias |
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| CSLBlue | Change in elevation of the longest blue-line stream (not extended to the boundary) divided by stream length |
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| Wagner (SIR 2016-5081) | SLPFM |
| DRNAREA | Area that drains to a point on a stream |
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| 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. |
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| LC11DEV | Percentage of developed (urban) land from NLCD 2011 classes 21-24 | percentage |
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| 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. |
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| 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 | http://datadiscoverystudio.org/geoportal/rest/metadata/item/b8da60799b4e479b996366e4c470ab64/html
| 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. |
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| 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 |
