General Information

Project area general description
 The state of Arizona and Northern Mexico (Sonora)
Are any areas excluded?
 Colorado River excluded.
Types of flow statistics available
 peak flows and flow duration
ArcGIS version used for processing
 Originally 10.1, with some updates using 10.2 and 10.2.2
Was TopoGrid used to process DEMs?
 No
DEM and derivatives projection (general description)
 National Albers, NAD83 datum in feet
DEM and derivatives (fdr, fac, etc.) resolution
  10 meters
DEM source
 NED 2014
Hydrography source
 NHD 1:24,000-scale
Hydrologic unit "walls" source
 WBD boundaries
Gage basin boundaries source
 not used
Interactive map snapping tolerance
 3 cells

Basin Characteristics Methods and Sources

Name
 Description
 Computation method
 Data source
DRNAREA
 Drainage area in square miles
 polygon area
 Derived from Flow Direction Grid
ELEVMAX
 Maximum Basin Elevation in feet
 area-weighted max
 Derived from 10m DEM; U.S. Geological Survey, 1/3-arc-second National elevation dataset, 10/2009 version, for U.S. areas; 1-arc-second National elevation dataset, 10/2009 version, resampled to 10 meters, for Mexico areas: http://ned.usgs.gov/
MINBELEV
 Minimum Basin Elevation in feet
 area-weighted min
 Derived from 10m DEM
BSLDEM10M
 Average basin slope, in percent
 area-weighted average
 Derived from 10m DEM
MAXBSLOP
 Maximum Basin Slope in percent
 area-weighted max
 Derived from 10m DEM
MINBSLOP
 Minimum Basin Slope in percent
 area-weighted min
 Derived from 10m DEM
RELIEF
 Relief, in feet
 area-weighted average
 Derived from 10m DEM
RELRELF
 Relative relief - Basin relief divided by basin perimeter, in feet per mile
 area-weighted average
 Derived by RELIEF / BASINPERIM
ELEV
 Mean Basin Elevation in feet
 Area-weighted average
 Derived from 10m DEM
BASINPERIM
 Perimeter in miles
 computed
 Derived from basin polygon
DRNDENSITY
 Stream density (miles/square mile)
 computed
 Derived by STRMTOT / DRNAREA
SLOP30_10M
 Percent of area having slope greater than or equal to 30 percent, as measured from 10-m DEM
 computed
 Derived from slope and azimuth grids
OUTLETELEV
 Elevation at outlet in feet
 computed
 Derived from 10m DEM
EL5000
 High Elevation Index - Percent of area above 5000 feet
 area-weighted average
 Derived from 10m DEM
EL6000
 High Elevation Index - Percent of area above 6000 feet
 area-weighted average
 Derived from 10m DEM
EL7500
 High Elevation Index - Percent of area above 7500 feet
 area-weighted average
 Derived from 10m DEM
PRECIP
 Mean annual precipitation, in inches
 Area-weighted average
 Derived from PRISM for North America ; The monthly and annual precipitation grids were constructed from 800M resolution Parameter-elevation Regressions on Independent Slopes Model (PRISM) 1971-2000 data  (http://www.prism.oregonstate.edu/products/) for areas in the U.S., combined with data from the Canadian Forest Service (CFS) for areas in Mexico. The CFS datasets were similar to those described at http://cfs.nrcan.gc.ca/projects/3/2 for the 1971-2000 time period, but were processed at 30 arc-second (approximately 1 km) resolution for Canada, the United States, and northern Mexico. A bias correction factor was computed and applied to the CFS data to more closely match the PRISM data. The data were merged and PRISM data took precedence for areas in the U.S.
JANAVPRE
 January mean precipitation, in inches
 area-weighted average
 Derived from PRISM for North America
FEBAVPRE
 February mean precipitation, in inches
 area-weighted average
 Derived from PRISM for North America
MARAVPRE
 March mean precipitation, in inches
 area-weighted average
 Derived from PRISM for North America
APRAVPRE
 April mean precipitation, in inches
 area-weighted average
 Derived from PRISM for North America
MAYAVPRE
 May mean precipitation, in inches
 area-weighted average
 Derived from PRISM for North America
JUNAVPRE
 June mean precipitation, in inches
 area-weighted average
 Derived from PRISM for North America
JULAVPRE
 July mean precipitation, in inches
 area-weighted average
 Derived from PRISM for North America
AUGAVPRE
 August mean precipitation, in inches
 area-weighted average
 Derived from PRISM for North America
SEPAVPRE
 September mean precipitation, in inches
 area-weighted average
 Derived from PRISM for North America
OCTAVPRE
 October mean precipitation, in inches
 area-weighted average
 Derived from PRISM for North America
NOVAVPRE
 November mean precipitation, in inches
 area-weighted average
 Derived from PRISM for North America
DECAVPRE
 December mean precipitation, in inches
 area-weighted average
 Derived from PRISM for North America
I24H5Y
 24 Hour 5 Year Precipitation in inches
 Area-weighted average
 Derived from NOAA Atlas 14; Precip intensity grids note: For areas in the U.S. except for Colorado, NOAA Atlas 14, http://dipper.nws.noaa.gov/hdsc/pfds/ data were used. For the small areas in Mexico and Colorado, an ordinary least squares regression equation relating mean annual precipitation (explanatory variable) to precipitation intensity (response variable) was developed for streamgaging stations. The resulting regression model was applied to the mean annual precipitation grid using ArcGIS Modelbuilder to compute each precipitation intensity grid.
I24H10Y
 24 Hour 10 Year Precipitation in inches
 Area-weighted average
 Derived from NOAA Atlas 14
I24H25Y
 24 Hour 25 Year Precipitation in inches
 Percent of area
 Derived from NOAA Atlas 14
I24H50Y
 24 Hour 50 Year Precipitation in inches
 Percent of area
 Derived from NOAA Atlas 14
I24H100Y
 24 Hour 100 Year Precipitation in inches
 Percent of area
 Derived from NOAA Atlas 14
I24H200Y
 24 Hour 200 Year Precipitation in inches
 Percent of area
 Derived from NOAA Atlas 14
I24H500Y
 24 Hour 500 Year Precipitation in inches
 Percent of area
 Derived from NOAA Atlas 14
CH92_01FOR
 Percent difference between 1992 and 2001 area covered by forest
 Percent of area
 NLCD 1992 & 2001 cateogory 41-43 http://www.epa.gov/mrlc/nlcd-2001.html. Binational Land Cover 2001 dataset category 1, http://borderhealth.cr.usgs.gov/metadata/binat_lulc01_metadata.htm for Mexico areas
CH92_01DEV
 Percent difference between 1992 and 2001 area covered by developed land
 Percent of area
 NLCD 1992 & 2001 category 21-24 http://www.epa.gov/mrlc/nlcd-2001.html
STRMTOT
 Total stream length in miles
 Computed length
 Derived from NHD
LC01DEV
 Percent urban using NLCD 2001 classes 21-24
 Percent of area
 NLCD 2001 category 21-24 http://www.epa.gov/mrlc/nlcd-2001.html
LC92DEV
 Percent urban using NLCD 1992 classes 21-24
 Percent of area
 NLCD 2001 category 21-24 http://www.epa.gov/mrlc/nlcd-1992.html
TEMP
 Annual mean temperature, in degree F
 Area-weigted average
 The monthly and annual Fahrenheit grids were constructed from 800M resolution Parameter-elevation Regressions on Independent Slopes Model (PRISM) 1971-2000 data  (http://www.prism.oregonstate.edu/products/) for areas in the U.S., combined with data from the Canadian Forest Service (CFS) for areas in Mexico. The CFS datasets were similar to those described at http://cfs.nrcan.gc.ca/projects/3/2 for the 1971-2000 time period, but were processed at 30 arc-second (approximately 1 km) resolution for Canada, the United States, and northern Mexico. A bias correction factor was computed and applied to the CFS data to more closely match the PRISM data. The data were merged and PRISM data took precedence for areas in the U.S.
JANAVTMP
 January mean temperature, in degree F
 area-weighted average
 Derived from PRISM for North America
FEBAVTMP
 February  mean temperature, in degree F
 area-weighted average
 Derived from PRISM for North America
MARAVTMP
 March  mean temperature, in degree F
 area-weighted average
 Derived from PRISM for North America
APRAVTMP
 April  mean temperature, in degree F
 area-weighted average
 Derived from PRISM for North America
MAYAVTMP
 May  mean temperature, in degree F
 area-weighted average
 Derived from PRISM for North America
JUNAVTMP
 June  mean temperature, in degree F
 area-weighted average
 Derived from PRISM for North America
JULAVTMP
 July  mean temperature, in degree F
 area-weighted average
 Derived from PRISM for North America
AUGAVTMP
 August  mean temperature, in degree F
 area-weighted average
 Derived from PRISM for North America
SEPAVTMP
 September  mean temperature, in degree F
 area-weighted average
 Derived from PRISM for North America
OCTAVTMP
 October  mean temperature, in degree F
 area-weighted average
 Derived from PRISM for North America
NOVAVTMP
 November  mean temperature, in degree F
 area-weighted average
 Derived from PRISM for North America
DECAVTMP
 December  mean temperature, in degree F
 area-weighted average
 Derived from PRISM for North America
NFSL30_10M
 Percent north slope of 30% or greater using a 10m dem
 area-weighted average
 Derived from 10m DEM
IMPNLCD01
 Percent impervious using NLCD 2001
 area-weighted average
 NLCD 2001
LC01BARE
 Percent barren using NLCD 2001
 area-weighted average
 NLCD 2001 cateogory 31 http://www.epa.gov/mrlc/nlcd-2001.html
LC01FOREST
 Percent forest using NLCD 2001
 area-weighted average
 NLCD 2001 cateogory 41-43 http://www.epa.gov/mrlc/nlcd-2001.html
LC92FOREST
 Percent forest using NLCD 1992
 area-weighted average
 NLCD 2001 cateogory 41-43 http://www.epa.gov/mrlc/nlcd-1992.html
LC01HERB
 Percent HERB using NLCD 2001
 area-weighted average
 NLCD 2001 cateogory 71-74 http://www.epa.gov/mrlc/nlcd-2001.html
AZ_HIPERMA
 Percent basin surface area containing high permability aquifer units as defined in SIR2014-5211
 area-weighted average
 US high permeability aquifer Q, Qo, TSY, Qy, Pliocene Continenetal, MEX high permeability aquifer untis Cuaternario, conglomero, y suelo (Geology of the Conterminous United States at 1:2,500,000 Scale — A Digital Representation of the 1974 P.B. King and H.M. Beikman Map: http://pubs.usgs.gov/dds/dds11/index.html; Mexico Geological Data: http://www.inegi.org.mx/geo/contenidos/recnat/geologia/InfoEscala.aspx; Reynolds, S.J., 1988, Geologic Map of Arizona: Arizona Geological Survey Map 26, scale 1:1,000,000 rescaled to 1:500,000)
AZ_HIPERMG
 Percent basin surface area containing high permeability geoligc units as defined in SIR2014-5211
 area-weighted average
 US high permeability geology Quaternary volcanics, Pliocene volcanics, Mexico Higher permeability geology Cuaternarioa, Conglomerado (Geology of the Conterminous United States at 1:2,500,000 Scale — A Digital Representation of the 1974 P.B. King and H.M. Beikman Map: http://pubs.usgs.gov/dds/dds11/index.html; Mexico Geological Data: http://www.inegi.org.mx/geo/contenidos/recnat/geologia/InfoEscala.aspx; Reynolds, S.J., 1988, Geologic Map of Arizona: Arizona Geological Survey Map 26, scale 1:1,000,000 rescaled to 1:500,000)