General Information

Project area general description

The state of Rhode Island

Are any areas excluded?

Block Island (Town of New Shoreham)

Types of flow statistics available

Low, medium, and high flow-durations statewide, low-flow frequency statewide, and peak flows statewide

ArcGIS version used for processing

Originally 9.1, with some updates using 9.2 and 9.3

Was TopoGrid used to process DEMs?

Yes

DEM and derivatives projection (general description)

Rhode Island State Plane meters

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

10 m

DEM source

One-third-arc-second NED, 2004 http://ned.usgs.gov/

Hydrography source

National Hydrography Dataset (NHD) - High-resolution, 2004 http://nhd.usgs.gov/

Hydrologic unit "walls" source

Watershed Boundaries Dataset, 2005, http://www.idwr.idaho.gov/watersheds/default.htm

Gage basin boundaries source

not used

Interactive map snapping tolerance

3 cells

Basin Characteristics Methods and Sources

Name

Description

Computation method

Data source

Report

Variable label in report

CROPS

Percent of area covered by agriculture

percent of area

Data are from: Rhode Island Geographic Information System, 2008, Land use–2003/2004: Rhode Island Geographic Information System, accessed February 10, 2008, at http://www.edc.uri.edu/rigis/data/data.aspx?ISO=environment; Massachusetts Office of Geographic Information, 2009, Land use (2005): Massachusetts Office of Geographic Information, accessed August 23, 2009, at http://www.mass.gov/anf/research-and-tech/it-serv-and-support/application-serv/office-of-geographic-information-massgis/datalayers/lus2005.html; and University of Connecticut Center for Land Use Education and Research, 2007, Connecticut land cover [2002]: University of Connecticut Center for Land Use Education and Research, accessed May 23, 2007, at http://clear.uconn.edu/data/index.htm.

Bent and others (2014)

not used

CRSDFT

Percent of area underlain by surficial geology (stratified drift deposits)

percent of area

Data (1:24,000 scale) are from: Rhode Island Geographic Information System, 2007, Glacial deposits: Rhode Island Geographic Information System, accessed June 8, 2007, at http://www.edc.uri.edu/rigis/data/data.aspx?ISO=geoscientificInformation; Massachusetts Office of Geographic Information, 2007b,
Surficial geology 1:24,000: Massachusetts Office of
Geographic Information, accessed October, 1, 2007, at
http://www.mass.gov/anf/research-and-tech/it-serv-and-support/application-serv/office-of-geographic-information-massgis/datalayers/sg24k.html; and University of Connecticut Map and Geographic Information Center, 2007, Connecticut surficial materials: University of Connecticut Map and Geographic Information Center, accessed May 23, 2007, at http://magic.lib.uconn.edu/connecticut_data.html#environmental.

Bent and others (2014)

not used

CSL10_85

10-85 slope in feet per mile based on preprocessed data

slope between 10 and 85 percent of main channel distance.

National Hydrography Dataset (NHD) 1:24,000 at http:nhd.usgs.gov.

Bent and others (2014)

not used

DRNAREA

Drainage area in square miles

polygon area

GlobalWatershed

Zarriello and others (2012) and Bent and others (2014)

DA and DRNAREA, respectively

ELEV

Average basin elevation in feet

average

U.S. Geological Survey, 2007, National Elevation Dataset: U.S. Geological Survey, accessed June 8, 2007, at
http://ned.usgs.gov/.

Bent and others (2014)

not used

FOREST

Percent of area covered by forest

percent of area

Data are from: Rhode Island Geographic Information System, 2008, Land use–2003/2004: Rhode Island Geographic Information System, accessed February 10, 2008, at http://www.edc.uri.edu/rigis/data/data.aspx?ISO=environment; Massachusetts Office of Geographic Information, 2009, Land use (2005): Massachusetts Office of Geographic Information, accessed August 23, 2009, at http://www.mass.gov/anf/research-and-tech/it-serv-and-support/application-serv/office-of-geographic-information-massgis/datalayers/lus2005.html; and University of Connecticut Center for Land Use Education and Research, 2007, Connecticut land cover [2002]: University of Connecticut Center for Land Use Education and Research, accessed May 23, 2007, at http://clear.uconn.edu/data/index.htm.

Bent and others (2014)

not used

LC11DEV

Percentage of urban land cover determined from NLCD 2011 land cover dataset

percent of area

NLCD 2011, codes 21-24 http://www.mrlc.gov/nlcd2011_data.php

Bent and others (2014)

not used

LC11IMP

Percentage of impervious area determined from NLCD 2011 impervious dataset

area-weighted mean

NLCD 2011 imperviousness grid http://www.mrlc.gov/nlcd2011_data.php

Bent and others (2014)

not used

LFPLENGTH

Length of associated Longest Flow Path in miles

length

U.S. Geological Survey, 2007, National Hydrography Dataset: U.S. Geological Survey, accessed June 8, 2007, at http://nhd.usgs.gov/index.html.

Bent and others (2014)

not used

STORNHD

Percent of area as storage (hi-res NHD waterbodies, wetlands)

percent of area

National Land Cover Dataset (NLCD) 2006 at http://www.epa.gov/mrlc/nlcd-2006.html.

Zarriello and others (2012)

StorNHD

STRDEN

Stream Density NHD

STRMTOT / DRNAREA

Computed with appropriate units conversions.

Zarriello and others (2012)

STRDEN

STRDENED

Stream Density edited NHD

STRMTOTED / DRNAREA

Computed with appropriate units conversions.

Bent and others (2014)

STRDENED

STRMTOT

Total stream length in miles - NHD

length

National Hydrography Dataset (NHD) 1:24,000 at http:nhd.usgs.gov.

Zarriello and others (2012)

not used

STRMTOTED

Total stream length in miles - edited NHD

length

U.S. Geological Survey, 2007, National Hydrography Dataset: U.S. Geological Survey, accessed June 8, 2007, at http://nhd.usgs.gov/index.html.

Bent and others (2014)

not used

WATER

Percent of area covered by open water (lakes, ponds, reservoirs)

percent of area

Data are from: Rhode Island Geographic Information System, 2008, Land use–2003/2004: Rhode Island Geographic Information System, accessed February 10, 2008, at http://www.edc.uri.edu/rigis/data/data.aspx?ISO=environment; Massachusetts Office of Geographic Information, 2009, Land use (2005): Massachusetts Office of Geographic Information, accessed August 23, 2009, at http://www.mass.gov/anf/research-and-tech/it-serv-and-support/application-serv/office-of-geographic-information-massgis/datalayers/lus2005.html; and University of Connecticut Center for Land Use Education and Research, 2007, Connecticut land cover [2002]: University of Connecticut Center for Land Use Education and Research, accessed May 23, 2007, at http://clear.uconn.edu/data/index.htm.

Bent and others (2014)

not used

WETLAND

Percent of area covered by wetland land use

percent of area

Data are from: Rhode Island Geographic Information System, 2008, Land use–2003/2004: Rhode Island Geographic Information System, accessed February 10, 2008, at http://www.edc.uri.edu/rigis/data/data.aspx?ISO=environment; Massachusetts Office of Geographic Information, 2009, Land use (2005): Massachusetts Office of Geographic Information, accessed August 23, 2009, at http://www.mass.gov/anf/research-and-tech/it-serv-and-support/application-serv/office-of-geographic-information-massgis/datalayers/lus2005.html; and University of Connecticut Center for Land Use Education and Research, 2007, Connecticut land cover [2002]: University of Connecticut Center for Land Use Education and Research, accessed May 23, 2007, at http://clear.uconn.edu/data/index.htm.

Bent and others (2014)

not used

 

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