Matthew T. Whitehead 20020201 (Version 1.0, January 17, 2002) raster digital data USGS Water-Resources Investigation Report USGS WRIR 02-4068 Columbus, Ohio U.S. Geological Survey http://water.usgs.gov/lookup/getspatial?varindexgrid A generalized streamflow-variability index coverage was created by interpolating a grid (with 6,066-ft^2 cells) from at-site values of the streamflow-variability index computed for 133 rural, unregulated streamflow-gaging stations in Ohio and nearby areas of adjacent states. Grid interpolation was done by means of the interpolate surface routine contained in the Spatial Analyst extension of ArcView. The inverse distance weighting (IDW) algorithm was used based on the 12 nearest neighbors. The streamflow-variability index at a streamflow-gaging station is defined as the standard deviation of the logarithms of the 19 streamflow values at 5-percent class intervals from 5 to 95 percent on the flow-duration curve (Searcy, 1959) of daily mean streamflow for the analysis period. Searcy, J.K., 1959, Flow-duration curves, manual of hydrology-part 2, low-flow techniques: U.S. Geological Survey Water-Supply Paper 1542-A, 33 p. This coverage was used to determine an estimate of the streamflow variability index at a given location on streams in Ohio. This information is required to use regression equations presented by Koltun and Whitehead (2002). Koltun, G.F., and Whitehead, M.T., 2002, Techniques for Estimating Selected Streamflow Characteristics of Rural, Unregulated Streams in Ohio: U.S. Geological Survey Water-Resources Investigations Report 02-4068 Notes: Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although this Federal Geographic Data Committee-compliant metadata file is intended to document the data set in nonproprietary form, as well as in ArcInfo format, this metadata file may include some ArcInfo-specific terminology. 2002 Publication Date Complete None Planned -85.23894406 -80.21633057 42.07920262 38.3753101 none streamflow variability index inlandWaters none Ohio none These data are intended for use with regression models given in Koltun and Whitehead (2002). Suitability for other uses has not been determined. Matthew T Whitehead U.S. Geological Survey mailing address

6480 Doubletree Avenue

Columbus Ohio 43229 USA 1-888-275-8747 (614) 430-7777 (mtwhiteh@usgs.gov) Windows_NT, 5.0, Intel ArcInfo version 8.0.2 unknown Not applicable for raster data. 100% unknown U.S. Geological Survey 20010522 computer program 20010522 publication USGS Original streamflow variability indices were computed from daily streamflow data in NWIS by means of DVSTAT program A generalized streamflow-variability index coverage was created by interpolating a grid (with 6,066-ft^2 cells) from at-site values of the streamflow-variability index computed for 133 rural, unregulated streamflow-gaging stations in Ohio and nearby areas of adjacent states. Grid interpolation was done by means of the interpolate surface routine contained in the Spatial Analyst extension of ArcView. The inverse distance weighting (IDW) algorithm was used based on the 12 nearest neighbors. 20010522 Raster Grid Cell 222 225 State Plane Coordinate System 1927 5001 38.733333 40.033333 -82.5 38. 609601.21920 0.0 coordinate pair 6066.436726005 6066.436726005 Feet North American Datum of 1927 Clarke 1866 6378206.4 294.98 The field "Value" contains the estimated streamflow-variability index for the grid cell. The range of values for streamflow-variability index is approximately 0.24-1.13. > >VARINDEXGRID.STA: > >COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC ALTERNATE NAME > 1 MIN 8 15 F 3 > 9 MAX 8 15 F 3 > 17 MEAN 8 15 F 3 > 25 STDV 8 15 F 3 > > none U.S. Geological Survey Ask USGS - Water Webserver Team mailing

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Reston VA 20192 1-888-275-8747 (1-888-ASK-USGS) http://answers.usgs.gov/cgi-bin/gsanswers?pemail=h2oteam&subject=GIS+Dataset+varindexgrid Although this data set has been used by the U.S. Geological Survey, U.S. Department of the Interior, no warranty expressed or implied is made by the U.S. Geological Survey as to the accuracy of the data and related materials. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the U.S. Geological Survey in the use of this data, software, or related materials. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Export Full coverage zipped 1 http://water.usgs.gov/GIS/dsdl/varindexgrid.e00.gz Other sdts file zipped 1 http://water.usgs.gov/GIS/dsdl/varindexgrid.sdts.tgz None. This dataset is provided by USGS as a public service. 20041108 U.S. Geological Survey Ask USGS -- Water Webserver Team mailing

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Reston VA 20192 1-888-275-8747 (1-888-ASK-USGS) http://answers.usgs.gov/cgi-bin/gsanswers?pemail=h2oteam&subject=GIS+Dataset+varindexgrid FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998