David Wolock 2003 Unknown Flow characteristics at U.S. Geological Survey streamgages in the conterminous United States. vector digital data U.S. Geological Survey Open-File Report 03-146 Reston, VA U.S. Geological Survey http://water.usgs.gov/lookup/getspatial?qsitesdd This dataset represents point locations and flow characteristics for current (as of November 20, 2001) and historical U.S. Geological Survey (USGS) streamgages in the conterminous United States. The flow characteristics were computed from the daily streamflow data recorded at each streamgage for the period of record. The attributes associated with each streamgage include: Station number Station name Station latitude (decimal degrees in North American Datum of 1983, NAD 83) Station longitude (decimal degrees in NAD 83) First date (year, month, day) of streamflow data Last date (year, month, day) of streamflow data Number of days of streamflow data Minimum and maximum daily flow for the period of record (cubic feet per second) Percentiles (1, 5, 10, 20, 25, 50, 75, 80, 90, 95, 99) of daily flow for the period of record (cubic feet per second) Average and standard deviation of daily flow for the period of record (cubic feet per second) Mean annual base-flow index (BFI: see supplemental information) computed for the period of record (fraction, ranging from 0 to 1) Year-to-year standard deviation of the annual base-flow index computed for the period of record (fraction) Number of years of data used to compute the base-flow index (years) Reported drainage area (square miles) Reported contributing drainage area (square miles) National Water Information System (NWIS)-Web page URL for streamgage Hydrologic Unit Code (HUC, 8 digit) Hydrologic landscape region (HLR) River Reach File 1 (RF1) segment identification number (E2RF1##) Station numbers, names, locations, and drainage areas were acquired through the National Water Information System (NWIS)-Web (http://water.usgs.gov/nwis) on November 20, 2001. The streamflow data used to compute flow characteristics were copied from the Water server (water.usgs.gov:/www/htdocs/nwisweb/data1/discharge/) on November 2, 2001. The missing value indicator for all attributes is -99. Some streamflow characteristics are missing for: (1) streamgages measuring flow subject to tidal effects, which cause flow to reverse directions, (2) streamgages with site information but no streamflow data at the time the data were retrieved, and (3) streamgages with record length too short to compute the base-flow index. These data were compiled to provide summary information about current and historical USGS streamgages in the conterminous United States. The USGS has several programs (including the National Water-Quality Assessment Program and the National Streamflow Information Program) that need the summary data for improvement of study design and analysis. Base-flow index estimation: A base-flow index (BFI) was computed for the streamgages using a Fortran program written by Tony Wahl (Bureau of Reclamation. U.S. Department of the Interior) and Ken Wahl (U.S. Geological Survey) (http://www.usbr.gov/pmts/hydraulics_lab/twahl/bfi/index.html). The computer program name is bfi41.f and was the most current version available at the time. The computer program was compiled on a Sun Unix system and run with the default parameter values. The BFI Web page (http://www.usbr.gov/pmts/hydraulics_lab/twahl/bfi/index.html) states: "The BFI program was developed to make the base-flow separation process less tedious and more objective. The program implements a deterministic procedure proposed in 1980 by the British Institute of Hydrology. The method combines a local minimums approach with a recession slope test. The program estimates the annual base-flow volume of unregulated rivers and streams and computes an annual base-flow index (BFI, the ratio of base flow to total flow volume for a given year) for multiple years of data at one or more gage sites. Although the method may not yield the true base flow as might be determined by a more sophisticated analysis, the index has been found to be consistent and indicative of base flow, and thus may be useful for analysis of long term base-flow trends. Users should be very cautious about using methods such as this for short-term storm events or for locations where streamflow is affected by upstream regulation, such as reservoir releases. In general, the method interprets most regulated releases as base flow. If the program is used for regulated streams, the effects of regulation must be carefully accounted for through manual adjustment of the program output." BFI references: Wahl, K.L., and Wahl, T.L., 1995, Determining the flow of Comal Springs at New Braunfels, Texas, In Proceedings of Texas Water '95, American Society of Civil Engineers, August 16-17, 1995 San Antonio, Texas: American Society of Civil Engineers, p. 77-86, information available on the World Wide Web, accessed March 25, 2003 , at URL http://www.usbr.gov/pmts/hydraulics_lab/twahl/bfi/texaswater95/comalsprings.html Wahl, K.L., and Wahl, T.L., 1988, Effects of regional ground-water declines on streamflows in the Oklahoma Panhandle, In Proceedings of Symposium on Water-Use Data for Water Resources Management: Tucson, Arizona, American Water Resources Association, p. 239-249, information available on the World Wide Web, accessed March 25, 2003, at URL http://www.usbr.gov/pmts/hydraulics_lab/twahl/bfi/bfi_beaver_river.pdf The use of firm, trade, and brand names is for identification purposes only and does not constitute endorsement by the U.S. government. 2001 ground condition Complete None planned -124.669121 -67.248322 49.002617 25.320950 None U.S. Geological Survey streamgage flow characteristics None None David Wolock U.S. Geological Survey Research Hydrologist mailing address
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Lawrence KS 66049 USA 785-832-3528 785-832-3500 dwolock@usgs.gov None Unclassified None Microsoft Windows 2000 Version 5.1 (Build 2600) Service Pack 1; ESRI ArcCatalog 8.2.0.700 none none U.S. Geological Survey Unknown Unknown NWIS-Web streamflow data 1.0 vector digital data http://waterdata.usgs.gov/nwis Digital Data 20011102 ground condition USGS-NWIS Point locations and hydrologic data The steps used to generate the dataset are listed below. 1. The station identification number, station name, degrees-minutes-seconds (DMS) latitude, DMS longitude, latitude-longitude datum, State code, drainage area, and contributing drainage for each streamgage with daily discharge values in all States in the conterminous United States were obtained from NWIS-Web (http://water.usgs.gov/nwis). 2. The ARCINFO computer program infopoint.aml (Curtis Price, USGS, written commun., 2001) was used to generate a point coverage of the streamgage locations. In generating the point coverage, all the North American Datum of 1927 (NAD 27) points were projected into NAD 83. 3. Daily streamflow data for all streamgages were copied from the files located in the subdirectories of water.usgs.gov/www/htdocs/nwisweb/data1/discharge/. 4. The Perl program getstat.pl (Xiaodong Jian, USGS, written commun., 2001) was used to compute the time period and flow statistics for each streamgage. 5. A base-flow index (BFI) program (http://www.usbr.gov/pmts/hydraulics_lab/twahl/bfi/) was used to estimate the fraction of "base flow" in total streamflow. Base flow is the slowly varying component of streamflow and is assumed to be from ground-water discharge to streams. (See Supplemental_Information.) 6. The dataset was projected into decimal degrees (NAD 83) and saved as a shapefile for compatibility with the National Atlas of the United States. In addition, the attribute table was saved as a tab-delimited text file for use in MapInfo, ArcView3, Atlas GIS, and Microsoft Excel. The use of firm, trade, and brand names is for identification purposes only and does not constitute endorsement by the U.S. Geological Survey. Unknown Point Label point 19589 Point 19589 0.00027 0.00027 Decimal degrees North American Datum of 1983 Geodetic Reference System 80 6378137.000000 298.257222 qsitesdd.pat Point attribute table Environmental Systems Research Institute (ESRI), Inc., Redlands, California FID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. Shape Feature geometry. ESRI Coordinates defining the features. AREA Area of feature in internal units squared. ESRI Area is always zero for point coverages. Values are automatically generated. PERIMETER Perimeter of feature in internal units. ESRI Perimeter is always zero for point coverages. Values are automatically generated. QSITESDD# Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. QSITESDD-ID User-defined feature number. ESRI Sequential unique whole numbers that are automatically generated. STATION_NO Station number NWIS-Web Station number is a unique identifier with up to 15 digits. YRMONDY1 First date (year, month, day) of daily streamflow data NWIS-Web 18831001 20000912 YEARMNDY YRMONDYN Last day (year, month, day) of daily streamflow data NWIS-Web 18891130 20010223 YEARMNDY AVE Average daily streamflow value (cubic feet per second) Wolock 0.00 1598860.00 cubic feet per second STD Standard deviation of daily streamflow values (cubic feet per second) Wolock 0.00 373909.31 cubic feet per second LONDD Longitude (NAD 83, decimal degrees) NWIS-Web -124.67 -67.248890 decimal degrees LATDD Latitude (NAD83, decimal degrees) NWIS-Web 25.32 49.00 decimal degrees NDAYS Number of days of historical streamflow data Wolock 0.00 46444.00 cubic feet per second MIN Minimum daily streamflow value (cubic feet per second) for the period of record Wolock 0.00 1290000.00 cubic feet per second P1 1st percentile daily streamflow value (cubic feet per second) for the period of record Wolock 0.00 1302800.00 cubic feet per second P5 5th percentile daily streamflow value (cubic feet per second) for the period of record Wolock 0.00 1310000.00 cubic feet per second P10 10th percentile daily streamflow value (cubic feet per second) for the period of record Wolock 0.00 1420000.00 cubic feet per second P20 20th percentile daily streamflow value (cubic feet per second) for the period of record Wolock 0.00 1513000.00 cubic feet per second P25 25th percentile daily streamflow value (cubic feet per second) for the period of record Wolock 0.00 1540000.00 cubic feet per second P50 50th percentile daily streamflow value (cubic feet per second) for the period of record Wolock 0.00 1600000.00 cubic feet per second P75 75th percentile daily streamflow value (cubic feet per second) for the period of record Wolock 0.00 1740000.00 cubic feet per second P80 80th percentile daily streamflow value (cubic feet per second) for the period of record Wolock 0.00 1740000.00 cubic feet per second P90 90th percentile daily streamflow value (cubic feet per second) for the period of record Wolock 0.00 1771000.00 cubic feet per second P95 95th percentile daily streamflow value (cubic feet per second) for the period of record Wolock 0.00 1800000.00 cubic feet per second P99 99th percentile daily streamflow value (cubic feet per second) for the period of record Wolock 0.00 1800000.00 cubic feet per second MAX Maximum daily streamflow value (cubic feet per second) for the period of record Wolock 0.00 3400000.00 cubic feet per second YEARSBFI Number of years used in the base-flow index computation Wolock 5.00 127.00 years BFI Average annual base-flow index value (fraction) Wolock 0.00 1.00 fraction BFISD Standard deviation of annual base-flow index value (fraction) Wolock 0.00 0.72 fraction STATION_NM Station name NWIS-Web Station name is the name of the streamgage. STATE_CD State code for the streamgage NWIS-Web 1 56 STATE_ABBV State abbreviation NWIS-Web Two-letter abbreviation for the state where the streamgage is located. DRAIN_AREA Reported drainage area (square miles) NWIS-Web 0.01 1130600.00 square miles CONTRIB_DR Reported contributing area (square miles) NWIS-Web 0.01 414900.00 square miles NWIS_URL NWIS-Web URL NWIS-Web NWIS-Web URL (Web address) HUC8 8-digit hydrologic unit code Wolock 1010001 18100200 HLR Hydrologic landscape region Wolock 1 20 SGRF1-ID River Reach File 1 (RF1) segment identification number (E2RF1##) David Stewart Unique number assigned to each RF1 segments. The streamgage characteristics include: Station number Station name Station latitude Station longitude NWIS-Web page URL for streamgage Reported drainage area (square miles) Reported contributing drainage area (square miles) Hydrologic Unit Code (HUC, 8 digit) Hydrologic landscape region (HLR) River Reach File 1 (RF1) segment identification number (E2RF1##) The flow-characteristics information for each streamgage include: Minimum and maximum daily flow for the period of record (cubic feet per second) Percentiles (1, 5, 10, 20, 25, 50, 75, 80, 90, 95, 99) of daily flow for the period of record (cubic feet per second) Average and standard deviation of daily flow for the period of record (cubic feet per second) Mean annual base-flow index (BFI) computed for the period of record (fraction, ranging from 0 to 1) Year-to-year standard deviation of the annual base-flow index computed for the period of record (fraction) Number of years of data used to compute the base-flow index (years) First date (year, month, day) of streamflow data Last date (year, month, day) of streamflow data Number of days of streamflow data 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+qsitesdd 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. Shape File Full coverage Winzipped 1 http://water.usgs.gov/GIS/dsdl/qsitesdd_shp.zip Export Full coverage Winzipped 1 http://water.usgs.gov/GIS/dsdl/qsitesdd.e00.zip Database File Full coverage Winzipped 1 http://water.usgs.gov/GIS/dsdl/qsitesdd.dbf.zip Export Full coverage Gunzipped 1 http://water.usgs.gov/GIS/dsdl/qsitesdd.e00.gz Shape Full coverage Gunzipped 1 http://water.usgs.gov/GIS/dsdl/qsitesdd_shp.gz Database File Full coverage Gunzipped 1 http://water.usgs.gov/GIS/dsdl/qsitesdd_dbf.gz Coverage Full coverage Tar-gunzipped 1 http://water.usgs.gov/GIS/dsdl/qsitesdd_shp.tgz Coverage Full coverage Gunzipped 1 http://water.usgs.gov/GIS/dsdl/qsitesdd.e00.tgz Database File Full coverage Gunzipped 1 http://water.usgs.gov/GIS/dsdl/qsitesdd.dbf.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+qsitesdd FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998