Hitt, K.J. Nakagaki, N. 20060131 1 Vector digital data Reston, Virginia, USA U.S. Geological Survey http://water.usgs.gov/lookup/getspatial?nawqacyc2 This is a coverage of the boundaries and codes used for the U.S. Geological Survey's National Water-Quality Assessment (NAWQA) Program Study-Unit investigations in the conterminous United States, excluding the High Plains Regional Ground-Water Study. The data set represents the areas to be studied during the second cycle of the NAWQA Program, from 2001-2012 ("cycle 2"). The National Water-Quality Assessment Program is a primary source for long-term, nationwide information on the quality of streams, ground water, and aquatic ecosystems (Gilliom and others, 2001). The goals of NAWQA are to assess the status and trends in the quality of the Nation's ground- and surface-water resources and to provide a sound understanding of the natural and human factors that affect the quality of these resources (Leahy and others, 1990). Study Units are defined by major river basins and aquifers across the Nation (Gilliom and others, 2001). This coverage contains the boundaries for the Study Units within the conterminous United States (excluding the High Plains Regional Ground Water-Study) that were defined for cycle 2 of NAWQA. During cycle 1 of NAWQA (1991-2001), 51 studies actually were undertaken (49 in the conterminous U.S. excluding the High Plains Regional Ground Water Study and one each in Alaska and Hawaii), and 8 were not scheduled. The boundaries and codes for cycle 1 Study Units in the conterminous U.S. are maintained in a separate data set (NAWQACYC1). That coverage depicts 57 Study Units: 49 actually studied and 8 not scheduled. The second cycle of NAWQA (2001-2012) adjusted its scope to 42 of these important river basins and aquifer systems to accommodate budget reductions. Cycle 2 began with 14 Study Units in 2001. This coverage (NAWQACYC2) depicts the 42 Study Units defined for cycle 2 excluding the High Plains Regional Ground Water Study. Although the boundaries of most Study Units remain the same in cycle 2, TENN (UTEN+LTEN), CCYK (CCPT+YAKI), PODL (POTO+DLMV), and WHMI (WHIT+MIAM) are combinations of two Study Units assessed in the first cycle. The coverage also includes the name, starting date, and NAWQA standard abbreviation of each Study Unit plus various codes to help display the data. This data set is used primarily to display the location of NAWQA Study Units and for analysis of data at the national scale. It is not recommended for either local or regional analysis due to the small scale of most of the features. This coverage is composed of linear features at various scales (for example, 1:100,000, 1:250,000), but the majority remain at the 1:2,000,000 scale. The coverage is reviewed by one of the NAWQA National Synthesis GIS staff members prior to release. The High Plains Regional Ground-Water Study (1999-2004) boundary is in a separate data set. References Gilliom, R.J., Alley, W.M., and Gurtz, M.E., 1995, Design of the National Water-Quality Assessment Program--Occurrence and distribution of water-quality conditions: U.S. Geological Survey Circular 1112, U.S. Geological Survey, Sacramento, California, 33 p. Available through the internet at http://water.usgs.gov/pubs/circ/circ1112/. Gilliom, R.J., Hamilton, P.A., and Miller, T.L., 2001, The National Water-Quality Assessment Program--Entering a new decade of investigations: U.S. Geological Survey Fact Sheet 071-01. Available through the internet at http://water.usgs.gov/pubs/FS/fs-071-01/pdf/fs07101.pdf. Hamilton, P.A., Miller, T.L., and Myers, D.N., 2004, Water Quality in the Nation's Streams and Aquifers--Overview of Selected Findings, 1991-2001: U.S. Geological Survey Circular 1265, 20 p. Available through the internet at http://pubs.usgs.gov/circ/2004/1265/. Leahy, P.P., Rosenshein, J.S., and Knopman, D.S., 1990, Implementation plan for the National Water-Quality Assessment Program: U.S. Geological Survey Open-File Report 90-174. U.S. Geological Survey, Reston, Virginia, 10 p. Leahy, P.P. and Thompson, T.H., 1994, National Water-Quality Assessment Program: U.S. Geological Survey Open-File Report 94-70, 4 p. Available through the internet at http://water.usgs.gov/nawqa/NAWQA.OFR94-70.html. 2002 Current as of publication date. Complete This data set represents the initial version of cycle 2 study unit boundaries that exist at the start of the second decade of study. -127.872474 -65.356310 51.601234 22.877918 None National Water-Quality Assessment Program NAWQA Water quality Surface water Ground water River basin Aquifer system inlandWaters None Conterminous United States None None None 2001-2012 None. Accuracy is good at 1:2,000,000 or smaller in most cases. The Study-Unit source maps come from various sources and scales. Kerie J. Hitt U.S. Geological Survey mailing address

12201 Sunrise Valley Drive, MS-413

Reston VA 20192 USA 1-888-275-8747 703-648-6693 kjhitt@usgs.gov 9:00am-5:30pm EST Please contact through email http://water.usgs.gov/nawqa/map/cyc2_browse.gif This is an image of a national map showing the cycle 2 NAWQA Study Unit boundaries. GIF Microsoft Windows XP Version 5.1 (Build 2600 Service Pack 1); ARC/INFO version 9.0 Hitt, K.J. Nakagaki, N. 20060131 6.1 Vector digital data Reston, Virginia, USA U.S. Geological Survey http://water.usgs.gov/lookup/getspatial?nawqacyc1 Hitt, K.J. 20060131 1.1 Vector digital data Reston, Virginia, USA U.S. Geological Survey http://water.usgs.gov/lookup/getspatial?nawqagencyc1 Hitt, K.J. 20060131 1.0 Vector digital data Reston, Virginia, USA U.S. Geological Survey http://water.usgs.gov/lookup/getspatial?nawqagencyc2 See Entity_Attribute_Information See Explanation Where present, is described with each attribute defined in the Entity and Attribute Section. The data set was checked for topological consistency using the Arc/INFO commands BUILD and LABELERRORS. The NAWQA polygon attribute is no longer consecutive because of study units that have merged (e.g. WHIT and MIAM) and study units that have been deleted. The data set contains NAWQA boundaries (excluding HPGW) for the conterminous United States. Hitt, Kerie Nakagaki, Naomi 19990701 6.1 Vector digital data Reston, VA, USA U.S. Geological Survey http://water.usgs.gov/lookup/getspatial?nawqacyc1 2000000 digital files 2001 publication date NAWQACYC1 Cycle 1 NAWQA Study-Unit boundaries and feature attributes that served as the initial source of the cycle 2 NAWQA Study-Unit boundaries and attributes. 1. Made a copy of the source coverage "NAWQACYC1" (description above) 2. Dissolved boundaries between: -WHIT and MIAM to create new merged Study Unit, WHMI -LTEN and UTEN to create new merged Study Unit, TENN 3. Added and populated polygon attributes, NEWSUID and NEWGROUP 200005 1. Updated line attributes to reflect the 3 new groups of study units. 200005 1. Updated several full Study Units names and abbreviations. 2. Added and populated arc attribute, GXBND , to uniquely identify LSUS (only Study Unit with selective surface-water monitoring) 3. Coded NEWGROUP = 'X' for LSUS polygon. 200011 Replaced SOCA's (formerly SANA) boundary with new boundary provided by JoAnn Gronberg. The Study Unit has been extended in the northern section. 200012 Revised the polygon attribute table and arc attribute table to more closely match those of NAWQACYC1 coverage. Original items in interim cycle 2 coverage .pat file: >NAWQA 4 4 I - >NAME 50 50 C - >NEWSUID 4 4 C - ABBV2 >NEWGROUP 2 2 C - Y42 >GROUP 2 2 I - >PILOT 1 1 I - >SUID 4 4 C - >INTL 1 1 I - >MI2 4 10 F 0 >REGION 1 1 C - Revised items in cycle 2 coverage .pat file: >NAWQA 4 4 I - >NAME 50 50 C - >GROUP 2 2 I - >SUID 4 4 C - ABBV >INTL 1 1 I - >MI2 4 10 F 0 >REGION 1 1 C - Original items in interim cycle 2 coverage .aat file: >USBND 1 1 I - >INTL 1 1 I - CANADA >SUBND 1 1 I - >G1BND 1 1 I - >G4BND 1 1 I - >G7BND 1 1 I - >G9BND 1 1 I - >GXBND 1 1 I - Revised items in cycle 2 coverage .aat file: >USBND 1 1 I - >INTL 1 1 I - >SUBND 1 1 I - >G1BND 1 1 I - >G2BND 1 1 I - >G3BND 1 1 I - >G4BND 1 1 I - Changed values of NAWQA groups from 01, 04, 07, 09, and X to: 1 (group 1 scheduled to be studied 2001-05), 2 (group 2 scheduled to be studied 2004-08), 3 (group 3 scheduled to be studied 2007-2011), and 4 (group 4 studied during cycle 1 but discontinued for study during cycle 2 of NAWQA - ALMN, KANA, LSUS, NROK, REDN). Deleted Study Units never studied during cycle 1 and discontinued for cycle 2: CHEY, KNTY, MARK, NPLT, SHPL, UARK. Coded annotation $level to match Study Unit group. 200211 Revised names to match those in USGS Fact Sheet 071-01. 20021122 Removed study units assessed during cycle 1 but discontinued during cycle 2: ALMN, KANA, LSUS, NROK, REDN. Removed group 4 attributes - deleted G4BND item from .aat and deleted annotation. Removed 14 pseudo nodes. 20021202 Calculated cover-id equal to cover# - 1. 20021202 Updated study unit names to match those published in USGS Circular 1265. (http://pubs.usgs.gov/circ/2004/1265/) Changed NAME field to be 62 characters. 20060127 Vector Complete chain 3090 Label point 1435 GT-polygon composed of chains 1435 Point 60 Label point 43 Albers Conical Equal Area 29.5 45.5 -96 23 0.00000 0.00000 coordinate pair 0.002334 0.002334 METERS North American Datum of 1983 GRS1980 6378137.000 298.257222 NAWQACYC2.AAT Arc Attribute Table NAWQA FNODE# Internal number of from-node Computed Positive real numbers that are automatically generated. TNODE# Internal number of to-node Computed Positive real numbers that are automatically generated. LPOLY# Internal number of polygon to left of arc Computed Positive real numbers that are automatically generated. RPOLY# Internal number of polygon to right of arc Computed Positive real numbers that are automatically generated. LENGTH Length of arc in coverage units Computed Positive real numbers that are automatically generated. NAWQACYC2# Internal feature number Computed Positive real numbers that are automatically generated. NAWQACYC2-ID User-assigned feature number User-defined Positive real numbers that are automatically generated. USBND Flag for US boundary NAWQA 1,0 1=US boundary; 0=not US boundary User assigned INTL Flag for arcs in Canada or Mexico NAWQA 1,0 1=Canada or Mexico arc; 0=U.S. arc User assigned G1BND Flag for group 1 boundaries NAWQA 1,0 1=group 1 boundary; 0=not group 1 boundary User assigned G2BND Flag for group 2 boundaries NAWQA 1,0 1=group 2 boundary; 0=not group 2 boundary User assigned G3BND Flag for group 3 boundaries NAWQA 1,0 1=group 3 boundary; 0=not group 3 boundary User assigned SUBND Flag for Study-Unit boundaries NAWQA 1,0 1=Study-Unit boundary; 0=not Study-Unit boundary User assigned NAWQACYC2.PAT Polygon Attribute Table GIS software AREA Area of polygon in square coverage units (square meters) Computed Positive real numbers that are automatically generated. PERIMETER Perimeter of polygon in coverage units (meters) Computed Positive real numbers that are automatically generated. NAWQACYC2# Internal feature number Computed Positive real numbers that are automatically generated. NAWQACYC2-ID User-assigned feature number User-defined Integer n/a GIS software NAWQA Assigned NAWQA Study-Unit number NAWQA program 1-57, 0 Loosely based on WRD region. Values 1-57 are NAWQA Study Units. 0 is not a NAWQA Study Unit. User assigned NAME Name of Study-Unit NAWQA program NAWQA Study-Unit names See table 1. User assigned GROUP Code for starting date of Study Unit NAWQA program 1,2,3,0 1= to be studied 2001-05; 2= to be studied 2004-08; 3= to be studied 2007-2011; 0= Not a NAWQA Study Unit. User assigned SUID 4-letter abbreviation for Study Unit NAWQA program See table 1. See Entity_and_Attribute_Overview User assigned INTL Flags polygons in Canada (PUGT,CONN) or Mexico (CAZB) NAWQA 1,0 1=in Canada or Mexico; 0=not in Canada or Mexico User assigned MI2 Area of polygon in square miles NAWQA Real numbers AREA * .0000003861 User assigned REGION USGS water-resources administrative region USGS N, S, C, W USGS Water Resources Division administrative region: N=northeastern; S=southeastern; C=central; W=western User assigned There are two attribute files associated with this coverage. An arc attribute table (.AAT): >DATAFILE NAME: NAWQACYC2.AAT > 9 ITEMS: STARTING IN POSITION 1 > COL ITEM NAME WDTH OPUT TYP N.DEC > 01 FNODE# 4 5 B - > 05 TNODE# 4 5 B - > 09 LPOLY# 4 5 B - > 13 RPOLY# 4 5 B - > 17 LENGTH 4 12 F 3 > 21 NAWQACYC2# 4 5 B - > 25 NAWQACYC2-ID 4 5 B - > 29 USBND 1 1 I - > 30 INTL 1 1 I - > 31 SUBND 1 1 I - > 32 G1BND 1 1 I - > 33 G2BND 1 1 I - > 34 G3BND 1 1 I - where: >arcs representing the boundary of the United States are flagged USBND = 1 >arcs representing Study-Unit boundaries in Canada or Mexico > are flagged INTL = 1 >arcs representing Study-Unit boundaries are flagged SUBND = 1 >arcs representing group 1 Study-Unit boundaries are flagged G1BND = 1 >arcs representing group 2 Study-Unit boundaries are flagged G2BND = 1 >arcs representing group 3 Study-Unit boundaries are flagged G3BND = 1 AND a polygon attribute table (.PAT): >DATAFILE NAME: NAWQACYC2.PAT >11 ITEMS: STARTING IN POSITION 1 >COL ITEM NAME WDTH OPUT TYP N.DEC ALTERNATE NAME > 01 AREA 4 12 F 3 > 05 PERIMETER 4 12 F 3 > 09 NAWQACYC2# 4 5 B - > 13 NAWQACYC2-ID 4 5 B - > 17 NAWQA 4 4 I - > 21 NAME 62 62 C - > 83 GROUP 2 2 I - > 85 SUID 4 4 C - ABBV > 89 INTL 1 1 I - > 90 MI2 4 10 F 0 > 94 REGION 1 1 C - NAWQA is the Study-Unit number, which is a sequential number from 1-57. The numbers originally were based on administrative regions and were in sequence, but are not anymore because of the Study Units that have merged. See table 1. NAME contains the full name of the Study Unit. See table 1. GROUP represents the assessment schedule of Study-Unit investigations: >Group 1 = To be assessed during 2001-2005 >Group 2 = To be assessed during 2004-2008. >Group 3 = To be assessed during 2007-2011. SUID contains the 4-letter abbreviation for the Study Unit. The alternate name is ABBV. See table 1. INTL flags those polygons located in Canada or Mexico. Usually polygons outside of the United States are NOT plotted on national displays of the boundaries. INTL is in both the .AAT and the .PAT and is used primarily for plotting purposes. (USBND, SUBND, G1BND, G2BND, G3BND, and G4BND are in the .AAT and are also used for plotting.) MI2 is the area of an individual polygon in square miles, calculated as MI2 = AREA * .0000003861. To find the area of an entire Study Unit, sum the areas of the individual polygons comprising the Study Unit. REGION is the USGS water resources administrative region: >N = Northeast >S = Southeast >C = Central >W = Western Table 1.--NAWQA cycle 2 4-letter abbreviations (SUID), names (NAME), and numbers (NAWQA). > SUID NAME (NAWQA NUMBER) >ACAD Acadian-Pontchartrain Drainages (28) >ACFB Apalachicola-Chattahoochee-Flint River Basin (22) >ALBE Albemarle-Pamlico Drainage Basin (19) >CACI Canadian-Cimarron River Basins (32) >CAZB Central Arizona Basins (49) >CCYK Central Columbia Plateau - Yakima River Basin (50) >CNBR Central Nebraska Basins (35) >CONN Connecticut, Housatonic and Thames River Basins ( 2) >DELR Delaware River Basin ( 5) >EIWA Eastern Iowa Basins (30) >GAFL Georgia-Florida Coastal Plain (23) >GRSL Great Salt Lake Basins (47) >HDSN Hudson River Basin ( 3) >KANS Kansas River Basin (36) >LERI Lake Erie - Lake Saint Clair Drainages (11) >LINJ Long Island - New Jersey Coastal Drainages ( 4) >LIRB Lower Illinois River Basin (15) >MISE Mississippi Embayment (27) >MOBL Mobile River Basin (26) >NECB New England Coastal Basins ( 1) >NVBR Las Vegas Valley Area and the Carson and Truckee River Basins (55) >OZRK Ozark Plateaus (31) >PODL Potomac River Basin and Delmarva Peninsula ( 8) >PUGT Puget Sound Basin (52) >RIOG Rio Grande Valley (45) >SACR Sacramento River Basin (54) >SANJ San Joaquin-Tulare Basins (56) >SANT Santee River Basin and Coastal Drainages (21) >SCTX South-Central Texas (34) >SOCA Southern California Coastal Drainages (57) >SOFL Southern Florida (24) >SPLT South Platte River Basin (40) >TENN Tennessee River Basin (29) >TRIN Trinity River Basin (33) >UCOL Upper Colorado River Basin (44) >UIRB Upper Illinois River Basin (14) >UMIS Upper Mississippi River Basin (17) >USNK Upper Snake River Basin (48) >WHMI White, Great and Little Miami River Basins (13) >WILL Willamette Basin (53) >WMIC Western Lake Michigan Drainages (16) >YELL Yellowstone River Basin (43) >----------------------------------------------------------------------- > High Plains (not included in this data set) >----------------------------------------------------------------------- > HPGW HIGH PLAINS REGIONAL GROUND WATER STUDY -- The coverage also contains annotation showing the 4-letter Study-Unit abbreviations. Annotation codes: >$level = 1 (group 1 abbreviations) >$level = 2 (group 2 abbreviations) >$level = 3 (group 3 abbreviations) Not Available U.S. Geological Survey Ask USGS - Water Webserver Team mailing

445 National Center

Reston VA 20192 1-888-275-8747 (1-888-ASK-USGS) http://water.usgs.gov/user_feedback_form.html 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 Arc/INFO Export file zipped 1 http://water.usgs.gov/GIS/dsdl/nawqacyc2.e00.gz Shape Shape file zipped 1 http://water.usgs.gov/GIS/dsdl/nawqacyc2.tar.gz None. This dataset is provided by USGS as a public service. 20060130 U.S. Geological Survey Ask USGS -- Water Webserver Team mailing

445 National Center

Reston VA 20192 1-888-275-8747 (1-888-ASK-USGS) http://answers.usgs.gov/cgi-bin/gsanswers?pemail=h2oteam&subject=GIS+Dataset+nawqacyc2 FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998