Total areas of cycle 1 and cycle 2 ground water studies (Land Use Studies and Subunit Surveys/Major Aquifer Studies) derived from GIS data layers
<URL:http://water.usgs.gov/nawqa-only/gw.html>
This is tabular data of areas calculated for GIS coverages and grids depicting the boundaries of land use studies (LUS) and subunit surveys (SUS)/major aquifer studies conducted by the National Water-Quality Assessment (NAWQA) study units.
If a study is a resampled study, even if the boundary did not change from cycle 1 to cycle 2, the area is listed in the file of cycle 1 studies AND in the file of cycle 2 studies. If a study is a new study, it is listed only in the file of cycle 2 studies.
This is one of the ancillary GIS data sets developed to characterize NAWQA ground water studies for national synthesis of water-quality data.
The coverage naming convention is netcode_bnd (for example, LUSCR1_BND), or netcode_trg (for example LUSCR1_TRG.) The BND coverages represent the entire areal extent of the hydrogeologic unit defined for study. The TRG coverages represent the targeted land use within the overall area described by the BND coverage. The targeted land use coverage is supposed to nest within the overall boundary coverage, but this is not always the case.
For internal USGS use only.
For internal USGS use only.
kjhitt@usgs.gov
Each ground water study is represented first as a polygon coverage. Then the polygons are gridded at 30 meters to represent the ground water study area in raster format. The raster format is used to derive ancillary GIS data for the studies.
Total area of polygons in each ground water study is the sum of the area of all polygons coded as being within the ground water study.
Total area of grid cells in each ground water study is the number of cells coded as being in the ground water study multiplied by the area of each cell (900 square meters).
Old data:
SUID SUCODE AREAID POLYAREAM2 GRIDAREAM2 DIFF_POLY_GRID dlmv dlmvluscr1 dlmvluscr1_trg 7748903628.086990 6854794200 0.1154 hpgw hpgwlusag3 hpgwlusag3_trg 10524089949.069900 11436385500 -0.0867New data:
SUID SUCODE AREAID POLYAREAM2 GRIDAREAM2 DIFF_POLY_GRID dlmv dlmvluscr1 dlmvluscr1_trg 6855363276.059000 6854794200 0.0001 hpgw hpgwlusag3 hpgwlusag3_trg 10524089949.069900 10523822400 0.0000
Old data:
SUID SUCODE AREAID POLYAREAM2 GRIDAREAM2 DIFF_POLY_GRID wmic wmiclusag2 wmiclusag2_trg 3968017506.207990 2088711900 0.4736New data:
SUID SUCODE AREAID POLYAREAM2 GRIDAREAM2 DIFF_POLY_GRID wmic wmiclusag2 wmiclusag2_trg 2088748898.189000 2088711900 0.0000
Added data for more cycle 2 studies: acadsus3, eiwasus3, lirblusrc1, trinsus4. Resampled studies (linjlusrc1, pugtlusrs1, sacrlusrc1, usnkluscr2, usnkluscr3) already were in the cycle 1 file. The boundaries did not change from cycle 1.
Went back and added areas to the cycle 2 file for all cycle 2 resampled studies that did not change from cycle 1 to cycle 2. Before, these studies were listed only in the cycle 1 file.
The cycle 2 file now contains:
SUID AREA TYPE COMMENTS acad sus3_bnd new MAS acfb luscr3_bnd resampled AgLUS cycle 1 = cycle 2, but cycle 1 coverage replaced acfb luscr3_trg resampled AgLUS cycle 1 = cycle 2, but cycle 1 coverage replaced acfb sus1_bnd resampled MAS cycle 1 = cycle 2, but cycle 1 coverage replaced albe lusag1_bnd resampled AgLUS boundaries changed between cycle 1 and cycle 2 albe lusag1_trg resampled AgLUS boundaries changed between cycle 1 and cycle 2 albe sus7_bnd new MAS ccyk lusag2b_bnd resampled AgLUS (ccptlusag2b) lusag2b_bnd = lusor1b_bnd ccyk lusag2b_trg resampled AgLUS (ccptlusag2b) lusag2b_bnd = lusor1b_bnd ccyk lusor1b_bnd resampled AgLUS (ccptlusor1b) lusor1b_bnd = lusag2b_bnd ccyk lusor1b_trg resampled AgLUS (ccptlusor1b) lusor1b_bnd = lusag2b_bnd ccyk sus1b_bnd resampled MAS (ccptsus1b) cnbr luscr1_bnd new AgLUS cnbr luscr1_trg new AgLUS conn lusrc1_bnd new UrLUS conn lusrc1_trg new UrLUS conn sus2_bnd new MAS eiwa sus3_bnd new MAS gafl luscr1_bnd resampled AgLUS higher resolution coverage than cycle 1, cycle 1 replaced gafl luscr1_trg resampled AgLUS higher resolution coverage than cycle 1, cycle 1 replaced gafl lusrc1a_bnd new UrLUS lusrc1_bnd = lusrc1a_bnd = lusrc1b_bnd gafl lusrc1a_trg new UrLUS lusrc1_trg = lusrc1a_trg = lusrc1b_trg gafl lusrc1b_bnd new UrLUS lusrc1_bnd = lusrc1a_bnd = lusrc1b_bnd gafl lusrc1b_trg new UrLUS lusrc1_trg = lusrc1a_trg = lusrc1b_trg gafl sus2_bnd new MAS gafl sus3_bnd new MAS linj lusrc1_bnd resampled UrLUS linj lusrc1_trg resampled UrLUS lirb lusrc1_bnd new UrLUS lirb lusrc1_trg new UrLUS nvbr lusrc1_bnd new UrLUS nvbr lusrc1_trg new UrLUS nvbr sus2_bnd resampled MAS boundaries changed between cycle 1 and cycle 2 nvbr sus4_bnd new MAS podl lusag1_bnd resampled AgLUS (potolusag1) podl lusag1_trg resampled AgLUS (potolusag1) podl luscr1_bnd resampled AgLUS (dlmvluscr1) luscr1_bnd = sus1_bnd podl luscr1_trg resampled AgLUS (dlmvluscr1) luscr1_bnd = sus1_bnd podl lusrc1_bnd new UrLUS podl lusrc1_trg new UrLUS podl sus1_bnd resampled MAS (dlmvsus1) podl sus2_bnd new MAS pugt lusrs1_bnd resampled UrLUS pugt lusrs1_trg resampled UrLUS sacr lusrc1_bnd resampled UrLUS sacr lusrc1_trg resampled UrLUS sanj luscr1a_bnd resampled AgLUS luscr1a_bnd = lusor1a_bnd = lusor2a_bnd = sus1_bnd sanj luscr1a_trg resampled AgLUS boundaries changed between c1 and c2; also, c1 boundary replaced sanj lusor1a_bnd resampled AgLUS luscr1a_bnd = lusor1a_bnd = lusor2a_bnd = sus1_bnd sanj lusor1a_trg resampled AgLUS cycle 1 = cycle 2, but cycle 1 boundary replaced sanj lusor2a_bnd resampled AgLUS luscr1a_bnd = lusor1a_bnd = lusor2a_bnd = sus1_bnd sanj lusor2a_trg resampled AgLUS boundaries changed between c1 and c2; also, c1 boundary replaced sanj sus1_bnd resampled MAS luscr1a_bnd = lusor1a_bnd = lusor2a_bnd = sus1_bnd splt luscr1_bnd resampled AgLUS splt luscr1_trg resampled AgLUS splt luscr2_bnd new AgLUS splt luscr2_trg new AgLUS splt lusrc2_bnd new UrLUS splt lusrc2_trg new UrLUS trin lusrc1_bnd new UrLUS trin lusrc1_trg new UrLUS trin sus3_bnd resampled MAS boundaries changed between cycle 1 and cycle 2 trin sus4_bnd new MAS usnk luscr2_bnd resampled AgLUS usnk luscr2_trg resampled AgLUS usnk luscr3_bnd resampled AgLUS usnk luscr3_trg resampled AgLUS whmi luscr1_bnd resampled AgLUS (whitluscr1) whmi luscr1_trg resampled AgLUS (whitluscr1) will lusag3_bnd resampled AgLUS same as cycle 1 lusag2_bnd will lusag3_trg resampled AgLUS same as cycle 1 lusag2_trg wmic lusag2_bnd resampled AgLUS wmic lusag2_trg resampled AgLUS wmic sus1_bnd resampled MAS wmic sus2_bnd new MAS
The data set is referenced by SUCODE (NAWQA study unit/network code) and AREAID (ground water study boundary coverage). Two kinds of ground water network polygon coverages exist: 1) BND coverages, which represent the entire areal extent of the hydrogeologic unit defined for study, and 2) TRG coverages, which delineate the targeted land use within the BND.
The data set is organized by SUCODE and AREAID.
The fields are:
SUID NAWQA study unit
SUCODE NAWQA study unit/network code
AREAID Ground water boundary coverage
POLYAREAM2 Total area of ground water study,
based on polygons (square meters)
GRIDAREAM2 Total area of ground water study,
based on grid cells (square meters)
DIFF_POLY_GRID (POLYAREAM2 minus GRIDAREAM2) / GRIDAREAM2, used as a quick
check to see if the areas are in the same ballpark
kjhitt@usgs.gov
kjhitt@usgs.gov