NAWQA GIS ancillary data: 1995 irrigation water use information (withdrawals, consumptive use, conveyance losses, irrigated area, and reclaimed wastewater) for ground water study areas (Land Use Studies and Subunit Surveys).

Metadata:

• Identification_Information
• Data_Quality_Information
• Spatial_Data_Organization_Information
• Entity_and_Attribute_Information
• Distribution_Information
• Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: Hitt, Kerie J.

Publication_Date: 200504

Title:

NAWQA GIS ancillary data: 1995 irrigation water use information (withdrawals, consumptive use, conveyance losses, irrigated area, and reclaimed wastewater) for ground water study areas (Land Use Studies and Subunit Surveys).

Online_Linkage:

<URL:http://water.usgs.gov/nawqa-only/gw.html>

Description:

Abstract:

This data set consists of 1995 irrigation water use information for NAWQA ground water study areas (Land Use Studies and Subunit Surveys). The water use data was supplied by Molly Maupin.

Purpose:

This is one of the ancillary GIS data layers developed to characterize NAWQA ground water studies for national synthesis of water-quality data.

Supplemental_Information:

The water use input data set did include Alaska and Hawaii, but we do not have NLCDE for those areas (so no weighting factors are available).

Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 1995

Currentness_Reference:

The data set is intended to represent conditions for the early 1990's to late 1990's.

Status:

Progress: Complete

Maintenance_and_Update_Frequency:

NAWQA cycle 2 study areas will be added as their boundaries become available.

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -125

East_Bounding_Coordinate: -66

North_Bounding_Coordinate: 50

South_Bounding_Coordinate: 24

Keywords:

Theme:

Theme_Keyword_Thesaurus: None

Theme_Keyword: NAWQA

Theme_Keyword: National Water Quality Assessment

Theme_Keyword: Ground water

Theme_Keyword: Water quality

Theme_Keyword: Water use

Theme_Keyword: Irrigation

Theme_Keyword: Irrigated area

Theme_Keyword: Irrigation water use

Theme_Keyword: Conveyance losses

Theme_Keyword: Land use study

Theme_Keyword: Subunit survey

Theme_Keyword: Major aquifer

Access_Constraints: The data set is for internal USGS access only.

Use_Constraints: The data set is for internal USGS use only.

Data_Quality_Information:

Logical_Consistency_Report: none

Completeness_Report: none

Lineage:

Source_Information:

Source_Citation:

Citation_Information:

Originator: Hitt, K.J.

Publication_Date: 200304

Title:

Boundaries of the land use study (LUS) and subunit survey (SUS) ground-water studies conducted by the National Water-Quality Assessment (NAWQA) study units

Edition: 3

Geospatial_Data_Presentation_Form: vector digital data

Publication_Information:

Publication_Place: Reston, VA

Publisher: U.S. Geological Survey

Type_of_Source_Media: digital files

Source_Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 1991

Ending_Date: 2004

Source_Currentness_Reference: current

Source_Citation_Abbreviation: GWPOLYS

Source_Contribution:

The boundaries of the LUS and SUS ground water study areas, as submitted by the NAWQA study units.

Source_Information:

Source_Citation:

Citation_Information:

Originator: Wayne Solley

Originator: Robert Pierce

Originator: Howard Perlman

Publication_Date: 1998

Title: Estimated use of water in the United States in 1995

Series_Information:

Series_Name: U.S. Geological Survey Circular

Issue_Identification: 1200

Online_Linkage: <URL:http://water.usgs.gov/watuse/pdf1995/html/>

Source_Scale_Denominator: 500,000

Type_of_Source_Media: On line

Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 1995

Source_Currentness_Reference: Publication date

Source_Citation_Abbreviation: WU95

Source_Contribution:

Table of data showing irrigation water use data by county.

Process_Step:

Process_Date: 20040903

Process_Description:

Ground water study boundaries are gridded at 30 meters and snapped to the NLCDE. Data processing occurs at 30 meters resolution.

The sum of each irrigation water use variable was determined for the study area by running the GRID command, "zonalstats" with the sum option.

Processing routines are from the NAWQA area characterization toolbox.

The basic procedure is to calculate a sum of each water use variable in the ground water study.

The sum of each irrigation water use variable in the ground water study is calculated by multiplying the total for the irrigation water use variable in a county by the fraction of all agricultural land in that county in the ground water study and summing the values for each county in the ground water study.

Here are the weighting factors for pasture/hay and row crops for the ground water study around nvbrlusag2_trg, which contains one county:

GWBNDC1_FIPSLU.AWT

FIPS         NLCDE      AREAKM2          ALLAG6           ALLAG6_KM2
32001        81        77.81040000       0.42003190       185.24880000

ALLAG6 is the fraction of the total ag land in the county that is in the ground water study.

(ALLAG6 = AREAKM2 / ALLAG6_KM2)

The irrigation water use data for county 32001 are:

IRRWU.DAT

 Water use variable          Value
 WGWFR                       13.400 mgd
 WGWTO                       13.400 mgd
 WSWFR                      120.700 mgd
 WSWSA                        0.000 mgd
 WSWTO                      120.700 mgd
 WFRTO                      134.100 mgd
 WSATO                        0.000 mgd
 WTOTL                      134.100 mgd
 CUSFR                       91.400 mgd
 CUSSA                        0.000 mgd
 CUTOT                       91.400 mgd
 CLOSS                       38.400 mgd
 IRSPR                        7.500 thousand acres
 IRSPRKM2                    30.351 sq km
 IRMIC                        0.000 thousand acres
 IRMICKM2                     0.000 sq km
 IRSUR                       37.100 thousand acres
 IRSURKM2                   150.138 sq km
 IRTOT                       44.600 thousand acres
 IRTOTKM2                   180.490 sq km
 IRRECWW                      0.010 mgd

According to the water use table, county 32001 has a total of 180.49 km2 of IRTOTKM2 (total irrigated area).

The total irrigated area in the ground water study is calculated as fraction of total agland in the county in the ground water study * total irrigated area in the whole county (applies only to agland categories in ground water study):

ALLAG6 * IRTOTKM2 for NLCDE 81 =
0.42003190 * 180.490 =
75.81 km2 of irrigated area in ground water study

A limitation of this procedure may occur when the amount of irrigated land from the water use data base differs from the amount of county ag land from NLCDE. If irrigated area from the water use data base is more than NLCDE ag land, sometimes calculated irrigated area in a ground water study is more than the total NLCDE ag land calculated in the ground water study.

For example, calculated total irrigated area exceeds the total agricultural land area for ground water study rioglusag1_trg:

TOTAL AREA OF           CALCULATED
AGRICULTURAL LAND IN    IRRIGATED AREA IN
rioglusag1_trg          rioglusag1_trg
52.270199               61.063

County/NLCDE weighting factors for the ground water study are:

County    NLCDE         AREAKM2    ALLAG6         ALLAG6_KM2
35013     11         1.80900000    0.00000000         0.00000000
35013     21         0.07020000    0.00000000         0.00000000
35013     23         0.79740000    0.00000000         0.00000000
35013     31         0.25920000    0.00000000         0.00000000
35013     41         0.01890000    0.00000000         0.00000000
35013     51        20.09880000    0.00000000         0.00000000
35013     61         1.59750000    0.00593691       269.07930000 **
35013     62         1.12230000    0.00417089       269.07930000
35013     71        21.70620000    0.00000000         0.00000000
35013     81         8.39160000    0.03118634       269.07930000
35013     82        29.89440000    0.11109880       269.07930000
35013     84         0.03060000    0.00011372       269.07930000
35013     85         0.03060000    0.00000000         0.00000000
35051     11         0.55350000    0.00000000         0.00000000
35051     21         0.00270000    0.00000000         0.00000000
35051     23         0.16650000    0.00000000         0.00000000
35051     31         0.01260000    0.00000000         0.00000000
35051     41         0.00360000    0.00000000         0.00000000
35051     51         8.53020000    0.00000000         0.00000000
35051     62         0.33570000    0.01343031        24.99570000 ***
35051     71         8.39970000    0.00000000         0.00000000
35051     81         1.84410000    0.07377668        24.99570000
35051     82         8.98020000    0.35926980        24.99570000
35051     84         0.07380000    0.00295251        24.99570000
35051     85         0.00450000    0.00000000         0.00000000
                     __________
                     114.7 km2 total area of
                           ground water study

The total irrigated area calculated for counties 35013 and 35051 show:

FIPS        IRTOTKM2 km2
35013       292.345       ** --- 292 km2 of irrigated area exceeds
                                 269 km2 of NLCDE ag land in
                                     gw study area from county 35013
35051        36.665       *** --- 37 km2 of irrigated area exceeds
                                  25 km2 of NLCDE ag land in
                                     gw study area from county 35051

The irrigated area in the ground water study is calculated as the sum of ALLAG6 * IRTOTKM2 for each ag land class in each county:

FIPS    NLCDE    AREAKM2   ALLAG6     * IRTOTKM2
35013     61      1.5975   0.00593691    292.3   =  1.733
35013     62      1.1223   0.00417089    292.3   =  1.219
35013     81      8.3916   0.03118634    292.3   =  9.114
35013     82     29.8944   0.11109880    292.3   = 32.445
35013     84      0.0306   0.00011372    292.3   =   .0330
35051     62      0.3357   0.01343031     36.7   =   .4929
35051     81      1.8441   0.07377668     36.7   =  2.7074
35051     82      8.9802   0.35926980     36.7   = 13.1852
35051     84      0.0738   0.00295251     36.7   =   .1083
                ________                          ______________
                 52.3 km2                          61.03 km2 of irrigated area in gw study
                 of ag land                         (but NLCDE shows only 52.3 km2 of
                 in gw study                        ag land in the ground water study)

The irrigated area estimated from water use data was not compared to irrigation practices derived from NRI.

Data users must adjust accordingly for possible discrepancies in the various data sets.

Processing routines are from the NAWQA area characterization toolbox. (Example below.)

&r weightstats gwbndc1_fipslu.awt d:/ancill/watuse/wu95/irrwu.dat gwbndc1_irrwu95.dat sum areaid allag6 countyg fipsb ~
 WGWFR WGWTO WSWFR WSWSA WSWTO WFRTO WSATO WTOTL ~
 CUSFR CUSSA CUTOT CLOSS IRSPRKM2 IRMICKM2 IRSURKM2 IRTOTKM2 IRRECWW

Process_Step:

Process_Date: 20050106

Process_Description:

Corrected attribute descriptions for irrigated areas.

Process_Step:

Process_Date: 20050412

Process_Description:

Recalculated data for several cycle 2 areas. For the previous calculations, the doughnut holes in the some of the study areas had not been removed in the gridded versions of the study areas. This affects seven study areas:

with doughnuts without doughnuts cut out (correct) not cut out (incorrect) AREAID GRID AREA (M2) GRID AREA (M2) cnbrluscr1_bnd 7,044,202,800.000 7,392,941,100.000 cnbrluscr1_trg 5,706,866,700.000 6,766,256,700.000 connlusrc1_bnd 1,756,677,600.000 2,064,634,200.000 connlusrc1_trg 587,594,700.000 610,191,000.000 connsus2_bnd 6,848,918,100.000 7,617,282,300.000 nvbrlusrc1_trg 155,431,800.000 155,443,500.000 spltluscr2_trg 207,267,300.000 228,433,500.000

Also added studies that are resampled studies, but do not have the same boundaries in cycle 2 as were used in cycle 1:

albelusag1, nvbrsus2, trinsus3, sanjluscr1a, sanjlusor2a.

Also added willlusag3, which has the same boundaries as cycle 1 willlusag2.

Process_Step:

Process_Date: 20050622

Process_Description:

Replaced data for santlusrc1_bnd. The study area santlusrc1_bnd should be the same as santsus1_bnd, not the same as santsus2_bnd.

Spatial_Data_Organization_Information:

Indirect_Spatial_Reference:

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.

Entity_and_Attribute_Information:

Overview_Description:

Entity_and_Attribute_Overview:

The data set is organized by SUCODE and AREAID. The data represent the sum of the water use feature for the study area.

The fields for 1995 irrigation water use characteristics are:

SUID        NAWQA study unit
SUCODE      NAWQA study unit/network code
AREAID      Ground water boundary coverage
WGWFR       Withdrawals, total fresh ground water (Mgal/day)
WGWTO       Withdrawals, total ground water  (Mgal/day)
WSWFR       Withdrawals, total fresh surface water (Mgal/day)
WSWSA       Withdrawals, total saline surface water (Mgal/day)
WSWTO       Withdrawals, total surface water (Mgal/day)
WFRTO       Withdrawals, total fresh (Mgal/day)h
WSATO       Withdrawals, total saline (Mgal/day)
WTOTL       Withdrawals, total (Mgal/day)
CUSFR       Consumptive Use, fresh (Mgal/day)
CUSSA       Consumptive Use, saline (Mgal/day)
CUTOT       Consumptive Use Total (Mgal/day)
CLOSS       Conveyance Losses (Mgal/day)
IRSPRKM2    Irrigated area, sprinkler systems (KM2)
IRMICKM2    Irrigated area, micro-irrigation systems (KM2)
IRSURKM2    Irrigated area, surface (flood) systems (KM2)
IRTOTKM2    Irrigated area, total (KM2)
IRRECWW     Reclaimed wastewater  (Mgal/day)

Entity_and_Attribute_Detail_Citation: None

Distribution_Information:

Distributor:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Kerie Hitt

Contact_Organization: USGS NAWQA Nutrients National Synthesis

Contact_Address:

Address_Type: Mailing address

Address: 413 National Center

City: Reston

State_or_Province: VA

Postal_Code: 20192

Country: USA

Contact_Electronic_Mail_Address: kjhitt@usgs.gov

Contact_Voice_Telephone: 703 648-6854

Contact_Instructions: Contact via email

Distribution_Liability: USGS assumes no liability for the use of this data set.

Metadata_Reference_Information:

Metadata_Date: 20050622

Metadata_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Kerie Hitt

Contact_Organization: USGS NAWQA Nutrients National Synthesis

Contact_Address:

Address_Type: Mailing address

Address: 413 National Center

City: Reston

State_or_Province: VA

Postal_Code: 20192

Country: USA

Contact_Electronic_Mail_Address: kjhitt@usgs.gov

Contact_Voice_Telephone: 703 648-6854

Contact_Instructions: Contact via email

Metadata_Standard_Name: Content standards for digital geospatial metadata

Metadata_Standard_Version: FGDC-STD-001-1998