NAWQA GIS ancillary data: 1992 and 1997 NRI characteristics (waste management, irrigation canal or lateral, conservation tillage, contour farming, irrigation ditch and canal, irrigation pipeline, irrigation tailwater recovery, irrigation water management, irrigation land leveling, terrace, subsurface drain, surface drainage, irrigation source, and irrigation type) for ground water study areas (Land Use Studies and Subunit Surveys)

Metadata also available as - [Parseable text]

Metadata:

Identification_Information:

Citation:
Citation_Information:
Originator: Hitt, Kerie J.
Publication_Date: 200504
Title:
NAWQA GIS ancillary data: 1992 and 1997 NRI characteristics (waste management, irrigation canal or lateral, conservation tillage, contour farming, irrigation ditch and canal, irrigation pipeline, irrigation tailwater recovery, irrigation water management, irrigation land leveling, terrace, subsurface drain, surface drainage, irrigation source, and irrigation type) 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 1992 and 1997 NRI data on selected conservation practices, irrigation sources, and irrigation types for NAWQA ground water study areas (Land Use Studies and Subunit Surveys). NRI characteristics were prepared by Michael Wieczorek.

The NRI was conducted every 5 years from 1977 to 1997, but is now conducted annually. The NRI web site <URL:http://www.nrcs.usda.gov/technical/nri/1997/obtain_data.html> states: 

NRI data for four points in time (1982, 1987, 1992, and 1997)
are completely comparable and consistent from year to year so
that the data reflect true trends and temporal analyses can be
made. When making comparisons with 1982, 1987, and/or 1992 data,
the 1997 NRI database must be used. Originally released 1982,
1987, and 1992 data may not be consistent with the new
database. The historical 1982, 1987, and 1992 data were updated
to reflect 1997 technical criteria and protocols as part of the
1997 NRI inventory process. The 1997 NRI database should be
considered self-contained in that respect. The 1992 dataset is
no longer being supported.
The following NRI elements were compiled for NAWQA: 

NRI                                                Data
Code  Description                                  Availability
---------------------------------------------------------------
      CONSERVATION PRACTICES
312   Waste management system                        ** 92 only **
320   Irrigation, canal or lateral                   ** 92 only **
329   Conservation tillage system                    ** 92 only **
330   Contour Farming                                92, 97
428   Irrigation water conveyance, ditch and canal   ** 92 only **
430   Irrigation water conveyance, pipeline          ** 92 only **
447   Irrigation system, tailwater recovery          92, 97
449   Irrigation water management                    ** 92 only **
464   Irrigation land leveling                       ** 92 only **
600   Terrace                                        92, 97
606   Subsurface drain                               ** 92 only **
607   Surface drainage, field ditch                  92, 97
608   Surface drainage, main or lateral              92, 97

      IRRIGATION SOURCES

0     No irrigation source                           92, 97
1     Well                                           92, 97
2     Pond, lake, or reservoir                       92, 97
3     Stream, ditch, or canal                        92, 97
4     Lagoon or other waste water                    92, 97
      (not including tailwater recovery)
5     Combination                                    92, 97

      IRRIGATION TYPES
0     Not irrigated                                  92, 97
1     Gravity irrigated                              92, 97
2     Pressure irrigated                             92, 97
3     Gravity and pressure irrigated                 92, 97
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 input data set did not include Alaska and Hawaii.

Time_Period_of_Content:
Time_Period_Information:
Multiple_Dates/Times:
Single_Date/Time:
Calendar_Date: 1992
Single_Date/Time:
Calendar_Date: 1997

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: NRI
Theme_Keyword: National Resources Inventory
Theme_Keyword: Conservation practice
Theme_Keyword: Animal waste management
Theme_Keyword: Irrigation, canal or lateral
Theme_Keyword: Conservation tillage system
Theme_Keyword: Contour Farming
Theme_Keyword: Irrigation water conveyance, ditch and canal
Theme_Keyword: Irrigation water conveyance, pipeline
Theme_Keyword: Irrigation system, tailwater recovery
Theme_Keyword: Irrigation water management
Theme_Keyword: Irrigation land leveling
Theme_Keyword: Terrace
Theme_Keyword: Subsurface drain
Theme_Keyword: Surface drainage, field ditch
Theme_Keyword: Surface drainage, main or lateral
Theme_Keyword: Well irrigation source
Theme_Keyword: Pond, lake, or reservoir irrigation source
Theme_Keyword: Stream, ditch, or canal irrigation source
Theme_Keyword: Lagoon or other waste water irrigation source
Theme_Keyword: Gravity irrigation
Theme_Keyword: Pressure irrigation
Theme_Keyword: Gravity and pressure irrigation
Theme_Keyword: Artificial drainage
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: Wieczorek, M.
Publication_Date: 200404
Title: 1992 and 1997 Natural Resources Inventory acres by county
Online_Linkage: <URL:http://md-internal.er.usgs.gov/gis/nsynth/nrinlcd.htm>
Source_Scale_Denominator: 500,000
Type_of_Source_Media: On line
Source_Time_Period_of_Content:
Time_Period_Information:
Multiple_Dates/Times:
Single_Date/Time:
Calendar_Date: 1992
Single_Date/Time:
Calendar_Date: 1997
Source_Currentness_Reference: Publication date
Source_Citation_Abbreviation: NRI grids
Source_Contribution:
Tables of data showing acres of each NRI practice by county.

We are assuming NRI is the "truth" for practice and enhanced National Land Cover Data (NLCDE) is the "truth" for land use. The county coefficient for NRI practice multiplied by the area of NLCDE land use in the county gives the total area of that practice in the county.

1. Calculate a county coefficient for each NRI practice: 

total area of NRI practice on                total area of NRI
agricultural land (cropland,     divided     agricultural land
pasture/hay, and orchards)       by          in the county
in the county
2. Calculate area of NLCDE agricultural land in the county using 30-m NLCDE grids.

3. Calculate the area of NRI practice apportioned to NLCDE land use in the county: 

NRI coefficient    *    NLCDE agricultural land area
for county              for county
Source_Information:
Source_Citation:
Citation_Information:
Originator: Natural Resources Conservation Service
Publication_Date: 2001
Title: 1997 National Resources Inventory
Online_Linkage:
<URL:http://www.nrcs.usda.gov/technical/nri/1997/obtain_data.html>
Source_Scale_Denominator: 500,000
Type_of_Source_Media: On line
Source_Time_Period_of_Content:
Time_Period_Information:
Multiple_Dates/Times:
Single_Date/Time:
Calendar_Date: 1992
Single_Date/Time:
Calendar_Date: 1997
Source_Currentness_Reference: Publication date
Source_Citation_Abbreviation: 1997 NRI
Source_Contribution:
This is the source of the data on NRI practices that is aggregated by county and then apportioned to NLCDE land use. The 1997 NRI contains 1997 data as well as historical data for 1982, 1987, and 1992 that were updated to reflect 1997 technical criteria.

Process_Step:
Process_Date: 20040601
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 NRI 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 the area of each NRI variable in the ground water study.

The area of each NRI variable in the ground water study is calculated by multiplying the total area of the NRI variable in a county by the fraction of all agricultural land in that county in the ground water study and summing the areas 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 ucollusrc1b_trg, which contains one county: 

GWBNDC1_FIPSLU.AWT

FIPS         NLCDE      AREAKM2          ALLAG6           ALLAG6_KM2
08051        81         0.95400000       0.00616813       154.66590000
08051        82         0.07290000       0.00047134       154.66590000
ALLAG6 is the fraction of the total ag land in the county that is in the ground water study. 

(ALLAG6 = AREAKM2 / ALLAG6_KM2)
According to the NRI table, county 08051 has a total of 249.2890 km2 of IS03 (irrigation source = stream, ditch, or canal). 

NRI92-CPRACSKM2.DAT

FIPS         IS03 KM2
08051       249.28904000
The total area of NRI IS03 in the ground water study is calculated as fraction of total agland in the county in the ground water study * total area of NRI practice in the county (applies only to agland categories in ground water study): 

ALLAG6 * IS03 for NLCDE 81  +  ALLAG6 * IS03 for NLCDE 82 =
0.00616813 * 249.28904      +  0.00047134 * 249.28904     =
1.5376145                   +  0.1174899                  =
1.6551 km2 of IS03 in ground water study
A limitation of this procedure may occur when the amount of county ag land from NRI differs substantially from the amount of county ag land from NLCDE. If NRI ag land is more than NLCDE ag land, sometimes calculated areas of NRI practices in a ground water study are more than the total NLCDE ag land calculated in the ground water study. In fact, sometimes the calculated areas of NRI practices in a ground water study are more than the entire area of the ground water study.

For example, calculated area of 1992 NRI IT01 exceeds 114.7 km2 total area for ground water study rioglusag1_trg: 

TOTAL AREA OF
rioglusag1_trg   IT01
 114.734 km2     118.9 km2
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 NRI areas calculated for counties 35013 and 35051 show: 

FIPS        IT01 km2
35013       644.67117000  ** --- 644 km2 of NRI practice exceeds
                                 269 km2 of NLCDE ag land in
                                     gw study area from county 35013
35051        45.72997000  *** --- 46 km2 of NRI practice exceeds
                                  25 km2 of NLCDE ag land in
                                     gw study area from county 35051
The area of IT01 in the ground water study is calculated as the sum of ALLAG6 * IT01 for each ag land class in each county: 

FIPS    NLCDE    AREAKM2   ALLAG6      *   IT01
35013     61      1.5975   0.00593691    644.67  =   3.82735536
35013     62      1.1223   0.00417089    644.67  =   2.68885254
35013     81      8.3916   0.03118634    644.67  =  20.10493430
35013     82     29.8944   0.11109880    644.67  =  71.62219338
35013     84      0.0306   0.00011372    644.67  =   0.07331271
35051     62      0.3357   0.01343031     45.73  =   0.61416767
35051     81      1.8441   0.07377668     45.73  =   3.37380536
35051     82      8.9802   0.35926980     45.73  =  16.42939718
35051     84      0.0738   0.00295251     45.73  =   0.13501810
                ________                          ______________
                 52.3 km2                         118.9 km2 of IT01 in gw study
                 of ag land                         (but NLCDE shows only 52.3 km2 of
                 in gw study                        ag land in the ground water study and
                                                    total area of ground water study
                                                    is only 114.7 km2)
Data users must adjust for this. One strategy is to assume that all of the ag land in a ground water study is associated with an NRI practice if the calculated area of the NRI practice in the ground water study exceeds the calculated NLCDE ag land for the ground water study.

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

&r weightstats gwbndc1_fipslu.awt d:/ancill/nri/nri92-cpracskm2.dat gwbndc1_nri92.dat sum areaid allag6 countyg fipsb ~
  is01 is02 is03 is04 is05 it01 it02 it03 ~
  cp312 cp320 cp329 cp330 cp428 cp430 cp447 cp449 cp464 cp600 cp606 cp607 cp608
Process_Step:
Process_Date: 20040722
Process_Description:
Received new boundary for cycle 1 SANJLUSOR1A_TRG, SANJLUSOR1B_TRG. Recalculated NRI data for these areas.

Process_Step:
Process_Date: 20041020
Process_Description:
Updated metadata to clarify the value of zero is not missing data, but is valid. Missing data is indicated by -9999. None of the ground water study areas should have missing values, but some will have zero values.

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. Each NRI variable represents the sum of the area (km2) for that NRI practice for the study area. Values of zero are possible. No missing values should occur because if an NRI practice does not occur in a county, the area assigned to the practice is zero.

The fields for 1992 NRI characteristics are: 

AREAID   Ground water boundary coverage
SUID     NAWQA study unit
SUCODE   NAWQA study unit/network code

         IRRIGATION SOURCE
IS01     Well (KM2)
IS02	Pond, lake, or reservoir (KM2)
IS03	Stream, ditch, or canal (KM2)
IS04	Lagoon or other waste water (KM2)
IS05	Combination (KM2)

         IRRIGATION TYPE
IT01     Gravity irrigated (KM2)
IT02	Pressure irrigated (KM2)
IT03	Gravity and pressure irrigated (KM2)

         CONSERVATION PRACTICE
CP312	Waste management system (KM2)
CP320	Irrigation, canal or lateral (KM2)
CP329	Conservation tillage system  (KM2)
CP330	Contour Farming (KM2)
CP428	Irrigation water conveyance, ditch and canal (KM2)
CP430	Irrigation water conveyance, pipeline (KM2)
CP447	Irrigation system, tailwater recovery (KM2)
CP449	Irrigation water management (KM2)
CP464	Irrigation land leveling (KM2)
CP600	Terrace (KM2)
CP606	Subsurface drain (KM2)
CP607	Surface drainage, field ditch (KM2)
CP608	Surface drainage, main or lateral (KM2)
The fields for 1997 NRI characteristics are: 

AREAID   NAWQA station id
IS01     Well (KM2)
IS02	Pond, lake, or reservoir (KM2)
IS03	Stream, ditch, or canal (KM2)
IS04	Lagoon or other waste water (KM2)
IS05	Combination (KM2)
IT01     Gravity irrigated (KM2)
IT02	Pressure irrigated (KM2)
IT03	Gravity and pressure irrigated (KM2)
CP330	Contour Farming (KM2)
CP447    Irrigation system, tailwater recovery (KM2)
CP600    Terrace (KM2)
CP607    Surface drainage, field ditch (KM2)
CP608    Surface drainage, main or lateral (KM2)
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

Generated by mp version 2.8.17 on Wed Jun 22 15:22:36 2005