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#  DATASET_NAME: nebraska.txt	
#  DATASET_DESCRIPTION:	Text file describing the analysis process, sorted by state.
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#  REPORT TITLE: 
#     Estimated Withdrawals from Stream-Valley Aquifers and Refined 
#     Estimated Withdrawals from Selected Aquifers in the United 
#     States, 2000
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#  REPORT SERIES/NUMBER: Scientific Investigations Report 2008-5003 
#  REPORT URL: URL: http://pubs.er.usgs.gov/usgspubs/sir/sir20085003
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#  NAWQA STUDY:	Alluvial Aquifers
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#  METADATA DATE:   August 28, 2008 
#  METADATA CONTACT: Pierre Sargent, Molly Maupin, Stephen Hinkl
#                    U.S. Geological Survey
#                    3535 South Sherwood Forest Blvd., Suite 120
#                    Baton Rouge, LA 70816
#	 	     
#                    voice: 225-298-5481 x 3211
#                    fax:   225-298-5490
#                    email: psargent@usgs.gov
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#  SECONDARY CONTACT:  Molly Maupin
#                      U.S. Geological Survey
#                      230 Collins Road
#                      Boise, ID 83702
#
#                    	voice: 208-387-1307
#                    	fax:   208-387-1372
#                    	email: mamaupin@usgs.gov
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#  TERTIARY CONTACT:   Stephen Hinkle
#                      U.S. Geological Survey
#                      2130 SW %th Ave
#                      Portland, OR 97201
#	
#                      voice: 503-251-3237
#                      fax:   503-251-3470
#                      email: srhinkle@usgs.gov
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#  METADATA Data Description:  
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#  ABSTRACT:  
#     The report authors maintained notes detailing the process that 
#     was used to do the analysis for this report. The pertinent 
#     notes were included in the appendix of the report. 
#     Some details that did not warrant publication reside 
#     in these notes. These notes are being archived in the 
#     event that they might be of use to future water-use 
#     efforts aimed at stream-valley aquifers.
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#  Basic documentation of dataset elements and history
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# Related_Spatial_and_Tabular_Data_Sets:  
#     There are related text files of notes for all 25 states/territories in this study
#     arizona.txt
#     arkansas.txt
#     colorado.txt
#     illinois.txt
#     indiana.txt
#     kansas.txt
#     kentucky.txt
#     louisiana.txt
#     missouri.txt
#     montana.txt
#     nebraska.txt
#     new_mexico.txt
#     new_york.txt
#     new_jersey.txt
#     north_dakota.txt
#     ohio.txt
#     oklahoma.txt
#     pennsylvania.txt
#     puerto_rico.txt
#     south_dakota.txt
#     tennessee.txt
#     texas.txt
#     utah.txt
#     west_virginia.txt
#     wyoming.txt
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#  METADATA Basic documentation of dataset elements:
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#     DATA DESCRIPTION: 
#         Text files describing the analysis process, one text file 
#         for each state
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#     DATA TYPES: ascii text
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#     DATA SOURCES: notes taken during data analysis and from correspondance
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#  End METADATA documentation
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NEBRASKA DOCUMENTATION 
Last Edit date: December 15, 2005

      The Nebraska Department of Health (DOH) is the source for data on public suppliers and their water sources.  Other sources of public supply information are the Nebraska Department of Water Resources, the City of Lincoln Water System and the Metropolitan Utilities District (MUD) in Omaha, Nebraska. Industrial information is provided in the Directory of Nebraska Manufactories, published by the Nebraska Department of Economic Development. Both the U.S. Department of Agricultures National Agricultural Statistics Service and the Natural Resources Conservation Service provided irrigation information. The Nebraska Department of Water Resources maintains a data base of registered well data. 
      In 2000 total water ground-water withdrawals in Nebraska was approximately 7,860 Mgal/d.  Ground-water withdrawals in the categories of public supply, self-supplied industrial, and irrigation are 7,725 Mgal/d, 98 per cent of total ground-water withdrawals.  Withdrawals from the alluvial aquifers and the Other aquifer category totaled 165.5 Mgal/d, representing 2 per cent of ground water withdrawals from the three categories. Irrigation was the source of most of the withdrawals attributed to alluvial aquifers (92.2 Mgal/d out of a total of 150 Mgal/d).  Public Supply was the major source of water assigned to the Other aquifer category (10.3 Mgal/d out of a total of 15.5 Mgal/d).
      In Nebraska, a line delineating the southern extent of Quaternary continental glaciation runs generally north-south in the eastern one-fifth of the State. Coarse-grained glacial deposits exist in this glaciated area, and for the 2000 water use compilation 202 Mgal/d was assigned to glacial sand and gravel aquifers for the three categories. Alluvial deposits in the western three-fifths of the State overly unconsolidated High Plains aquifer deposits. As the two deposits can not be differentiated, water use is assigned to the High Plains aquifer. There remains an area just west of the glaciated area, approximately one-fifth of the State where potential stream-valley aquifer withdrawals may be determined.  
      For the 2000 compilation facility information for public supply and self-supplied industrial was matched with well information. County and aquifer information was assigned to the wells using a GIS coverage and depth data. Irrigation water use estimates were obtained using a county aggregate approach. Jill Frankforther, an hydrologist with the Nebraska Water Science Center, analyzed the 2000 data and estimated the stream-valley aquifer withdrawals. Wells adjacent to rivers were identified and then well logs  were examined to determine whether the wells were screened in alluvium that is in hydraulic connection with the river. 
      Only two percent of the total withdrawals from alluvial aquifers (150 Mgal/d) were disaggregated into stream-valley aquifer withdrawals.  The greatest withdrawals are from the Big Blue stream valley-aquifer (1.67 Mgal/d) followed by the Missouri (0.94 Mgal/d). Total withdrawals from the Other aquifer were 15.5 Mgal/d and originated from a Paleozoic Erathem aquifer.   
      


