Title |
Lower Colorado Region Comprehensive Framework Study: Main Report 1971 |
Creator |
Lower Colorado Region State-Federal Interagency Group; Pacific Southwest Inter-agency Committee |
Subject |
Water resources development; Water |
Spatial Coverage |
Arizona; Utah; Nevada |
OCR Text |
Show This report presents the results of comprehensive investigations of water and related land resources of the Lower Colorado Region. |
Publisher |
[Washington : U.S. Govt. Print. Off.], 1971. |
Date |
1971 |
Type |
Text |
Format |
application/pdf |
Digitization Specifications |
Pages were scanned at 400 ppi on Fujitsu fi-5650C sheetfed scanner as 8-bit grayscale or 24-bit RGB uncompressed TIFF images. For ContentDM access the images were resampled to 750 pixels wide and 120 dpi and saved as JPEG (level 8) in PhotoShop CS with Unsharp Mask of 100/.3. Foldout pages larger than 11" x 14" were captured using a BetterLight Super 8K-2 digital camera back on a 4x5 view camera (100mm Schneider APO lens). Oversize images were resampled to 1500 pixels wide. Optical Character Recognition (OCR) by ABBYY FineReader 7.0 with manual review. |
Resource Identifier |
http://content.lib.utah.edu/cgi-bin/docviewer.exe?CISOROOT=/wwdl-doc&CISOPTR=4079 |
Language |
eng |
Relation |
Western Waters Digital Library |
Rights Management |
Digital Image Copyright 2004, University of Utah. All Rights Reserved. |
Contributing Institution |
S.J. Quinney Law Library, 332 South 1400 East, Salt Lake City, UT 84112-0730 |
Source Physical Dimensions |
20.5cm x 28cm |
Scanning Technician |
Backstage Library Works, 1180 S. 800 E., Orem, UT 84097 |
Call Number |
GovDoc: Y3.P11/2:2C71; LC: TC425.C6 |
ARK |
ark:/87278/s6t152zk |
Setname |
wwdl_documents |
ID |
1135029 |
Reference URL |
https://collections.lib.utah.edu/ark:/87278/s6t152zk |
Title |
UUM_LowerColoMain_page_078 |
OCR Text |
Show IRRIGATION AND DRAINAGE The Lower Colorado Region has over 36 million acres suitable for irrigated agriculture of which only about 5 percent is projected to be utilized for crop production. Projections indicate that about 20^,000 acres of land presently developed for irrigation will be converted to urban development by the year 2020. To compensate for this loss of irrigated acreage and to provide a net increase of 298,000 acres of irrigated land, about 502,000 acres of new irrigation development need to be accomplished before the year 2020. Expected new land development for irrigation during the study period would include: lands in ik Indian reserva- tions, in authorized projects in Utah, and private development in outlying ground-water basins. Other needs include installation of onfarm irrigation water manage- ment practices and measures, rehabilitation of existing distribution systems, drainage development, and development of new distribution sys- tems on both existing irrigated land and new irrigated land. Each contract under which water is provided by the Central Arizona Project must require that the canals and distribution systems through which water is conveyed be maintained with linings adequate to prevent exces- sive conveyance losses. Table 7 shows the total required irrigation development and net increases by time frame. Lining of distribution ditches is necessary for increased efficiency of irrigation water use. |
Format |
application/pdf |
Resource Identifier |
130_UUM_LowerColoMain_page_078.jpg |
Source |
Original Book: Lower Colorado Region Comprehensive Framework Study Main Report 1971 |
Setname |
wwdl_documents |
ID |
1134923 |
Reference URL |
https://collections.lib.utah.edu/ark:/87278/s6t152zk/1134923 |