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Last modified
4/17/2013 9:38:02 AM
Creation date
5/27/2008 11:42:45 AM
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Decision Support Systems
Title
SPDSS Task 71 - Estimate Historical Acreage
Description
This memorandum presents the general approach and results from the completion of the following: Determine an appropriate method for using agricultural statistics, water rights, water availability, and other data to estimate historic irrigated acreage and crop types by ditch or other water source for the entire SPDSS study period (e.g. time periods before and between GIS irrigated acreage coverages).
Decision Support - Doc Type
Task Memorandum
Date
3/21/2007
DSS Category
Consumptive Use
DSS
South Platte
Basin
South Platte
Contract/PO #
C153954
Grant Type
Non-Reimbursable
Bill Number
SB01-157, HB02-1152, SB03-110, HB04-1221, SB05-084, HB06-1313, SB07-122
Prepared By
Leonard Rice Engineering
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SPDSS_Task71_EstimateHistoricalAcreage
Last modified:
4/17/2013 9:38:02 AM
Path:
\Decision Support Systems\DayForward
Comments:
2007 Revision
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Figure 3. Irrigated Acres -Logan County <br />Logan County Acreage Comparison <br />200000 <br />150000 <br />a~i <br />~ 100000 <br />a <br />50000 <br />0 <br />~O ~3 ~~° ~O ro`l' O~ 00 'l'~ 1~ 'l'l 00 03 00 00 O`l' O~ 00 O~ Off` <br />~O ~O ~O ~O ~O ~O ~O ~O ~O ~O ~O ~O ~O ~O ~O ~O ~O 00 00 <br />tAg Stats -GIS by Ditch GIS by Location <br />Figure 4. Irrigated Acres -Sedgewick County <br />Sedgewick County Acreage Comparison <br />100000 1 <br />soooo <br />~ 60000 <br />Q 40000 <br />20000 <br />0 <br />t Ag Stats -^-GIS by Ditch GIS by Location <br />AgStats also provides an opportunity to look at changes in irrigated acreage by crop type <br />at the county level over the 1950 to 2005 time period. Figure 5 shows AgStat trends in <br />irrigated acres of corn, beans, grains, sugar beets, alfalfa and pasture. Basin wide, <br />irrigated acres of corn can vary greatly between years while most of the other crop types <br />remain relatively constant over time. Some counties, like Weld (Figure 6), are similar to <br />the basin wide trends in crop type variability while other counties, like Boulder (Figure 7) <br />and Adams (Figure 8), exhibit a great deal of variability in all crop types between years. <br />There does not appear to be consistent crop type patterns between counties. <br />Page 3 of 11 <br />
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