Soils in the southern part of Whiteside County are commonly sandy and require irrigation, for which the Sankoty Aquifer is the primary water source. The Sankoty Aquifer occupies the ancestral Mississippi River Valley, which underlies the southern half of Whiteside County, and can provide the amount of groundwater necessary to sustain high capacity wells that are capable of pumping well over 1,000 gallons per minute. This map displays the center pivot irrigation systems in use in Whiteside County, Illinois during the 2012 growing season. Center pivot irrigation imprints identifiable circular patterns on the landscape which can be visible in aerial images. The USDA collects aerial images (National Agricultural Imagery Program) and makes them available through the USDA Geospatial Data Gateway. The NAIP images were examined for circular irrigation patterns, and field boundaries were digitized using ArcGIS version 10.0 to create a map layer. In total, 606 fields were identified as using center pivot systems in Whiteside County during the summer of 2012, representing 60,122 acres of farmland and approximately 15 percent of all farmland in this county. This map is available online as a 36" x 26" PDF file (7.4MB).
|Original language||English (US)|
|Publisher||Illinois State Water Survey|
|State||Published - Aug 1 2014|