"The Upper Arkansas River subbasin is made up of the Arkansas River and three distinct aquifer systems. They include the Arkansas alluvial aquifer, the Ogallala-High Plains aquifer and the Dakota aquifer. The Arkansas River originates in Colorado. It flows east through Hamilton, Kearny, Finney, Gray and Ford Counties in Kansas. An appreciable quantity of Upper Arkansas River surface water originates from calls for water out of John Martin Reservoir, irrigation canal return flows in eastern Colorado and alluvial bank discharge after high flow events in the system. The Arkansas River recharges the shallow alluvial aquifer and provides irrigation water to a network of ditches and Lake McKinney. It is a temporary holding basin for irrigation."

This collection contains relevant documents, such as annual field summaries, advisory committee meeting minutes, and newsletters.

• Upper Arkansas River Field Analysis Summary (2010)
• Upper Arkansas Newsletter (2010-07)
• Upper Arkansas Newsletter (2009-05)
• Upper Arkansas River Subbasin Basin Management Team Summary of Public Meetings (1998-2002)
• Upper Arkansas River Field Analysis Summary (2009)