Jaramillo, Andres, authorGarcia, Luis, authorGates, Timothy, authorColorado State University, publisher2020-01-302020-01-302005https://hdl.handle.net/10217/200598http://dx.doi.org/10.25675/10217/2005982005 annual AGU hydrology days was held at Colorado State University on March 7 - March 9, 2005.Includes bibliographical references.During the 2004 growing season (May 20 – August 20), irrigation activities were monitored along the 160-mile stretch between Fowler and Holly in Colorado's Lower Arkansas Valley. Fifteen fields were monitored to evaluate ongoing water use practices with an eye toward potential improvement. Ten of the monitored fields were surface irrigated, two by center pivot sprinkler systems and two by sub-surface drip irrigation systems. Where possible, measurements of total irrigation water inflow and outflow were made. Infiltration tests were conducted, and water was sampled for salinity, phosphate, and nitrate concentrations. To carry out these activities, flumes (Cutthroat and Parshall), existent flow-meters (for sprinkler and drip systems), GPS units, conductimeters, and pressure transducers (water level sensors) were employed. As more than one growing season is required to establish an accurate baseline and understanding of the region's water use practices, the results presented in this paper are all preliminary.born digitalproceedings (reports)engCopyright and other restrictions may apply. User is responsible for compliance with all applicable laws. For information about copyright law, please see https://libguides.colostate.edu/copyright.Text