Evaluation of Basin Inflow Cutoff Criterion in the Irrigation Districts of Southwest Arizona
Publication: World Environmental and Water Resources Congress 2008: Ahupua'A
Abstract
Low irrigation efficiencies persist in irrigated areas near Yuma, Arizona due to poorly designed irrigation systems, poor condition of existing systems, inaccurate delivery of flow rates, and inadequate criteria for determining irrigation cutoff to individual basins. In farms where growers lack adequate control over the water supplied to individual basins, conventional irrigation cutoff criteria, based on precise measurement of inflow rates, are ineffective. A joint research project, involving the USDA-ARS-ALARC, University of Arizona, and the USBR, is exploring the management of these systems using the time of advance to half the field length as a criterion for cutoff when inflow rates are not know accurately. Preliminary simulation studies have shown the potential benefits and limitations of such a strategy. This strategy is being tested in the field, to assess its sensitivity to uncertain system properties. This article describes the general research methodology and some of the initial simulation and field results.
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Copyright
© 2008 American Society of Civil Engineers.
History
Published online: Apr 26, 2012
ASCE Technical Topics:
- Basins
- Bodies of water (by type)
- Design (by type)
- Engineering fundamentals
- Flow (fluid dynamics)
- Flow rates
- Fluid dynamics
- Fluid mechanics
- Hydraulic design
- Hydrologic engineering
- Inflow
- Irrigation
- Irrigation districts
- Irrigation engineering
- Irrigation systems
- River engineering
- Rivers and streams
- Surface irrigation
- Systems engineering
- Systems management
- Water and water resources
- Water management
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