Simulating the Effects of Deficit Irrigation for Furrow Systems

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by J. M. Enciso, Univ of Nebraska, Lincoln, United States,
D. L. Martin, Univ of Nebraska, Lincoln, United States,
D. E. Eisenhauer, Univ of Nebraska, Lincoln, United States,
N. L. Klocke, Univ of Nebraska, Lincoln, United States,

Document Type: Proceeding Paper

Part of: Irrigation and Drainage: Saving a Threatened Resource—In Search of Solutions

Abstract: The distribution of irrigation water across a field can dramatically affects management of furrow irrigation systems as water supplies become limiting. To assess management strategies for deficit irrigation with a furrow system we used a set of simulation models to determine the average corn yield for the field. We combined an infiltration model, a surface irrigation model and a crop model (CERES-MAIZE) to predict the yield along and across the field. A two dimensional Green and Ampt infiltration model was developed to simulate infiltration changes due to soil water content and soil cracking. A case study for western Nebraska for a Cozad silt loam soil was used to illustrate development of production functions resulting from management strategies for a limited irrigation water supply.

Subject Headings: Irrigation systems | Water supply systems | Simulation models | Hydrologic models | Irrigation water | Furrow irrigation | Water conservation | Soil water | Nebraska | North America | United States

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