Optimization of Furrow Infiltration Parameters from Advance Times and Advance Rates

by E. Bautista, Univ of California, Davis, United States,
W. W. Wallender, Univ of California, Davis, United States,



Document Type: Proceeding Paper

Part of: Irrigation and Drainage

Abstract: Optimal design and management of surface irrigation systems requires detailed knowledge of field-wide infiltration. Evaluating infiltration parameters is difficult due to temporal and spatial variability of soil characteristics. Therefore there is a need to develop techniques for obtaining lumped parameter estimates in real time using advance measurements. This paper analyzes the potential for identifying average parameters by minimizing the sum of squared differences of measured and model predicted advance, a classical parameter identification problem. A hydrodynamic model simulated irrigation advance in which intake was assumed to vary with wetted perimeter. Computer simulated (with spatially variable infiltration) and field measured irrigation data were used to assess the reliability of results and convergence of the algorithm.

Subject Headings: Infiltration | Parameters (statistics) | Hydrologic models | Flow simulation | Open channel flow | Surface irrigation | Irrigation systems

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