Evaluation of models for estimating surface irrigation infiltration parameters : Data protocols and algorithm performance Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/x346d713z

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  • Often furrow irrigation application efficiencies are low compared to sprinkler systems. The primary goal of furrow irrigation is to infiltrate a relatively uniform target depth of water necessary for the crop, while minimizing the amount of runoff. The concept is difficult because water can infiltrate differently at all locations in a field and from one irrigation to the next. Computer modeling programs are commonly used to simulate furrow irrigation events. Simulations permit fine-tuning of management strategies before making labor intensive adjustments in the field. These computer programs require field data inputs so that the characteristics of the simulation closely match the field condition. The most important inputs are the infiltration characteristic parameters, but unfortunately the parameters are commonly quantified incorrectly. Methods used to estimate infiltration parameters are available. The dilemma is knowing which method to use, what data to use, and which will produce the most accurate results. The Bioengineering Department at Oregon State University collaborated with the EWRI, ASCE Task Committee on Soil and Crop Hydraulic Properties to explore the capabilities of five different infiltration parameter estimation methods.
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