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The MSU Sprinkling Infiltrometer: A Device to Measure Time-to-Ponding

by Patricia A. Crowley, Michigan State Univ, United States,
Andrew H. Granskog, Michigan State Univ, United States,
George E. Merva, Michigan State Univ, United States,



Document Type: Proceeding Paper

Part of: National Water Conference

Abstract:

Time-to-ponding can be determined quickly and with minimal disturbance to the soil surface by the use of a sprinking infiltrometer developed at Michigan State University (MSU). Solenoid valves controlling each of six nozzles mounted on a horizontal boom approximately 1 m above the ground surface are used to produce constant but selectable water application rates ranging from about 10 to 75 mm/h. Each nozzle delivers water over a 1 m diameter site with a coefficient of uniformity greater than 85%. Water is applied until surface ponding covering an area approximately 25 mm in diameter is observed. Log-log regression analysis is used to model the time-to-ponding (infiltration) curve from which the predicted application rates that would just result in ponding after 60 minutes of irrigation are predicted for various tillage, soil, and machine traffic conditions.

Subject Headings: Traffic models | Irrigation | Infiltration | Traffic analysis | Soil analysis | Regression analysis | Mathematical models

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