Furrow Modeling with Variable Hydraulic Characteristics

by L. J. Schwankl, Univ of California Cooperative, Extension, Davis, CA, USA,
W. W. Wallender, Univ of California Cooperative, Extension, Davis, CA, USA,



Abstract: A zero inertia furrow irrigation model was developed to run on an IBM-compatible micro-computer. The depth gradient term of the momentum equation is approximated by averaging over the wetted length of furrow, thus simplifying the simulation. Model simulation at predetermined space increments rather than at specified time increments was utilized. Spatially-varying infiltration and temporally-and spatially-varying wetted perimeter effects on furrow advance and infiltrated water distribution were investigated.

Subject Headings: Hydraulic models | Infiltration | Channel flow | Water flow | Soil analysis | Permeability (soil) | Inertia | Furrow irrigation

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