| A zero inertia furrow irrigation model was developed to run on an IBM-compatible personal computer. The depth gradient term of the momentum equation was approximated by averaging over the wetted length of the furrow, thus simplifying the solution. Model simulation at predetermined space increments rather than at specified time increments was utilized.;Spatially-varying infiltration, geometry, and roughness along with spatially- and temporally-varying wetted perimeter effects on furrow advance and application uniformity were investigated. Extensive field-gathered infiltration, geometry, roughness, and advance/recession data was collected and used to calibrate and validate the simulation model.;Model simulation was done for both a single furrow as well as on a field-wide basis. Variable furrow inflow was incorporated into the field-wide analysis. Model simulations were evaluated to determine the importance to irrigation performance of each spatially-varying model input. |
