Constant rate rainfall infiltration: A versatile nonlinear model: 2. Applications of solutions

摘要: In paper 1 (Broadbridge and White, this issue) an analytical nonlinear model for constant rate rainfall infiltration was proposed which promised considerable versatility. it a wide range of soil hydraulic properties are generated through the variation single free parameter C. Here three techniques advanced determining parameter. The first, one-dimensional technique, involves simultaneous determination sorptivity wetting front position. second uses measured values surface water content at long times rates less than saturated conductivity. third, three- flow on same sample. All suitable field applications. practical C parameter, variety repacked in situ soils, is found to be restricted between 2. conductivities diffusivities general agreement with independent measurements. Its moisture characteristics ψ(θ), not matched any way characteristics, follow closely those observed. Also, permits predictions dependence antecedent given measurement sorptivity. analytic solutions flux describe satisfactorily evolution profiles pressure potential laboratory without posteriori adjustments. mathematically simple, traveling wave approximation agrees well observations comparatively short times. Finally, ponding predicted by model's expression.