Citation:Amarasinghe, S.R., Kunio, W., & Gamal, A., (2010). Comparison between Campbell and van Genuchten models by inverse estimation of unsaturated properties, Annual Journal of Hydraulic Engineering, Japan Society of Civil Engineers, 54: 31-36.
Date:2010
Abstract:
Inverse technique to evaluate the unsaturated hydraulic properties of soil/rock was studied using
Campbell and van Genuchten models, as the functions of the hydraulic properties. When the parameters
of these models are given, the evaporation change under the constant climate and the simple boundary
conditions can be calculated with considering the liquid and vapor flows in soil/rock. So that, the
parameters can be inversely estimated by fitting the calculated evaporation change to the measured one.
Genetic Algorithm (GA) was adapted to find the best parameters in these two models. It was found that
the parameters in those models could be well estimated by this technique and the transient evaporation
change and the moisture profile in homogeneous soil could be well simulated.