The original model proposed by [1] and W is formulated here in a more homogeneous version which is easier for applications A series of infiltration-redistribution cycles is represented on a continuous basis utilizing only a basic equation for the evolution in time of surface water content. This equation was derived through averaged forms of the mass balance equation and Darcy’s law applied for a distorted shape of the soil moisture profile whose area is a fixed fraction of a rectangle. It is used to simulate ‘actual’ profiles which are represented by a single distorted profile or, at most, by combining two of them according to the behaviour of soil moisture flux with time. A merging condition for compound profiles is also adopted. The model effectiveness was examined by comparison with numerical solutions of Richards’ equation performed using a variety of synthetic experiments with stepwise uniform flux on a fine-textured soil. The model was found to be suitable with accuracy comparable to that of the original version in spite of its reduced complexity.
Modeling of rainfall infiltration in complex storm through modified rectangular profiles
CORRADINI, Corrado;
1994
Abstract
The original model proposed by [1] and W is formulated here in a more homogeneous version which is easier for applications A series of infiltration-redistribution cycles is represented on a continuous basis utilizing only a basic equation for the evolution in time of surface water content. This equation was derived through averaged forms of the mass balance equation and Darcy’s law applied for a distorted shape of the soil moisture profile whose area is a fixed fraction of a rectangle. It is used to simulate ‘actual’ profiles which are represented by a single distorted profile or, at most, by combining two of them according to the behaviour of soil moisture flux with time. A merging condition for compound profiles is also adopted. The model effectiveness was examined by comparison with numerical solutions of Richards’ equation performed using a variety of synthetic experiments with stepwise uniform flux on a fine-textured soil. The model was found to be suitable with accuracy comparable to that of the original version in spite of its reduced complexity.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
