We model drainage flow by assuming gravitational regime. Central for the present paper is a fairly general analytical solution which is applicable to local (typically laboratory) scale. These results are then specified by adopting the Brooks et al (1964) model for the hydraulic conductivity curve. At field scale, we combine our analytical results with the stream tube model of Dagan et al (1979) to derive the ensemble average of the effective saturation. This is achieved by regarding the parameters of hydraulic properties as random space functions (RSFs) with given joint density distribution. For illustration purposes, we show how the spatial variability of the saturated conductivity Ks impacts the effective saturation.
Local and Field Scale Model for Vertical Drainage Flow / Comegna, Alessandro; Severino, Gerardo; Sommella, Angelo. - STAMPA. - (2004), pp. 101-106. (Intervento presentato al convegno Saturated and Unsaturated Zone: integration of process knowledge into effective models tenutosi a Roma nel 5-7 maggio).
Local and Field Scale Model for Vertical Drainage Flow
COMEGNA, ALESSANDRO;SEVERINO, GERARDO;SOMMELLA, ANGELO
2004
Abstract
We model drainage flow by assuming gravitational regime. Central for the present paper is a fairly general analytical solution which is applicable to local (typically laboratory) scale. These results are then specified by adopting the Brooks et al (1964) model for the hydraulic conductivity curve. At field scale, we combine our analytical results with the stream tube model of Dagan et al (1979) to derive the ensemble average of the effective saturation. This is achieved by regarding the parameters of hydraulic properties as random space functions (RSFs) with given joint density distribution. For illustration purposes, we show how the spatial variability of the saturated conductivity Ks impacts the effective saturation.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
