Developing a three-dimensional coupled model of pipe-matrix subsurface flow
October 13th, 2008
Hyunuk An, Yutaka Ichikawa, Yasuto Tachikawa and Michiharu Shiiba
Release Date: October 13, 2008
Developing a three-dimensional coupled model of pipe-matrix subsurface flow
Hyunuk An1), Yutaka Ichikawa1), Yasuto Tachikawa1) and Michiharu Shiiba1)
1) Graduate School of Engineering, Kyoto University
(Received: March 21, 2008)
(Accepted for publication: August 11, 2008)
Abstract:
Over the past two decades, many studies have reported the presence of soil pipes in hillslopes and their significant influence on rainfall-runoff processes. To analyze pipe flow mechanisms which have complex flow dynamics and interaction with water in the surrounding soil, this study proposed a numerical simulation model which combined a slot model with a three-dimensional saturated-unsaturated subsurface flow model. Soil matrix flow and pipe flow were regarded as separate flow systems and calculated using the individual governing equations, which are Richards equation and the dynamic flow equation. To validate the model, the simulations were conducted for three different conditions (no pipe, open pipe and closed pipe) and showed good agreement with experimental observation data.
To cite this article:
Hyunuk An, Yutaka Ichikawa, Yasuto Tachikawa and Michiharu Shiiba: “Developing a three-dimensional coupled model of pipe-matrix subsurface flow”, Hydrological Research Letters, Vol. 2, pp.52-55, (2008) .
doi:10.3178/hrl.2.52
JOI JST.JSTAGE/hrl/2.52
Copyright (c) 2008 Japan Society of Hydrology and Water Resources