Hydrological Research Letters
Online ISSN : 1882-3416
ISSN-L : 1882-3416
Developing a three-dimensional coupled model of pipe-matrix subsurface flow
Hyunuk AnYutaka IchikawaYasuto TachikawaMichiharu Shiiba
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Supplementary material

2008 Volume 2 Pages 52-55


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.

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© 2008 Japan Society of Hydrology and Water Resources
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