WIT Press


Green-Ampt Model Of A Rain Garden And Comparison To Richards Equation Model

Price

Free (open access)

Paper DOI

10.2495/SPD030841

Volume

67

Pages

10

Published

2003

Size

441.23 kb

Author(s)

A. Dussaillant, K. Cozzetto, K. Brander & K. Potter

Abstract

Green-Ampt model of a rain garden and comparison to Richards equation model A. ~ussaillant', K. cozzetto2, K. ~rande? & K. ~otte? I Department of Hydraulic and Environmental Engineering, P. Universidad Catdlica, Chile. 'U. Wisconsin-Madison, U S.A. Abstract Traditional stormwater management, which relies heavily on detention storage, does not mitigate groundwater depletion resulting fxom groundwater pumping and loss of groundwater recharge. There has been an increasing interest in the use of alternative practices, such as rain gardens, that enhance infiltration of stormwater. A rain garden is a landscaped garden in a shallow depression of relatively small area that receives the stonnwater from an impervious surface. We developed a simple numerical model that can be applied in the design and evaluation of rain gardens. Water flow through the rain garden soil is modelled over three layers: a root zone, a middle storage layer of hlgh conductivity, and a lower layer that represents the subsoil at

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