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Updated: May 23, 2026

A Protocol for Conducting Rainfall Simulation to Study Soil Runoff
Published on: April 3, 2014
The application of an analytical probabilistic model for estimating the rainfall-runoff reductions achieved using a
Hyoungjun Kim1, Mooyoung Han, Ju Young Lee
1Department of Civil and environmental Engineering, Seoul National University, 599 Gwanak-ro, Gwanak-gu, Seoul 151-744, South Korea.
Abstract:
Rainwater harvesting systems cannot only supplement on-site water needs, but also reduce water runoff and lessen downstream flooding. In this study, an existing analytic model for estimating the runoff in urban areas is modified to provide a more economical and effective model that can be used for describing rainwater harvesting. This model calculates the rainfall-runoff reduction by taking into account the catchment, storage tank, and infiltration facility of a water harvesting system; this calculation is based on the water balance equation, and the cumulative distribution, probability density, and average rainfall-runoff functions. This model was applied to a water harvesting system at the Seoul National University in order to verify its practicality. The derived model was useful for evaluating runoff reduction and for designing the storage tank capacity.
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