Journal article

A simple two-parameter model for scaling hillslope surface runoff

Gary J Sheridan, Philip J Noske, Patrick NJ Lane, Owen D Jones, Christopher B Sherwin

EARTH SURFACE PROCESSES AND LANDFORMS | WILEY | Published : 2014

Abstract

The objective of this research was to develop and parameterise a physically justified yet low-parameter model to quantify observed changes in surface runoff ratios with hillslope length. The approach starts with the assumption that a unit of rainfall-excess runoff generated at a point is a fraction β of precipitation P (m) which travels some variable distance down a slope before reinfiltrating, depending on the local rainfall, climate, soils, etc. If this random distance travelled Y is represented by a distribution, then a survival function will describe the probability of this unit of runoff travelling further than some distance x (m). The total amount of per unit width runoff Q (m2) flowin..

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Grants

Funding Acknowledgements

The authors would like to sincerely thank John Costenaro for his tireless field support. This project was funded by the Department of Sustainability and Environment, Victoria, and the Cooperative Research Centre Forestry. Many thanks to the reviewers of this manuscript, whose suggestions greatly improved the final paper.