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Abstract
Ye, W., Jakeman, A.J. and Young, P.C. (1998) Identification of improved
rainfall-runoff models for an ephemeral low yielding Australian catchment.
Environmental Modelling and Software, 13, 59-74.
The paper discusses how the conceptual rainfall-runoff model IHACRES has
been extended for application to ephemeral catchments. Such catchments
operate on a delicate hydrological balance, which is often manifested in
strong nonlinearities in their runoff response., including cessation of
flow during Summer periods of the year. The standard IHACRES model has
worked well in temperate, humid catchments, providing reliable predictions
on independent streamflow data sets and encapsulating catchment response
dynamics in a systematic way. Not surprisingly, however, it does not
perform so well for dry climate, low yield catchments and it is necessary
to include an additional nonlinear mechanism to account for the ephemeral
nature of the discharge. The results of this extended model, when applied
to an Australian benchmark catchment, demonstrate significant improvements
in simulating runoff during the dry season when significant rainfall events
produce little of no discharge.
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Updating responsibility Arun Chotai. This page is copyright of Lancaster University.
12/10/01 - PGM.
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