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Identification of improved rainfall-runoff models for an ephemeral low yielding Australian catchment.

Ye, Wei and Jakeman, Anthony J. and Young, Peter C. (1998) Identification of improved rainfall-runoff models for an ephemeral low yielding Australian catchment. Environmental Modelling and Software, 13 (1). pp. 59-74. ISSN 1364-8152

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Abstract

The paper discusses how the conceptual rainfall-runoff model IHACRES (Identification of Hydrographs And Components from Rainfall, Evapotranspiration and Streamflow data) has been extended for application to ephemeral catchments. Such catchments normally operate on a delicate hydrological balance, which is quite often manifested by strong non-linearities in their runoff response, including cessation of flow during the 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 or no discharge.

Item Type: Article
Journal or Publication Title: Environmental Modelling and Software
Uncontrolled Keywords: Surface hydrology ; Rainfall-runoff model ; Ephemeral low-yielding catchment
Subjects: G Geography. Anthropology. Recreation > GE Environmental Sciences
Departments: Faculty of Science and Technology > Lancaster Environment Centre
ID Code: 21889
Deposited By: ep_ss_importer
Deposited On: 11 Feb 2009 10:08
Refereed?: Yes
Published?: Published
Last Modified: 26 Jul 2012 15:53
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/21889

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