Catchment hydrology modelling for stormwater harvesting study in SEQ: from instrumentation to simulation

Chowdhury, R. and Gardner, T. and Gardiner, R. and Chong, M. and Tonks, M. (2010) Catchment hydrology modelling for stormwater harvesting study in SEQ: from instrumentation to simulation. In: Science Forum and Stakeholder Engagement: Building Linkages, Collaboration and Science Quality, 28-29 Sept 2010, Brisbane, Australia.


Hydrology modelling is essential for stream flow simulation and to define hydrologic characteristics of streams. A reliable flow simulation depends on availability of reliable stream flow data and a reliable rainfall runoff model. In this project, considerable effort has been invested in instrumentation of 12 catchments located in South East Queensland (SEQ) in order to obtain continuous rainfall and creek flow data. These catchments represent a diverse range of land use characteristics. Using one year (April 2009 to March 2010) of continuous rainfall and flow data, six catchments have been calibrated and validated at hourly time scale using the Storm Water Management Model (SWMM). The calibrated model was then used to simulate 30 years of creek flow data using historic rainfall data from 1975 to 2005. Simulations were carried out to predict creek hydrologic responses to catchment urbanisation. This was performed by increasing catchment imperviousness. We found that catchment imperviousness increases runoff percentage from 12% at unimpacted condition to 38% at 50% impervious condition. Number of flow events increased from seven events/year to 37 events/year at 50% imperviousness. The one-month to six-month ARI peak flow events were observed to increase significantly with imperviousness. This continuing study will help to identify ecologically sustainable stormwater harvesting practices in SEQ.

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Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Paper)
Refereed: Yes
Item Status: Live Archive
Additional Information: © 2010 CSIRO To the extent permitted by law, all rights are reserved and no part of this publication covered by copyright may be reproduced or copied in any form or by any means except with the written permission of CSIRO.
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - Department of Surveying and Land Information
Date Deposited: 26 Jun 2018 05:32
Last Modified: 26 Jun 2018 05:47
Uncontrolled Keywords: catchment, flow, calibration, simulation, stormwater harvesting
Fields of Research : 09 Engineering > 0905 Civil Engineering > 090509 Water Resources Engineering
Socio-Economic Objective: D Environment > 96 Environment > 9609 Land and Water Management > 960912 Urban and Industrial Water Management

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