IAHR, founded in 1935, is a worldwide independent member-based organisation of engineers and water specialists working in fields related to the hydro-environmental sciences and their practical application. Activities range from river and maritime hydraulics to water resources development and eco-hydraulics, through to ice engineering, hydroinformatics, and hydraulic machinery.
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You are here : eLibrary : IAHR World Congress Proceedings : 34th Congress - Brisbane (2011) : THEME 3: Water and Carbon: Climate Change Impact : Use of split-sample validation to assess the uncertainty in modelled streamflow
Use of split-sample validation to assess the uncertainty in modelled streamflow
Author : M. Braccia
Uncertainty in hydrologic models is interpreted through split-sample validation. This can however, lower model performance by limiting the amount of data used for calibration. The Fly Brook catchment in south-west Western Australia has continuous streamflow records from 1962 to 1999 and from 2007 to 2009. Australian Water Balance Models were developed to model the missing period of record. Four calibration scenarios based on data prior to 1999 were studied. The scenarios were selected to determine whether an extensive calibration period provides the best model outputs or whether split-sample validation is essential when estimating streamflow. Observed data post 2007 was used as a reference to assess which calibration best simulates the recent flows. The study highlighted that validation is important to indicate the reliability of flow estimates not included in calibration as all the models performed poorly when compared to observed flow from 2007 to 2009.
File Size : 691,704 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 34th Congress - Brisbane (2011)
Article : THEME 3: Water and Carbon: Climate Change Impact
Date Published : 01/07/2011
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