a bayesian joint probability post-processor for reducing errors and quantifying uncertainty in monthly streamflow predictions

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2013
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Abstract
Hydrologic model predictions are often biased and subject to heteroscedastic errors originating from various sources including data, model structure and parameter calibration. Statistical post-processors are applied to reduce such errors and quantify uncertainty in the predictions. In this study, we investigate the use of a statistical post-processor based on the Bayesian joint probability (BJP) modelling approach to reduce errors and quantify uncertainty in streamflow predictions generated from a monthly water balance model. The BJP post-processor reduces errors through elimination of systematic bias and through transient errors updating. It uses a parametric transformation to normalize data and stabilize variance and allows for parameter uncertainty in the post-processor. We apply the BJP post-processor to 18 catchments located in eastern Australia and demonstrate its effectiveness in reducing prediction errors and quantifying prediction uncertainty.
Reference Key
pokhrel2013hydrologya Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors P. Pokhrel, D. E. Robertson, Q. J. Wang
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Journal materials research bulletin
Year 2013
DOI
10.5194/hess-17-795-2013
URL
http://www.hydrol-earth-syst-sci.net/17/795/2013/hess-17-795-2013.pdf
Keywords
anthropology recreationenvironmental sciences sanitary engineeringgeography technologyenvironmental technology

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