Prediction Of Hydrological Models’ Uncertainty By A Committee Of Machine Learning-Models

Conference paper (2014)

Authors

N. Kayastha IHE Delft Institute for Water Education
D.P. Solomatine Water Resources - CEG , IHE Delft Institute for Water Education
D. Lal Shrestha CSIRO Land and Water
Research Group
Water Resources (CEG) (TU Delft)
Copyright: © 2014 N. Kayastha, D.P. Solomatine, D. Lal Shrestha
Machine learning Uncertainty analysis Hydrological model MLUE Model averaging
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Published Date

2014

Language

English

Faculty

Civil Engineering & Geosciences

Department

Water Management

Research Group

Water Resources

Abstract

In the MLUE method (reported in Shrestha et al. [1, 2]) we run a hydrological model M for multiple realizations of parameters vectors (Monte Carlo simulations), and use this data to build a machine learning model V to predict uncertainty (quantiles) of the model M output. In this paper, for model V, we employ three machine learning techniques, namely, artificial neural networks, model tree, locally weighted regression which leads to several models results. We propose to use the simple averaging method (SA) and the weighted model averaging method (WMA) to form a committee of these models. These approaches are applied to estimate uncertainty of streamflows simulation in Bagmati catchment in Nepal. Tests on the different data sets show that WMA performs a bit better than SA.