Towards Improved Predictions in Ungauged Basins: Exploiting the Power of Machine Learning

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Authors

Frederik Kratzert, Daniel Klotz, mathew herrnegger, Alden Keefe Sampson , Sepp Hochreiter, Grey Nearing 

Abstract

Long Short-Term Memory (LSTM) networks offer unprecedented accuracy for prediction in ungauged basins. We trained and tested an LSTM on the CAMELS basins (approximately 30 years of daily rainfall/runoff data from 531 catchments in the US of sizes ranging from 4 km² to 2,000 km²) using k-fold validation, so that predictions were made in basins that supplied no training data. This effectively `ungauged model was benchmarked over a 15-year validation period against the Sacramento Soil Moisture Accounting (SAC-SMA) model and also against the NOAA National Water Model reanalysis. SAC-SMA was calibrated separately for each basin using 15 years of daily data (i.e., this is a `gauged model). The out-of-sample LSTM had higher median Nash-Sutcliffe Efficiencies across the 531 basins (0.69) than either the calibrated SAC-SMA (0.64) or the National Water Model (0.58). We outline several future research directions that would help develop this technology into a comprehensive regional hydrology model.

DOI

https://doi.org/10.31223/osf.io/4rysp

Subjects

Earth Sciences, Hydrology, Physical Sciences and Mathematics

Keywords

machine learning, Deep learning, hydrology, modeling, Rainfall-Runoff

Dates

Published: 2019-08-26 19:08

Last Updated: 2019-11-25 06:15

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License

GNU Lesser General Public License (LGPL) 2.1

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