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Water 2016, 8(12), 560; doi:10.3390/w8120560

Applicability of a Nu-Support Vector Regression Model for the Completion of Missing Data in Hydrological Time Series

Department of Physical Geography and Geoecology, Faculty of Science, Charles University in Prague, Albertov 6, Praha 2 128 43, Prague, Czech Republic
Author to whom correspondence should be addressed.
Academic Editor: Marco Franchini
Received: 7 October 2016 / Revised: 19 November 2016 / Accepted: 24 November 2016 / Published: 30 November 2016
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This paper analyzes the potential of a nu-support vector regression (nu-SVR) model for the reconstruction of missing data of hydrological time series from a sensor network. Sensor networks are currently experiencing rapid growth of applications in experimental research and monitoring and provide an opportunity to study the dynamics of hydrological processes in previously ungauged or remote areas. Due to physical vulnerability or limited maintenance, networks are prone to data outages, which can devaluate the unique data sources. This paper analyzes the potential of a nu-SVR model to simulate water levels in a network of sensors in four nested experimental catchments in a mid-latitude montane environment. The model was applied to a range of typical runoff situations, including a single event storm, multi-peak flood event, snowmelt, rain on snow and a low flow period. The simulations based on daily values proved the high efficiency of the nu-SVR modeling approach to simulate the hydrological processes in a network of monitoring stations. The model proved its ability to reliably reconstruct and simulate typical runoff situations, including complex events, such as rain on snow or flooding from recurrent regional rain. The worst model performance was observed at low flow periods and for single peak flows, especially in the high-altitude catchments. View Full-Text
Keywords: data-driven model; SVR; runoff; precipitation; snowmelt; sensor network data-driven model; SVR; runoff; precipitation; snowmelt; sensor network

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Langhammer, J.; Česák, J. Applicability of a Nu-Support Vector Regression Model for the Completion of Missing Data in Hydrological Time Series. Water 2016, 8, 560.

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