Preprints
https://doi.org/10.5194/essd-2022-231
https://doi.org/10.5194/essd-2022-231
 
05 Aug 2022
05 Aug 2022
Status: this preprint is currently under review for the journal ESSD.

The use of GRDC gauging stations for calibrating large-scale hydrological models

Peter Burek and Mikhail Smilovic Peter Burek and Mikhail Smilovic
  • International Institute for Applied Systems Analysis, Laxenburg, Austria

Abstract. The Global Runoff Data Centre provides time series of observed discharges that are valuable for calibrating and validating the results of hydrological models. We address a common issue in large-scale hydrology that has not been satisfactorily solved, though investigated several times. To compare simulated and observed discharge, grid-based hydrological models must fit reported station locations to the resolution-dependent gridded river network. We introduce an Intersection over Union ratio approach to selected station locations on a coarser grid-scale, reducing the errors in assigning stations to the correct upstream basin. We update the 10-year-old database of watershed boundaries with additional stations based on a high-resolution (3 arc seconds) river network and provide source codes and high- and low-resolution watershed boundaries. The dataset is stored on Zenodo with the associated DOI https://doi.org/10.5281/zenodo.6906577

Peter Burek and Mikhail Smilovic

Status: open (until 09 Jan 2023)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on essd-2022-231', Anonymous Referee #1, 05 Oct 2022 reply

Peter Burek and Mikhail Smilovic

Data sets

The use of GRDC gauging stations for calibrating large-scale hydrological models Peter Burek, Mikhail Smilovic https://doi.org/10.5281/zenodo.6906577

Model code and software

The use of GRDC gauging stations for calibrating large-scale hydrological models Peter Burek, Mikhail Smilovic https://github.com/iiasa/CWATM_grdc_calibration_stations

Peter Burek and Mikhail Smilovic

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Short summary
We address an annoying problem every grid-based hydrological model must solve to compare simulated with observed river discharge. First, station locations do not fit with the high-res river network. We updated the database with stations based on a new high-res network. Second, station locations do not work with a coarser grid-based river network. We use a new concept of basin-shape similarity for station locations on a coarser grid, reducing the error in assigning stations to the wrong basin.