Abstract
AbstractThe Global Runoff Data Center (GRDC) data set has faced a decline in the number of active gauges since the 1980s, leaving only 14% of gauges active as of 2020. We develop the Remote Sensing-based Extension for the GRDC (RSEG) data set that can ingest legacy gauge discharge and remote sensing observations. We employ a stochastic nonparametric mapping algorithm to extend the monthly discharge time series for inactive GRDC stations, benefiting from satellite imagery- and altimetry-derived river width and water height observations. After a rigorous quality assessment of our estimated discharge, involving statistical validation, tests and visual inspection, results in the extension of discharge records for 3377 out of 6015 GRDC stations. The quality of discharge estimates for the rivers with a large or medium mean discharge is quite satisfactory (average KGE value > 0.5) however for river reaches with a low mean discharge the average KGE value drops to 0.33.The RSEG data set regains monitoring capability for 83% of total river discharge measured by GRDC stations, equivalent to 7895 km3/month.
Funder
Deutsche Forschungsgemeinschaft
Publisher
Springer Science and Business Media LLC
Reference35 articles.
1. Shiklomanov, I. A. The world’s water resources. In Proceedings of the international symposium to commemorate 25 Years of the IHP, UNESCO/IHP, vol. 25, 93–126 (Unesco Paris, France, 1991).
2. Dobriyal, P., Badola, R., Tuboi, C. & Hussain, S. A. A review of methods for monitoring streamflow for sustainable water resource management. Appl. Water Sci. 7, 2617–2628, https://doi.org/10.1007/s13201-016-0488-y (2017).
3. WMO. International glossary of hydrology (Paris (France) UNESCO/WMO, 1992).
4. Gleason, C. J. & Durand, M. T. Remote sensing of river discharge: A review and a framing for the discipline. Remote. Sens. 12, 1107, https://doi.org/10.3390/rs12071107 (2020).
5. Zakharova, E. A., Kouraev, A. V., Cazenave, A. & Seyler, F. Amazon River discharge estimated from TOPEX/Poseidon altimetry. Comptes Rendus Geosci. 338, 188–196, https://doi.org/10.1016/j.crte.2005.10.003 (2006).
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