Publication Date:
2024-03-25
Description:
Assessments of water and energy security over historical and future periods require hydrologic models that can accurately simulate reservoir operations. However, scare reservoir operation data limits the accuracy of current reservoir representations in simulating reservoir behaviors. Furthermore, the reliability of these representations under changing inflow regimes remains unclear, which makes their application for long future planning horizons questionable. To this end, we propose a synergistic framework to predict the release, storage, and hydropower production of ungauged reservoirs (i.e., reservoirs without in‐situ inflow, release, storage, and operating rules) by combining remotely sensed reservoir operating patterns and model‐simulated reservoir inflow with conceptual reservoir operation schemes within a land surface‐hydrologic model. A previously developed reservoir operation scheme is extended with a storage anomaly based calibration approach to accommodate the relatively short time series and large time intervals of remotely sensed data. By setting up controlled experiments in the Yalong River Basin in China, we show that remote sensing can improve the parameter estimation and simulations of ungauged reservoirs for all selected reservoir operation schemes, thereby improving the downstream flood and streamflow simulations. However, most of these schemes show degraded accuracies of reservoir operation simulations under a changing inflow regime, which could lead to unreliable assessments of future water resources and hydropower production. In comparison, our newly extended reservoir operation scheme can be more adaptable to flow regime variations. Our study provides a practical framework for reservoir impact assessments and predictions with the ongoing satellite altimetry projects such as Surface Water and Ocean Topography.
Description:
Key Points:
Satellite remote sensing can improve the representation of ungauged reservoirs and streamflow simulations in hydrologic models.
A reservoir operation scheme for ungauged reservoirs is extended and tailored to the use of remotely sensed reservoir operation data.
Reservoir operation schemes with storage‐based model structures can be more reliable in reservoir simulations under a changing flow regime.
Description:
National Key Research and Development Program of China
http://dx.doi.org/10.13039/501100012166
Description:
Belt and Road Special Foundation of the State Key Laboratory of Hydrology‐Water Resources and Hydraulic Engineering
Description:
German Research Foundation
Description:
German Federal Ministry of Science of Education
Description:
https://doi.org/10.5281/zenodo.7190469
Description:
https://global-surface-water.appspot.com/download
Description:
https://doi.org/10.18738/T8/DF80WG
Description:
https://aviso-data-center.cnes.fr/
Keywords:
ddc:551.48
;
reservoir operation schemes
;
remote sensing
;
satellite altimetry
;
SWOT
;
hydrologic prediction
;
hydrologic simulation
Language:
English
Type:
doc-type:article
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