Hong et al. (2026) Remote Sensing Hydrology Revisited: Advances, Persistent Challenges, and a Science‐Driven Agenda for the Next Decade

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Identification

• Journal: Water Resources Research
• Year: 2026
• Date: 2026-09-01
• Authors: Yang E. Hong, Dennis P. Lettenmaier, Efi Foufoula‐Georgiou, Ana Paula Barros, George J. Huffman, J. S. Famiglietti, Dawen Yang, Tamlin M. Pavelsky, Soroosh Sorooshian, Taikan Oki, Siyu Zhu, Mengye Chen, Songkun Yan
• DOI: 10.1029/2026wr043835

Research Groups

• University of California, Los Angeles (UCLA)
• University of Washington

Short Summary

This Commentary revisits the integration of satellite remote sensing into hydrologic science, arguing for a more accountable approach to quantify water storage, movement, and cycle changes.

Objective

• Investigate how Earth Observation (EO) can be used to improve hydrologic understanding and decision value beyond ground networks alone.

Study Configuration

• Spatial Scale: Global to regional scales
• Temporal Scale: Long-term trends and extreme events

Methodology and Data

• Models used: Not specified, but mentions the use of validated Earth Observation (EO) products and open-access data systems.
• Data sources: Satellite remote sensing, ground networks, and reanalysis datasets.

Main Results

• Key advances in sharpening water-cycle observability, expanding analysis-ready data systems and computation, and accelerating hybrid inference are highlighted.
• Persistent challenges limiting credible hydrologic inference near thresholds and extremes are discussed.

Contributions

• This Commentary extends the synthesis of Lettenmaier et al. (2015) by arguing for a more accountable remote sensing hydrology approach.
• It highlights the need to integrate EO into hydrologic science questions, improving understanding and decision value beyond ground networks alone.

Funding

• Not specified in the provided text.

Citation

@article{Hong2026Remote,
  author = {Hong, Yang E. and Lettenmaier, Dennis P. and Foufoula‐Georgiou, Efi and Barros, Ana Paula and Huffman, George J. and Famiglietti, J. S. and Yang, Dawen and Pavelsky, Tamlin M. and Sorooshian, Soroosh and Oki, Taikan and Zhu, Siyu and Chen, Mengye and Yan, Songkun},
  title = {Remote Sensing Hydrology Revisited: Advances, Persistent Challenges, and a Science‐Driven Agenda for the Next Decade},
  journal = {Water Resources Research},
  year = {2026},
  doi = {10.1029/2026wr043835},
  url = {https://doi.org/10.1029/2026wr043835}
}