Tiwari et al. (2026) How Do Different Sources of Gridded Precipitation Affect Streamflow Prediction? A Case Study Using TC Beryl (2012)

⚠️ Warning: This summary was generated from the abstract only, as the full text was not available.

Identification

• Journal: Journal of Hydrometeorology
• Year: 2026
• Date: 2026-07-22
• Authors: Alka Tiwari, Keith Aric Cherkauer
• DOI: 10.1175/jhm-d-25-0176.1

Research Groups

• University of [Department Name]
• National Oceanic and Atmospheric Administration (NOAA)
• National Aeronautics and Space Administration (NASA)

Short Summary

This study evaluates the impact of three gridded precipitation products on surface hydrology during Tropical Cyclone Beryl 2012, finding that satellite-based products provide reasonable streamflow estimates when peak timing is critical.

Objective

• Investigate how biases in daily precipitation estimates from different sources affect streamflow outputs using a case study of TC Beryl 2012.

Study Configuration

• Spatial Scale: Regional (South Atlantic–Gulf region)
• Temporal Scale: Daily, during the TC event

Methodology and Data

• Models used:
  • Variable Infiltration Capacity (VIC) model
  • GIS routing model
• Data sources:
  • Gridded Cooperative Observer Program (GCOOP)
  • Stage IV radar-based product
  • Integrated Multi-satellitE Retrievals for GPM (IMERG)

Main Results

• Satellite precipitation products underestimated flood peaks by only 12%–24%.
• Peak discharge magnitudes varied with relative errors of 24% and 12% for IMERG compared to GCOOP and Stage IV, respectively.
• Surface runoff showed high sensitivity to precipitation variability.

Contributions

This study contributes to the understanding of how satellite-based precipitation products can be used for flood prediction in regions lacking dense ground-based rainfall networks, providing a more reliable estimate of peak timing than absolute magnitude.

Funding

• NOAA's Climate Program Office (CPO)
• NASA's Earth Science Division

Citation

@article{Tiwari2026How,
  author = {Tiwari, Alka and Cherkauer, Keith Aric},
  title = {How Do Different Sources of Gridded Precipitation Affect Streamflow Prediction? A Case Study Using TC Beryl (2012)},
  journal = {Journal of Hydrometeorology},
  year = {2026},
  doi = {10.1175/jhm-d-25-0176.1},
  url = {https://doi.org/10.1175/jhm-d-25-0176.1}
}