Zahedi et al. (2026) Does Antecedent Catchment Wetness Explain the Timing of Rainfall‐Runoff Relationship Shifts?

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

Identification

• Journal: Water Resources Research
• Year: 2026
• Date: 2026-06-26
• Authors: Sina Zahedi, Tim J. Peterson, Murray Peel
• DOI: 10.1029/2024wr039750

Research Groups

• School of Civil Engineering, University of Melbourne
• Australian Centre for Excellence in Water Management

Short Summary

This study investigates the relationship between antecedent catchment wetness and rainfall-runoff relationships during droughts, finding that autumn wetness is crucial for transitions between low and normal runoff states.

Objective

• Determine whether antecedent catchment wetness can explain the timing of shifts into and out of low runoff states

Study Configuration

• Spatial Scale: 158 catchments in Victoria, Australia
• Temporal Scale: Annual rainfall-runoff relationships over multiple years

Methodology and Data

• Models used: Hidden Markov models (HMMs)
• Data sources: Historical seasonal or annual rainfall deficit data from Peterson et al. (2021)

Main Results

• Antecedent catchment wetness can explain the timing of rainfall-runoff relationship shifts
• Autumn wetness is important for transitions between low and normal runoff states
• Catchments have finite resilience to disturbances

Contributions

• Provides further evidence that antecedent catchment wetness contributes to catchment shifts and recovery
• Suggests development of a non-homogeneous HMM could help identify how antecedent catchment wetness affects catchment dynamics

Funding

• Australian Research Council (ARC) Discovery Project DP180100475

Citation

@article{Zahedi2026Does,
  author = {Zahedi, Sina and Peterson, Tim J. and Peel, Murray},
  title = {Does Antecedent Catchment Wetness Explain the Timing of Rainfall‐Runoff Relationship Shifts?},
  journal = {Water Resources Research},
  year = {2026},
  doi = {10.1029/2024wr039750},
  url = {https://doi.org/10.1029/2024wr039750}
}