Hossain et al. (2026) Regional Skew Map for New South Wales in Australia for Flood Frequency Analysis

Identification

• Journal: Lecture notes in civil engineering
• Year: 2026
• Date: 2026-01-01
• Authors: S. M. Anwar Hossain, Ataur Rahman
• DOI: 10.1007/978-3-032-18708-6_23

Research Groups

School of Engineering, Design and Built Environment, Western Sydney University, Sydney, New South Wales, Australia.

Short Summary

This study developed a high-resolution regional skewness map for New South Wales, Australia, using Log-Pearson Type III distributions and geostatistical interpolation of annual maximum flow data, revealing distinct spatial patterns of flood behavior to improve flood frequency analysis in both gauged and ungauged basins.

Objective

• To develop a high-resolution regional skewness map for New South Wales (NSW), Australia, using Log-Pearson Type III (LP3) distributions to improve spatial understanding of flood behavior and support flood estimation in both gauged and ungauged basins.

Study Configuration

• Spatial Scale: New South Wales (NSW), Australia.
• Temporal Scale: Minimum of 50 years of annual maximum flow records per station.

Methodology and Data

• Models used: Log-Pearson Type III (LP3) distribution for fitting at each site; Geostatistical methods for spatial interpolation.
• Data sources: Annual maximum flow (AMF) records from 85 streamflow gauging stations.

Main Results

• A high-resolution regional skewness map for New South Wales was successfully developed.
• The map reveals clear spatial patterns: high positive skewness dominates arid and semi-arid inland regions, indicating a greater potential for extreme floods.
• Lower or near-zero skewness is observed in coastal and high-rainfall zones.

Contributions

• Provides a robust tool and hydrologically meaningful insights for enhancing flood frequency analysis in New South Wales.
• Enables more accurate flood quantile estimation in data-scarce areas by incorporating spatially coherent skewness information.
• Offers the first high-resolution regional skewness map for NSW based on LP3 distributions.

Funding

• Not explicitly stated in the provided paper text.

Citation

@article{Hossain2026Regional,
  author = {Hossain, S. M. Anwar and Rahman, Ataur},
  title = {Regional Skew Map for New South Wales in Australia for Flood Frequency Analysis},
  journal = {Lecture notes in civil engineering},
  year = {2026},
  doi = {10.1007/978-3-032-18708-6_23},
  url = {https://doi.org/10.1007/978-3-032-18708-6_23}
}