Delta-and-Fluvial-Fan-Networks

Supplementary Data for Gezovich et al., 2025 - Discriminating fluvial fans and deltas: Channel network morphometrics reflect distinct formative processes

Overview

This repository contains most of the mapped channel networks for deltas and fluvial fans included as shapefiles. The dataset includes channel order, lengths, widths, and branching angles in comma-separated value files. These data support the analyses presented in Gezovich et al., 2025.

Contents

• Shapefiles/ - Polyline features for each delta and fluvial fan channel network.
• CSV/ - Channel measurements (length, widths, angles) in Python- and Pandas-readable format.

Methods Summary

• Channel networks were mapped manually in ArcGIS Pro (v3.2.1) using the ESRI World Imagery basemap.
• Channel widths and angles were measured at multiple points along each segment: immediately after a bifurcation node, immediately before the next node, and at the midpoint.
• Land–water boundaries were identified visually based on color, texture (e.g., ripples, smoothness), and vegetation contrast.
• Widths were normalized to the first-order channel width to minimize variability caused by spatial resolution limits (~0.5 m/pixel) and seasonal flow differences.
• Channel lengths were also normalized to first-order channel widths following Edmonds & Slingerland (2007).

Citation

If you use these data, please cite:

Gezovich et al., (2025). Discriminating fluvial fans and deltas: Channel network morphometrics reflect distinct formative processes. [EGU: Earth Surface Dynamics].

License

CC-BY 4.0

Contact

For questions or issues regarding this dataset, please contact Luke Gezovich: lukegezovich@gmail.com