Li et al. (2026) Wet–Dry Seasonal Dynamics of River-Network Structure and Connectivity in the Poyang Lake Basin (1990–2025)

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Identification

• Journal: Water
• Year: 2026
• Date: 2026-09-28
• Authors: Z L Li, Yao Wu, Zhongwen Xiong, Yang Guo, Xiaodong Liu, Jiayi Xu
• DOI: 10.3390/w18192403

Research Groups

• Department of Hydrology, University of Science and Technology of China
• State Key Laboratory of Water Resources and Hydropower Engineering Science

Short Summary

This study investigates seasonal hydrological fluctuations in the Poyang Lake Basin using Landsat imagery from 1990 to 2025, revealing asynchronous changes in water extent, river-network morphology, and structural connectivity.

Objective

• Investigate wet-dry seasonal variations in the Poyang Lake Basin

Study Configuration

• Spatial Scale: The study focuses on the Poyang Lake Basin in Jiangxi Province, China.
• Temporal Scale: The study spans 35 years (1990 to 2025), with a focus on eight representative years.

Methodology and Data

• Models used: None mentioned; instead, Landsat imagery and DEM-derived channel information were used for analysis.
• Data sources: Landsat satellite imagery and 30 m DEM data

Main Results

• Mean water area increased from 3407.14 km2 in the dry season to 6872.87 km2 in the wet season.
• Mean river-network density increased from 0.0348 to 0.0461 km/km2.
• Maximum Strahler order increased from III in the dry season to IV in the wet season.
• River-network complexity and development coefficient increased significantly under wet-season conditions.

Contributions

• This study highlights the need to distinguish between asynchronous changes in water extent, river-network morphology, and structural connectivity when evaluating large river-connected lake systems.

Funding

• Not specified

Citation

@article{Li2026WetDry,
  author = {Li, Z L and Wu, Yao and Xiong, Zhongwen and Guo, Yang and Liu, Xiaodong and Xu, Jiayi},
  title = {Wet–Dry Seasonal Dynamics of River-Network Structure and Connectivity in the Poyang Lake Basin (1990–2025)},
  journal = {Water},
  year = {2026},
  doi = {10.3390/w18192403},
  url = {https://doi.org/10.3390/w18192403}
}