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DOI: https://doi.org/10.11988/ckyyb.20241191

Analysis of Ecological Flow Compliance at Key Control Sections in the Yangtze River Basin and Optimization Suggestions

  • WANG Dan-yang , 1, 2 ,
  • TANG Xian-qiang , 1, 2 ,
  • WU Xu-min 3 ,
  • PENG Kang 1, 2 ,
  • HU Yan-ping 1, 2 ,
  • LIU Han 1, 2 ,
  • LI Rui 1, 2
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  • 1. Department of Watershed Water Environment, Changjiang Academy of Sciences, Changjiang Water Resources Commission, Wuhan 430010,China
  • 2. Hubei Provincial Key Laboratory of Watershed Water Resources and Ecological Environment Science, Wuhan 430010,China
  • 3. Hanjiang River Basin Governance and Protection Center, Changjiang Water Resources Commission, Wuhan 430010,China

Received date: 2024-11-25

  Revised date: 2025-03-17

  Online published: 2025-04-22

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Abstract

Maintaining a certain ecological flow is a crucial prerequisite for ensuring the health of aquatic ecosystems in rivers and lakes. This study analyzes the ecological flow compliance at 114 key control sections in the Yangtze River Basin from January 2023 to July 2024, revealing a seasonal single-peak pattern: high compliance rates during the wet season and low during the dry season. Significant spatial differences were observed, with compliance rates in secondary sub-basins and non-cross-provincial sections being higher than those in cross-provincial sections, and the compliance rates on the right bank of the mainstem being lower than those on the left bank. Uneven seasonal distribution of precipitation runoff, alterations in river flow distribution due tohydraulic engineering, water withdrawals for industrial and domestic use, and challenges in cross-provincial water allocation are identified as major factors contributing to non-compliance in some sections. Further, by categorizing the correspondence between ecological flow compliance and riverine ecological conditions into four categories, it was found that 60% of the sections had a high degree of correspondence, but some sections still exhibited low correspondence, indicating room for improvement in ecological flow management. The study proposes optimization strategies, including setting multiple ecological flow targets based on varying hydrological and ecological needs and dynamically adjusting them based on updated monitoring data; optimizing monitoring station layout and employing more flexible monitoring frequencies; and introducing an integrated assessment system that considers both ecological flow and environmental conditions, along with comprehensive assessments across all sub-basin levels.

Key words： Ecological flow; Yangtze River Basin; Eco-environment; Water quality; Aquatic organism; Optimization suggestion

Cite this article

WANG Dan-yang , TANG Xian-qiang , WU Xu-min , PENG Kang , HU Yan-ping , LIU Han , LI Rui . Analysis of Ecological Flow Compliance at Key Control Sections in the Yangtze River Basin and Optimization Suggestions[J]. Journal of Changjiang River Scientific Research Institute, 0 . DOI: 10.11988/ckyyb.20241191

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