Scholarlink

<p>Studies on the flood-sediment peak hysteresis provide critical theoretical foundations for identifying watershed sediment sources, clarifying sediment transport pathways, and assessing fluvial erosion–deposition dynamics. An in-depth analysis of this hysteretic evolution during flood events is thus imperative, as it underpins evidence-based water–sediment regulation strategies. To address research gaps—specifically the unclear spatial variability and causal mechanisms of flood-sediment peak hysteresis in the middle Yellow River—this study combined in-situ data statistical analysis with hysteretic research methods. Based on 2002–2024 water–sediment time-series data from the Tongguan–Xiaolangdi segment, it systematically examined the longitudinal spatial variability of sediment peak hysteresis and its key drivers. The results show that sediment peak hysteresis in the Tongguan–Xiaolangdi reach of the middle Yellow River intensifies significantly along the course, with water–sediment disequilibrium worsening continuously. No distinct hysteretic tendency is detected at Tongguan Station. After regulation by the Sanmenxia Reservoir, the proportions of synchronous and delayed sediment peaks rise slightly, whereas that of advanced ones declines from 36.1 to 23.6%. At the Xiaolangdi Reservoir outflow, the proportion of advanced sediment peaks surges to 50.0%, thus becoming the dominant hysteretic type. Meanwhile, the average lag days of delayed peaks and lead days of advanced peaks increase by 2.4&#xa0;days and 1.2&#xa0;days, respectively. Moreover, reservoir regulation reshaped sediment hysteretic transport: the highest hysteresis risk occurred at 3000 m<sup>3</sup>/s discharge, with pronounced hysteresis across 500–4500 m<sup>3</sup>/s, while lagging transport risk peaked at 3500 m<sup>3</sup>/s. Overall, the study highlights the necessity of integrated hydrological-sediment management strategies to mitigate ecological and water resource impacts.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Hysteresis characteristics of sediment peaks during floods in the middle yellow river under reservoir influence

  • 期刊论文

  • 发表日期：

    2026年2月2日

查看全文
  • Rongjie Tang,
  • Fan Chen,
  • Jiangyu Wang,
  • Wei Zhang,
  • Zhisen Wang

摘要

Studies on the flood-sediment peak hysteresis provide critical theoretical foundations for identifying watershed sediment sources, clarifying sediment transport pathways, and assessing fluvial erosion–deposition dynamics. An in-depth analysis of this hysteretic evolution during flood events is thus imperative, as it underpins evidence-based water–sediment regulation strategies. To address research gaps—specifically the unclear spatial variability and causal mechanisms of flood-sediment peak hysteresis in the middle Yellow River—this study combined in-situ data statistical analysis with hysteretic research methods. Based on 2002–2024 water–sediment time-series data from the Tongguan–Xiaolangdi segment, it systematically examined the longitudinal spatial variability of sediment peak hysteresis and its key drivers. The results show that sediment peak hysteresis in the Tongguan–Xiaolangdi reach of the middle Yellow River intensifies significantly along the course, with water–sediment disequilibrium worsening continuously. No distinct hysteretic tendency is detected at Tongguan Station. After regulation by the Sanmenxia Reservoir, the proportions of synchronous and delayed sediment peaks rise slightly, whereas that of advanced ones declines from 36.1 to 23.6%. At the Xiaolangdi Reservoir outflow, the proportion of advanced sediment peaks surges to 50.0%, thus becoming the dominant hysteretic type. Meanwhile, the average lag days of delayed peaks and lead days of advanced peaks increase by 2.4 days and 1.2 days, respectively. Moreover, reservoir regulation reshaped sediment hysteretic transport: the highest hysteresis risk occurred at 3000 m3/s discharge, with pronounced hysteresis across 500–4500 m3/s, while lagging transport risk peaked at 3500 m3/s. Overall, the study highlights the necessity of integrated hydrological-sediment management strategies to mitigate ecological and water resource impacts.