Stability index for the planview morphology of alluvial rivers and a case study of the Lower Yellow River

Liu, Yanhui; Wang, Yuanjian; Jiang, Enhui

doi:10.1016/j.geomorph.2021.107853

Cited by 12 publications

(5 citation statements)

References 55 publications

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“…The sustainability of flow and sediment transport is to ensure the safe and sustainable existence of the river system. For this, four indexes including the erosion and siltation amount of the channel, the bankfull discharge, the elevation difference between flood plain and channel, and the relative stability index of river regime ( RSIRR ) (Liu et al, 2021) were adopted. RSIRR uses geometric parameters to directly reflect the intensity of river oscillations, which has the advantages of simple form and clear physical significance.…”

Section: Methodsmentioning

confidence: 99%

Study on the coordination of flow and sediment transport, ecological environment, and crop production in the Lower Yellow River since 2000

Jiang,

Qu,

Jia

et al. 2023

River

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The Xiaolangdi Reservoir has been operated for 23 consecutive years, greatly altering the flow and sediment processes of the Lower Yellow River. Many research have separately analyzed the changes of siltation in reservoirs and river channels, discharge capacity of the lower river channel, river regime stability, or ecological environmental benefits under water and sediment regulation. However, the multiple changes of flow and sediment transport, ecological environment, and social economy were seldom considered. We systematically and holistically explored the changes of river system in the Lower Yellow River since 2000, based on the channel erosion and siltation, channel morphology, ecosystem patterns and habitat quality, irrigation water scale, and crop production index. The results show that the discharge capacity of the main channel has been recovered significantly at a bankfull discharge of over 4700 m3/s. The ecological pattern in the Lower Yellow River and the delta has been optimized. The wetland and water ecosystem area has been remarkably increased by 125.82% and 318.54% respectively, and the saline‐alkali land area has been sharply reduced by 89.65%. The habitat quality has been raised to the highest level in nearly 40 years. The irrigation water volume in the irrigation area of the Lower Yellow River has been increased by 31%, and the grain production has maintained a continuous growth for 16 years. Overall, the coordinated development level of flow and sediment transport, ecological environment and crop production in the Lower Yellow River has been continuously improved from the reluctantly coordinated level (before water and sediment regulation) to the highly coordinated level.

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Section: Methodsmentioning

confidence: 99%

Study on the coordination of flow and sediment transport, ecological environment, and crop production in the Lower Yellow River since 2000

Jiang,

Qu,

Jia

et al. 2023

River

Self Cite

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“…For instance, Kong developed anabranching indices, braid-channel ratio, sinuosity, and lateral migration rate to investigate marked morphological changes in the LYR 27 . Liu introduced a novel quantitative metric called the relative stability index of river regimes to assess the stability of river channels 23 . Sarif focused on the meandering of the river sinuosity and erosion–deposition dynamics to river channel migration 1 .…”

Section: Introductionmentioning

confidence: 99%

A cusp catastrophe model for analyzing sudden channel shifting in wandering reach of the Lower Yellow River

Zhang,

Jiang,

et al. 2023

Sci Rep

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Sudden channel shifting of wandering rivers poses significant challenges for river engineering, flood control strategies, and the security of water resources. This study proposes a novel analytical model to quantitatively assess such channel shifts based on the cusp catastrophe theory. Utilizing bathymetric data from 93 river sections collected biannually between 2015 and 2019, a comprehensive investigation of channel instability in the wandering reach of the Lower Yellow River was conducted. The results show that both lateral and longitudinal stabilities in the Huayuankou-Gaocun section were generally favorable. For the most part of the selected sections demonstrated a propensity for gradual change. Out of the 93 sections, totally 45 were identified as being susceptible to sudden channel shifts. These vulnerable sections were predominantly located in two highly active reaches—Xiaodabin-Jinglonggong and Huayuankou-Zhaolanzhuang—during the period from 2015 to 2017, excluding the 2018–2019 non-flood season. In the latter non-flood period, nearly half of the sections in the downstream reach from Jinglonggong displayed instability. Our findings are consistent closely with empirical observations from the Lower Yellow River. Additionally, the changed flow and sediment conditions in the 2015–2019 and the efficiency of guide works have significant effects on the stability of river channels.

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“…The alluvial rivers are usually classified as straight, meandering, braided, or wandering rivers, depending on their forms. In addition, braided and wandering rivers, which possess complex planar landscapes, are more unstable than linear and meandering ones [10][11][12][13]. In general, a natural river consists of several river forms.…”

Section: Introductionmentioning

confidence: 99%

An Improved Method and the Theoretical Equations for River Regulation Lines

Zhang

Hou

et al. 2023

Sustainability

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The regulation of wandering rivers is a universal problem that attracts significant attention. To effectively control the dynamic state of river course, it is necessary to adjust and construct river training works, which can be regarded as inseparable parts of the planning of river regulation lines. In this study, by comprehensively analyzing the water and sediment discharge in the wandering river of the Yellow River over the period 1952–2020, the large change in water and sediment conditions will inevitably affect the change in river regimes. By analyzing the river regime evolution process from 1990 to 2020 and calculating the river change index, it is found that the wandering channel of the Yellow River has gradually been stabilized, and there is no longer a large channel change, but a small amplitude swing still occurs frequently since 2010. Therefore, these phenomena highlight an urgent need for improving the planning of river regulation lines. According to the properties of parabola, circular arcs, elliptical arcs and curvature arcs, these curves are used to describe the flow path of the river. The theoretical equations of river regulation line with four curve forms are developed based on the latest river regimes and the location of the existing training works as the basis. Four groups of theoretical equations were verified by selecting typical river bends or reaches. The innovative practices from this study may assist in providing technical references, which control the frequent changes that occurred in river regime, as well as guaranteeing the healthy and sustainable development of rivers.

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Stability index for the planview morphology of alluvial rivers and a case study of the Lower Yellow River

Cited by 12 publications

References 55 publications

Study on the coordination of flow and sediment transport, ecological environment, and crop production in the Lower Yellow River since 2000

Study on the coordination of flow and sediment transport, ecological environment, and crop production in the Lower Yellow River since 2000

A cusp catastrophe model for analyzing sudden channel shifting in wandering reach of the Lower Yellow River

An Improved Method and the Theoretical Equations for River Regulation Lines

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