Hydro-geomorphological characteristics in response to the water-sediment regulation scheme of the Xiaolangdi Dam in the lower Yellow River

Lu, Mengwen; Zhao, Qinghe; Ding, Shengyan; Wang, Shuoqian; Hong, Zhendong; Jing, Yaru; Wang, An

doi:10.1016/j.jclepro.2021.130324

Cited by 28 publications

(17 citation statements)

References 65 publications

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“…The distribution of reservoir sedimentation is closely related to inflow water-sediment characteristics, underwater topography, and water level variations in front of the dam. The Liujiaxia [28], Qingtongxia, Wanjiazhai [29], Tianqiao [30], Sanmenxia [31], and Xiaolangdi reservoirs [32] are located on the primary stream of the Yellow River, exhibiting similar inflow sediment characteristics to the Haibowan Reservoir. All of them have relatively high sediment concentrations during the flood season.…”

Section: Analysis Of Simulation Resultsmentioning

confidence: 99%

Operational Mode for Water–Sediment Regulation in Plain-Type Sand-Laden Reservoirs: A Case Study of the Haibowan Reservoir

Liu,

Wang,

Liu

et al. 2024

Water

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Excessive sedimentation in sand-laden rivers significantly hinders the normal operation and overall effectiveness of reservoirs. This is observed particularly in plain-type sand-laden reservoirs where weak hydraulic conditions in the reservoir area contribute to sediment deposition. Water–sediment regulation is essential in reducing sedimentation and prolonging the lifespan of such reservoirs. Taking the plain-type reservoir of the primary stream of the Yellow River—Haibowan Reservoir as an example, based on a two-dimensional shallow water equation, a two-dimensional mathematical model of water and sediment in the reservoir area is established, the corresponding boundary conditions are improved, and the reliability of the model is verified. Under the premise of ensuring the flood control safety of the reservoir dam, considering the impact on the power generation of the reservoir and the downstream river, and maintaining the long-term large effective storage capacity of the reservoir as the basic principle, the water–sediment regulation scheme is proposed. A two-dimensional kinetic model of sediment transport and representative water–sediment series are employed to simulate the erosion and sedimentation processes in the reservoir under different schemes. The optimisation and comparison of multiple schemes reveal that the sediment-flushing scheme, which lowers the water level to 1072 m above sea level when the inflow discharge is 1500–2760 m3/s and inflow sediment concentration is 5–10 kg/m3, can yield an effective reservoir capacity of 97 million m3 and an average annual hydropower generation of 389.5 million kWh after 15 years of operation. This scheme outperforms the existing sediment-flushing scheme and is recommended as an optimised approach for water–sediment regulation in reservoirs. The results of this study provide technical support for the application of water–sediment regulation in the Haibowan Reservoir and may be useful in the exploration and management of water–sediment regulation for plain-type reservoirs on sand-laden rivers.

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Section: Analysis Of Simulation Resultsmentioning

confidence: 99%

Operational Mode for Water–Sediment Regulation in Plain-Type Sand-Laden Reservoirs: A Case Study of the Haibowan Reservoir

Liu,

Wang,

Liu

et al. 2024

Water

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“…After the construction of the Massanjore Reservoir in India, the channel downstream of the dam exhibited narrowing of the river width bundle, coarsening of the riverbed, reduction in lateral stability, and an increase in the branching index [15]. After the impoundment of the Xiaolangdi Reservoir on the Yellow River, the downstream river continued to be flushed, the bankfull discharge increased, and the river situation was adjusted [16][17][18]. Since the construction of the Danjiangkou Reservoir, the downstream has been transformed from an accretionary channel to a scouring channel, with weakening of wandering characteristics and strengthening of deep erosion in the bending section [19].…”

Section: Introductionmentioning

confidence: 99%

Hydrological Changes and Sediment Dynamics in the Inner Mongolia Section of the Yellow River: Implications for Reservoir Management

Xu,

Zhao,

Chen

et al. 2024

Water

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The Inner Mongolia section of the Yellow River is a primary alluvial segment of the main channel. The variations in water and sediment not only alter the cross-sectional morphology and flow capacity of the river but also impact the scheduling of upstream cascade reservoirs. Based on runoff and sediment load data and topographic information from typical hydrological stations, the characteristics of runoff and sediment load variations and the evolutionary pattern of siltation in the Inner Mongolia River section were analyzed via trend analysis methods, Mann–Kendall test methods, the sediment load transport rate method, and the water level–flow relationship. The results showed that the water and sediment loads at the hydrological stations in the Inner Mongolia River section significantly changed from the 1960s to after 2000, with runoff decreasing by approximately 22% to 32% and the sediment load decreasing by approximately 65% to 73%. Sedimentation in the river section generally increased, and the average annual siltation amount reached 0.144 billion t. The joint utilization of the Longyangxia and Liujiaxia reservoirs in 1987 was the main reason for the rapid increase in siltation, and siltation in the Inner Mongolia River section was slightly reduced after 2005. In addition, the critical sediment load coefficients of the Bayangaole–Sanhuhekou and Sanhuhekou–Toudaoguai River sections were 0.0073 and 0.0051 kg·s/m6, respectively, from 1952 to 1968, and 0.0053 and 0.0037 kg·s/m6, respectively, from 1969 to 2020. This study could provide technical support for river flood control and reservoir water sediment regulation in Inner Mongolia.

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“…Zhao et al (2022) found that there was an obvious impact on sediment discharge in reservoirs and siltation reduction in the Lower Yellow River channels. By analyzing the hydrological morphological characteristics and geomorphic process of the Lower Yellow River, Lu et al (2022) concluded that water level and suspended sediment concentration were the main factors affecting the evolution of river landforms. Wang et al (2020) analyzed satellite images before and after water and sediment regulation of Xiaolangdi Reservoir and quantitatively identified the estuarine changes on the basis of eliminating potential bias factors such as water level, precipitation, or tidal variation.…”

Section: Introductionmentioning

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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Hydro-geomorphological characteristics in response to the water-sediment regulation scheme of the Xiaolangdi Dam in the lower Yellow River

Cited by 28 publications

References 65 publications

Operational Mode for Water–Sediment Regulation in Plain-Type Sand-Laden Reservoirs: A Case Study of the Haibowan Reservoir

Operational Mode for Water–Sediment Regulation in Plain-Type Sand-Laden Reservoirs: A Case Study of the Haibowan Reservoir

Hydrological Changes and Sediment Dynamics in the Inner Mongolia Section of the Yellow River: Implications for Reservoir Management

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

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