A Study on Prediction of Sedimentation Efficiency for Sedimentation Basin using Lagrangian Method

Choi, Jong-Woong; Hong, Seongbin; Kim, Seong-Su; Kim, Youn-Kwon; Park, No-Suk

doi:10.4491/ksee.2017.39.5.229

Cited by 1 publication

(1 citation statement)

References 11 publications

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“…Some researchers have conducted empirical analyses by establishing functional relationships based on measured data (Feng et al, 2005;Shen et al, 2013). Others have used various rates to simulate the riverbed adjustment process based on observations (Hooke, 1995;Simon and Thorne, 1996;Kasai et al, 2004;Simon and Rinaldi, 2006;Choi et al, 2017) or applied artificial neural networks and mathematical models to perform relevant research (Li et al, 2010). Alluvial rivers are characterized by complex water-sediment variation processes and variable influencing factors, and the above methods can be used to study and understand the delayed response process; however, there are still difficulties in quantitatively describing the influence of previous water-sediment conditions and the corresponding delayed response behaviour.…”

Section: Introductionmentioning

confidence: 99%

Impact of cascade reservoirs on the delayed response behaviour of sedimentation in the Three Gorges Reservoir

Ren

et al. 2023

J. Geogr. Sci.

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Delayed response behaviour commonly occurs in conjunction with changes in riverbed scouring and sediment deposition and is a key component in understanding the intrinsic behaviour of reservoir siltation. Due to the complexity of the riverbed siltation process, the variability in the factors that influence siltation and the limitations of available research methods, the understanding of the delayed response behaviour of the sedimentation process in the Three Gorges Reservoir (TGR) is currently merely qualitative, and there is a lack of quantitative in-depth understanding. In addition, the effects of changes in water and sediment conditions on sedimentation in the TGR before and after cascade reservoir impoundment have not been quantified, so further studies are needed to provide a reference for better understanding the intrinsic behaviour of sedimentation in the TGR and the implications for the long-term use of the reservoir. Based on measured water and sediment data from 2003 to 2020 and topographic data from 2003 to 2018, a delayed response model for sedimentation in the TGR is constructed and combined with theoretical derivation to analyse the changes in the delayed response behaviour of the TGR before and after the impoundment of the cascade reservoirs and the associated causes. Then, the influence of changes in water and sediment conditions in previous years on sedimentation in the reservoir area is determined. The results show that (1) the improved delayed response model of sedimentation, which considers variations in external water and sediment conditions, reservoir scheduling, and riverbed adjustment rates, can effectively reflect the sedimentation process in the TGR, especially after the impoundment of the cascade reservoirs. Additionally, the typical section elevation delayed response model can simulate the section elevation adjustment process. (2) After the impoundment of the cascade reservoirs, the decreased variation in incoming water and sediment and more concentrated incoming sediment in the flood season increased the adjustment rate of the riverbed, and the delayed response time of TGR sedimentation was short-

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Section: Introductionmentioning

confidence: 99%

Impact of cascade reservoirs on the delayed response behaviour of sedimentation in the Three Gorges Reservoir

Ren

et al. 2023

J. Geogr. Sci.

View full text Add to dashboard Cite

show abstract

A Study on Prediction of Sedimentation Efficiency for Sedimentation Basin using Lagrangian Method

Cited by 1 publication

References 11 publications

Impact of cascade reservoirs on the delayed response behaviour of sedimentation in the Three Gorges Reservoir

Impact of cascade reservoirs on the delayed response behaviour of sedimentation in the Three Gorges Reservoir

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