Reservoir infill by hyperpycnal deltas over bedrock

Lai, Shiow-Suey; Capart, Hervé

doi:10.1029/2008gl037139

Cited by 37 publications

(38 citation statements)

References 21 publications

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“…In some cases, these have included dynamic basin characteristics like uplift or subsidence [ Swenson et al , ; Leva López et al , ] and relative variations of the basin water level [ Swenson et al , ; Capart et al , ; Parker et al , ]. Predictions have also been successfully compared with experiments [ Kim et al , , ; Hsu and Capart , ; Parker et al , ; Lai and Capart , ; Leva López et al , ].…”

Section: Introductionsupporting

confidence: 59%

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Theory for the curvature dependence of delta front progradation

Capart

2015

Geophysical Research Letters

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When Gilbert‐type deltas respond to uneven sediment supply or advance over irregular basin bathymetry, they develop curved, creased fronts prograding at speeds that vary with location along the shoreline. Relations governing the progradation rate, however, have so far been proposed only for simple special cases. In this paper, we exploit the special properties of solutions to the eikonal equation to derive a general progradation relation, applicable to delta fronts of finite angle of repose and arbitrary shoreline planform. In these circumstances, the theory explicitly relates the progradation rate to the local shoreline curvature. We illustrate the resulting morphodynamics with numerical and analytical solutions for a sinuous delta front. The proposed relation can be used to model deltaic evolution or deduce spanwise distributions of sediment supply rates from observations of foreset evolution.

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Section: Introductionsupporting

confidence: 59%

“…Here the brink, toe, and crease lines are all clearly delineated along the portion of the pool margin where sediment influx was active. Laboratory examples in various configurations are also documented in the literature [ Bromley , ; Hsu and Capart , ; Kim et al , , ; Lai and Capart , ; Leva López et al , ].…”

Section: Introductionmentioning

confidence: 99%

Theory for the curvature dependence of delta front progradation

Capart

2015

Geophysical Research Letters

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“…As in previous studies [ Lai and Capart , , ; Foreman et al , ], we assume the gravity flows in question are dominated by fine‐grained sediment that remains in suspension over the domain of interest. Due to the difficulties in keeping fine‐grained sediment suspended at reduced scale, we replaced the fine sediment in suspension with brine (specific gravity = 1.2) that, as a solute, does not settle on the bed.…”

Section: Methodsmentioning

confidence: 99%

“…Since we are unable to generate relief in a way that mimics these processes at laboratory scale, we instead created a simplified escarpment configuration that allowed for controlled increases in relief during the course of an experiment. And as is commonly done in reduced‐scale experimental studies on sustained sediment gravity flows, we used saline currents as a proxy for mud‐rich turbidity currents [ Métivier et al , ; Lai and Capart , , ; Weill et al , ]. By isolating two controls on slope morphology at reduced scale, we were able to explore their interaction in detail using high‐resolution topography and overhead photographic imagery.…”

Section: Introductionmentioning

confidence: 99%

An experimental approach to submarine canyon evolution

Lai

Gerber

Amblàs

2016

Geophysical Research Letters

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We present results from a sandbox experiment designed to investigate how sediment gravity flows form and shape submarine canyons. In the experiment, unconfined saline gravity flows were released onto an inclined sand bed bounded on the downstream end by a movable floor that was used to increase relief during the experiment. In areas unaffected by the flows, we observed featureless, angle‐of‐repose submarine slopes formed by retrogressive breaching processes. In contrast, areas influenced by gravity flows cascading across the shelf break were deeply incised by submarine canyons with well‐developed channel networks. Normalized canyon long profiles extracted from successive high‐resolution digital elevation models collapse to a single profile when referenced to the migrating shelf‐slope break, indicating self‐similar growth in the relief defined by the canyon and intercanyon profiles. Although our experimental approach is simple, the resulting canyon morphology and behavior appear similar in several important respects to that observed in the field.

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“…Furthermore, to predict the elevation variation along a reservoir, Lai and Capart [17] reported on different laboratory experiments constructed to reproduce reservoir delta movements. Their research figured out the variation of reservoir delta movement.…”

Section: Introductionmentioning

confidence: 99%

Physical Model-Based Investigation of Reservoir Sedimentation Processes

Huang

Lai

Lee

et al. 2018

Water

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Sedimentation is a serious problem in the operations of reservoirs. In Taiwan, the situation became worse after the Chi-Chi Earthquake recorded on 21 September 1999. The sediment trap efficiency in several regional reservoirs has been sharply increased, adversely affecting the operations on water supplies. According to the field record, the average annual sediment deposition observed in several regional reservoirs in Taiwan has been increased. For instance, the typhoon event recorded in 2008 at the Wushe Reservoir, Taiwan, produced a 3 m sediment deposit upstream of the dam. The remaining storage capacity in the Wushe Reservoir was reduced to 35.9% or a volume of 53.79 million m 3 for flood water detention in 2010. It is urgent that research should be conducted to understand the sediment movement in the Wushe Reservoir. In this study, a scale physical model was built to reproduce the flood flow through the reservoir, investigate the long-term depositional pattern, and evaluate sediment trap efficiency. This allows us to estimate the residual life of the reservoir by proposing a modification of Brune's method. It can be presented to predict the lifespan of Taiwan reservoirs due to higher applicability in both the physical model and the observed data.

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Reservoir infill by hyperpycnal deltas over bedrock

Cited by 37 publications

References 21 publications

Theory for the curvature dependence of delta front progradation

Theory for the curvature dependence of delta front progradation

An experimental approach to submarine canyon evolution

Physical Model-Based Investigation of Reservoir Sedimentation Processes

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