scholarly journals Diatom responses to long‐term climate and sea‐level rise at a low‐elevation lake in coastal British Columbia, Canada

Ecosphere ◽  
2019 ◽  
Vol 10 (9) ◽  
Author(s):  
Karen Neil ◽  
Terri Lacourse
Keyword(s):  
British Columbia ◽  
Sea Level Rise ◽  
Sea Level ◽  
Coastal British Columbia ◽  
And Sea Level

Long-term morphodynamics of a large estuary subject to decreasing sediment supply and sea level rise

2020 ◽  
Vol 191 ◽  
pp. 103212 ◽  
Author(s):  
Bing Yuan ◽  
Jian Sun ◽  
Binliang Lin ◽  
Fanyi Zhang
Keyword(s):  
Sea Level Rise ◽  
Sea Level ◽  
Sediment Supply ◽  
And Sea Level

Effect of decreasing sediment supply and sea level rise on the long-term morphodynamics of a large estuary

2021 ◽  
Author(s):  
Bing Yuan ◽  
Jian Sun ◽  
Binliang Lin ◽  
Fanyi Zhang
Keyword(s):  
Equilibrium State ◽  
Sea Level Rise ◽  
Sea Level ◽  
Yangtze Estuary ◽  
Sediment Supply ◽  
Bed Erosion ◽  
Adjustment Time ◽  
Riverine Sediment ◽  
And Sea Level

<p>Globally the riverine sediment supply to estuaries is decreasing and the mean sea level is rising, while the effects of these changes on the long-term estuarine morphodynamics have not been fully investigated. An idealized numerical model was used to explore the long-term morphodynamics of a large estuary subject to these changes. In the model, a funnel-shaped channel with fixed banks, constant riverine water and sediment fluxes, a single grain size and a semi-diurnal tide were used. A range of values of changes in the sediment supply (50-90% reduction) and sea level (1-5~mm/yr increase) were considered. Starting from an equilibrium state for an initial sediment supply, the estuary shifts to a new equilibrium for the considered changes on a timescale of millennia. Half of the bed level change occurs within several hundreds of years. A larger decrease in the sediment supply leads to a stronger bed erosion, while the corresponding adjustment time has minor changes in its range for the considered settings. When combined with sea level rise, the erosion is weakened and the adjustment time is shortened. The equilibrium state under sea level rise is characterized by a bed level keeping pace with the sea level and a significant amount of sediment being trapped in the estuary. Additional numerical experiments that use more realistic geometry and forcing of the Yangtze Estuary show that overall erosion of the estuary is expected for centuries.</p>

scholarly journals Estuarine Responses to Long‐Term Changes in Inlets, Morphology, and Sea Level Rise

2019 ◽  
Vol 124 (12) ◽  
pp. 9235-9257 ◽  
Author(s):  
Ryan P. Mulligan ◽  
David J. Mallinson ◽  
Gregory J. Clunies ◽  
Alexander Rey ◽  
Stephen J. Culver ◽  
...  
Keyword(s):  
Sea Level Rise ◽  
Sea Level ◽  
Long Term Changes ◽  
And Sea Level

Sustainability of a Tidal Freshwater Marsh Exposed to a Long-term Hydrologic Barrier and Sea Level Rise

2013 ◽  
Vol 36 (3) ◽  
pp. 585-594 ◽  
Author(s):  
P. Delgado ◽  
P. F. Hensel ◽  
C. W. Swarth ◽  
M. Ceroni ◽  
R. Boumans
Keyword(s):  
Sea Level Rise ◽  
Sea Level ◽  
Freshwater Marsh ◽  
Tidal Freshwater ◽  
Tidal Freshwater Marsh ◽  
And Sea Level

scholarly journals SEA-LEVEL EFFECT ON ANNUAL CYCLIC BEACH MORPHOLOGY IN SWASH ZONE AT HASAKI COAST

2018 ◽  
pp. 35
Author(s):  
Masayuki Banno ◽  
Yoshiaki Kuriyama
Keyword(s):  
Sea Level Rise ◽  
Sea Level ◽  
Observation Data ◽  
Swash Zone ◽  
Beach Profile ◽  
Beach Morphology ◽  
Bruun Rule ◽  
Decadal Scale ◽  
And Sea Level

depend on the accurate knowledge of the beach response to sea level regime on multi-time scale. For the long-term beach response, Bruun (1962) suggested that the equilibrium beach profile would move to new equilibrium profile in response to a rising sea level. In this concept called as Bruun rule, the upper part of the beach profile is eroded due to the sea level rise, resulting in the shoreline retreat. It is widely used for the future shoreline prediction. However, the Bruun rule predicts just only the final beach state with a constant wave impinging for an infinite period after sea level rise. On the other hand, simultaneous function of wave and sea level is more important on interannual to decadal-scale beach response. El niño in 2015 and 2016 increased wave energy and sea level, corresponding to large beach erosion across the US west coast (Barnard et al., 2017). Sea level influences the response sensitivity to the wave forcing as a subordinate factor on the morphological change. High water level anomalies made the beach more eroded even if the wave condition was equal. Beach morphology in the swash zone often changes on a 1-year cycle due to seasonal wave conditions. The effect of sea level on the annual cyclic beach morphology in swash zone is still unclear because long-term beach observation data required for the analysis are difficult to obtain. In this study, we investigated the simultaneous effects of the wave and sea level on annual cyclic beach morphology in the swash zone with spectrum analysis for 25-year Hasaki beach observation data.

Sign in / Sign up

Export Citation Format

Share Document