Climate-change impact assessment for inlet-interrupted coastlines

Ranasinghe, Roshanka; Duong, Trang Minh; Uhlenbrook, Stefan; Roelvink, Dano; Stive, M.J.F.

doi:10.1038/nclimate1664

Cited by 138 publications

(172 citation statements)

References 17 publications

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“…For detailed insights regarding the derivations of above four components in equation [1], readers are referred to [8]. Given the focal point of this study hinges on the significance of fluvial sediment supply in assessing future coastline changes, brief descriptions of the relevant methods adopted are presented herewith.…”

Section: Methodsmentioning

confidence: 99%

“…This lag in morphological response is estimated to be about 50% of the volume required by the corresponding forcing conditions [8]. These relationships can be expressed as the following:…”

Section: Basin Infilling Due To Sea-level Rise-induced Increase In Acmentioning

confidence: 99%

“…This manuscript presents a part of this study, which scrutinizes the significance of fluvial sediment supply in assessing future coastlines changes at small tidal inlets. Case studies used in SMIC applications [8] were used in this work as well, making it convenient to compare this model performances with that of relevant existing method(s). Therefore, this study focuses on coastline variations at CEC systems in Western Australia (Wilson Inlet and Swan River) and Vietnam (Tu Hien and Thuan An Inlets).…”

Section: Introductionmentioning

confidence: 99%

“…These four sites represent seasonally (Wilson), intermittently (Tu Hien), and permanently open (Swan River and Thuan An) inlet systems. They are also attributed with different basin and tidal prisms sizes and annual river flow volumes [8]. Compared to the present conditions, the catchments of Tu Hien and Thuan An inlet systems would generate larger river discharge volumes by 2100, whereas these volumes from the Wilson and Swan river systems are expected to be smaller [10].…”

Section: Introductionmentioning

confidence: 99%

“…The Scale-aggregated Model for Inlet-interrupted Coasts (SMIC) presented by [8] is the first of its kind that treats CEC systems in a holistic manner, while giving consideration to the description of physics governing each of the three components of the integrated systems. Although SMIC provides a solid platform to holistically probe into CEC systems, the highly-simplified method adopted in quantifying the fluvial sediment supply can be identified as its major drawback in accurately estimating the long-term behaviour of CEC systems under climate change and anthropogenic forcing.…”

Section: Introductionmentioning

confidence: 99%

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Significance of Fluvial Sediment Supply in Coastline Modelling at Tidal Inlets

Bamunawala

Maskey

Duong

et al. 2018

JMSE

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Abstract:The sediment budget associated with future coastline change in the vicinity of tidal inlets consists of four components; sea level rise-driven landward movement of the coastline (i.e., the Bruun effect), basin infilling effect due to sea level rise-induced increase in accommodation space, basin volume change due to variation in river discharge, and coastline change caused by change in fluvial sediment supply. These four components are affected by climate change and/or anthropogenic impacts. Despite this understanding, holistic modelling techniques that account for all the aforementioned processes under both climate change and anthropogenic influences are lacking. This manuscript presents the applications of a newly-developed reduced complexity modelling approach that accounts for both climate change and anthropogenically-driven impacts on future coastline changes. Modelled results corresponding to the year 2100 indicate considerable coastline recessions at Wilson Inlet (152 m) and the Swan River system (168 m) in Australia and Tu Hien Inlet (305 m) and Thuan An Inlet (148 m) in Vietnam. These results demonstrate that coastline models should incorporate both climate change and anthropogenic impacts to quantify future changes in fluvial sediment supply to coasts to achieve better estimates of total coastline changes at tidal inlets. Omission of these impacts is one of the major drawbacks in all the existing coastline models that simulate future coastline changes at tidal inlets. A comparison of these modelled future coastline changes with the predictions made by a relevant existing modelling technique (Scale Aggregated Model for Inlet-interrupted Coasts (SMIC)) indicates that the latter method overestimates total coastline recessions at the Swan River system, and the Tu Hien and Thuan An Inlets by 7%, 10%, and 30%, respectively, underlining the significance of integrating both climate change and anthropogenic impacts to assess future coastline changes at tidal inlets.

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Section: Methodsmentioning

confidence: 99%

“…This lag in morphological response is estimated to be about 50% of the volume required by the corresponding forcing conditions [8]. These relationships can be expressed as the following:…”

Section: Basin Infilling Due To Sea-level Rise-induced Increase In Acmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Significance of Fluvial Sediment Supply in Coastline Modelling at Tidal Inlets

Bamunawala

Maskey

Duong

et al. 2018

JMSE

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Sea level rise and its coastal impacts

2014

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Global warming in response to accumulation of human-induced greenhouse gases inside the atmosphere has already caused several visible consequences, among them increase of the Earth's mean temperature and ocean heat content, melting of glaciers, and loss of ice from the Greenland and Antarctica ice sheets. Ocean warming and land ice melt in turn are causing sea level to rise. Sea level rise and its impacts on coastal zones have become a question of growing interest in the scientific community, as well as in the media and public. In this review paper, we summarize the most up-to-date knowledge about sea level rise and its causes, highlighting the regional variability that superimposes the global mean rise. We also present sea level projections for the 21st century under different warming scenarios. We next address the issue of the sea level rise impacts. We question whether there is already observational evidence of coastal impacts of sea level rise and highlight the fact that results differ from one location to another. This suggests that the response of coastal systems to sea level rise is highly dependent on local natural and human settings. We finally show that in spite of remaining uncertainties about future sea levels and related impacts, it becomes possible to provide preliminary assessment of regional impacts of sea level rise.

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Toward homogenization of Mediterranean lagoons and their loss of hydrodiversity

Ferrarin

Bajo

Bellafiore

et al. 2014

Geophysical Research Letters

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Lagoons are considered to be the most valuable systems of the Mediterranean coastal area, with crucial ecological, historical, economical, and social relevance. Climate change strongly affects coastal areas and can deeply change the status of transitional areas like lagoons. Herein we investigate the hydrological response of 10 Mediterranean lagoons to climate change by means of numerical models. Our results suggest that Mediterranean lagoons amplify the salinity and temperature changes expected for the open sea. Moreover, numerical simulations indicate that there will be a general loss of intralagoon and interlagoon variability of their physical properties. Therefore, as a result of climate change, we see on Mediterranean lagoons an example of a common process that in future may effect many coastal environments: that of homogenization of the physical characteristics with a tendency toward marinization.

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Climate-change impact assessment for inlet-interrupted coastlines

Cited by 138 publications

References 17 publications

Significance of Fluvial Sediment Supply in Coastline Modelling at Tidal Inlets

Significance of Fluvial Sediment Supply in Coastline Modelling at Tidal Inlets

Sea level rise and its coastal impacts

Toward homogenization of Mediterranean lagoons and their loss of hydrodiversity

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