Analysis of coastal damage of a beach profile under the protection of emergent vegetation

Türker, Umut; Yağci, Oral; Kabdaşlı, M. Sedat

doi:10.1016/j.oceaneng.2005.04.019

Cited by 31 publications

(11 citation statements)

References 15 publications

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“…Vegetation promotes biodiversity, by creating different habitats and spatial heterogeneity in the stream velocity [32]. Finally, coastal marshes and mangroves provide coastal protection by damping waves and storm surge (e.g., [41,51,70]). Through the processes described above, aquatic vegetation provides ecosystem services with an estimated annual economic impact of over ten trillion dollars [9].…”

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confidence: 99%

Interaction between flow, transport and vegetation spatial structure

2008

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This paper summarizes recent advances in vegetation hydrodynamics and uses the new concepts to explore not only how vegetation impacts flow and transport, but also how flow feedbacks can influence vegetation spatial structure. Sparse and dense submerged canopies are defined based on the relative contribution of turbulent stress and canopy drag to the momentum balance. In sparse canopies turbulent stress remains elevated within the canopy and suspended sediment concentration is comparable to that in unvegetated regions. In dense canopies turbulent stress is reduced by canopy drag and suspended sediment concentration is also reduced. Further, for dense canopies, the length-scale of turbulence penetration into the canopy, δ e , is shown to predict both the roughness height and the displacement height of the overflow profile. In a second case study, the relation between flow speed and spatial structure of a seagrass meadow gives insight into the stability of different spatial structures, defined by the area fraction covered by vegetation. In the last case study, a momentum balance suggests that in natural channels the total resistance is set predominantly by the area fraction occupied by vegetation, called the blockage factor, with little direct dependence on the specific canopy morphology.

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confidence: 99%

Interaction between flow, transport and vegetation spatial structure

2008

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“…Vegetation clearance in turn increases erosion (Türker et al 2006) and contributes to waves reaching higher inland than previously, resulting in ''sea rising'' perception of environmental change among communities. Other actors along the shoreline, such as hotels, also contribute to change through their own adaptive measures as they deal with erosion and the aesthetics.…”

Section: Discussionmentioning

confidence: 99%

“…Furthermore, coastal vegetation functions to prevent excessive erosion by stabilizing beach sand (Avis 1989;Goudie and Viles 1997;Lubke 1985). Vegetation cover absorbs wave energy, which otherwise erodes the beach, and therefore causes a decrease in erosion and offshore sedimentation (Türker et al 2006). Vegetation also plays a role in beach development as sand accumulates on the lee of plants (Lubke 1985).…”

Section: Introductionmentioning

confidence: 99%

Understanding current and future vulnerability in coastal settings: community perceptions and preferences for adaptation in Zanzibar, Tanzania

et al. 2010

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Many developing countries are already affected by multiple stressors, which have increased their vulnerability to accelerated negative environmental change. Coastal erosion, deforestation and habitat fragmentation become even more serious problems in coastal locations when coupled with the projected impacts of climate change. However, anticipatory adaptation to such changes as increased coastal erosion and extreme events does not need to wait for specific climate scenarios, but is more reliant on the examination of current vulnerabilities and the range of possible no-regret strategies. These need to, however, accommodate multiple stakeholder preferences. This study therefore examines coastal communities' perceptions of environmental change in northeast Zanzibar, Tanzania and their preferences for adaptive strategies, while simultaneously examining physical change processes through change analysis. The study suggests coastal forest buffer zones as an anticipatory adaptation measure, which is based on soft measures such as vegetation planting, awareness raising and stakeholder cooperation.

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“…Möller (2006) assessed the effect of salicornia fields existing on the shores of United Kingdom on wave attenuation by conducting a field study. Turker et al (2006) showed by laboratory experiments that the cross shore erosion on a vegetated shoreline is smaller than the case of a bare sandy shore. Silva (2006) conducted an analytical and numerical study about the transformation of non-breaking waves through vertical porous cylinders and evaluated the effects of the cylinders mechanical properties and wave irregularity on wave transmission.…”

Section: Introductionmentioning

confidence: 98%