Quantifying the protective capacity of mangroves from storm surges in coastal Bangladesh

Dasgupta, Susmita; Islam, Md. Saiful; Huq, Mainul; Khan, Zahirul Haque; Hasib, Md. Raqubul

doi:10.1371/journal.pone.0214079

Cited by 72 publications

(47 citation statements)

References 42 publications

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“…Damage resistance in mangrove species conditions can produce velocities around 0.5-0.7 m s À1 (Fig. 7; Roeber and Bricker 2015;Dasgupta et al 2019). Despite the low flow conditions, the tests are still informative about the drag coefficient, which is known to be reasonably constant when the Reynolds number is above 1000 (2500 in our test; Hu et al 2014;Chen et al 2018).…”

Section: Drag Properties Of Mangrove Branchesmentioning

confidence: 81%

Analysis of coastal storm damage resistance in successional mangrove species

Hespen

Peng

et al. 2021

Limnology & Oceanography

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Use of mangrove ecosystems for coastal flood protection requires reliable predictions of mangrove wave attenuation, especially if this capacity lessens due to storm-induced forest damage. Quantifying and understanding the variation in drag forces and mechanical properties of mangrove vegetation can improve assessment of mangrove protective capacity. We studied five mangrove species common in the subtropical Pearl River Delta, south China. The studied species range from typically landward-occurring to more seaward-occurring pioneer species. We sampled across seven sites in the delta to study the impact of salinity on mechanical properties. We quantified strength and flexibility of branches (branch strength and flexibility related to branch diameter, modulus of rupture and modulus of elasticity), leaf strength (leaf attachment strength related to leaf size, and leaf mass per area) and drag properties (drag force related to surface area and drag coefficient). For all tested species, larger branch diameters resulted in higher mechanical strength. Larger leaf size resulted in larger peak pulling forces and larger branch surface area resulted in stronger drag forces. Notably, species that generally occur lower in the intertidal zone, where exposure to wind and waves is higher, had relatively stronger branches but more easily detachable leaves. This may be regarded as a damage-avoiding strategy. Across the seven field sites, we found no clear effect of salinity on mangrove mechanical properties. This study provides a mechanistic insight in the storm damage process for individual mangrove trees and a solid base for modeling storm (surge) damage at the forest scale.

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Section: Drag Properties Of Mangrove Branchesmentioning

confidence: 81%

Analysis of coastal storm damage resistance in successional mangrove species

Hespen

Peng

et al. 2021

Limnology & Oceanography

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“…A study for the United Kingdom showed that fronting protective structures with coastal wetlands significantly lowered seawall requirements and resulted in subsequent savings in construction costs (Mangi et al, 2011). Such a combination of "green" and "gray" infrastructure may be the most effective way of protecting vulnerable coasts from the variability of sea level rise, increased frequency and intensity of storms, and the risks of climate change (Mangi et al, 2011;Arkema et al, 2013;Barbier, 2014;Sandilyan and Kathiresan, 2015;World Bank, 2016;Dasgupta et al, 2019;Liu et al, 2019).…”

Section: Economic Valuation Methodsmentioning

confidence: 99%

“…Equally, the strength and duration of the storm, and the presence of high or low tides, can impact wave attenuation by ECEs significantly (Koch et al, 2009;Loder et al, 2009;Wamsley et al, 2010;Barbier et al, 2011). Only recently are valuation studies taking into account spatial and temporal variability of wave attenuation by ECEs in estimating their potential protective value (Barbier et al, 2008;Barbier, 2012;Dasgupta et al, 2019;Hochard et al, 2019).…”

Section: Spatial Variabilitymentioning

confidence: 99%

“…It is now well-documented that many of these habitats provide such protection (Koch et al, 2009;Loder et al, 2009;Wamsley et al, 2010;Gedan et al, 2011;Paul et al, 2012;Armitage et al, 2019). These include specific studies of marshes (Shepard et al, 2011;Rupprecht et al, 2017), mangroves (Cochard et al, 2008;Zhang et al, 2012;Dasgupta et al, 2019;Montgomery et al, 2019), near-shore coral reefs (Ferrario et al, 2014;Reguero et al, 2018) and seagrass beds (Paul et al, 2012;Christianen et al, 2013;Ondiviela et al, 2014). This protective value of ECEs is increasingly used to justify coastal conservation and restoration efforts worldwide (Temmerman et al, 2012;Arkema et al, 2013;Duarte et al, 2013;Barbier, 2014;Elliott et al, 2016;Narayan et al, 2016;Ruckelshaus et al, 2016;Hochard et al, 2019;Menéndez et al, 2020;Newton et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Estuarine and Coastal Ecosystems as Defense Against Flood Damages: An Economic Perspective

Barbier

2020

Front. Clim.

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The rapid loss of estuarine and coastal ecosystems (ECEs) in recent years has raised concerns over their role in protecting coastal communities from storms that damage property, cause deaths, and inflict injuries. This paper reviews valuation studies of the protective service of ECEs in terms of reducing flood damages. Although the number of studies have grown significantly, there is still a need for a greater range of studies in more locations and for a wider variety of ecosystems. This review also examines, from an economic perspective, the issues and challenges surrounding estimating the protective benefits of ECEs, as exemplified by some of the recent valuation studies. Recent developments in valuation methods are summarized and critically reviewed. Important challenges remain in valuing coastal ecosystems as a defense against flood damages. The review discusses two of them, such as how protective benefits are subject to spatial variability and dependent on connectivity across “seascapes.” These challenges, along with analyzing the multiple benefits of estuarine and coastal ecosystems, are important areas of future research priority.

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“…[19][20][21][22]. Mangroves provide (a) resources such as food, timber and fuel [4][5][6][7]; (b) shoreline protection [8][9][10]; (c) refuge and habitat for marine and coastal species in several life stages [11][12][13]; and (d) recreation and tourism opportunities [14][15][16]. Notwithstanding the importance of mangroves, they continue to be threatened by natural and anthropogenic pressures.…”

Section: Introductionmentioning

confidence: 99%

Using Historical Archives and Landsat Imagery to Explore Changes in the Mangrove Cover of Peninsular Malaysia between 1853 and 2018

et al. 2021

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Archive records such as maps, journals, books, sketches, cadastre and notarial documents have been underutilised in describing past and present changes in ecological systems, such as mangrove forests. Historical records can be invaluable information sources for baseline establishment, to undertake long-term study on mangrove dynamics and enhance the historical land cover and land-use dynamics of a country. In this study, we explore these untapped information reservoirs, used complementarily with remote sensing techniques, to explain the dynamics of the mangrove systems in Peninsular Malaysia. The archives in the United Kingdom, the Netherlands, Malaysia and Singapore were explored and mined for related information on the mangrove systems in Peninsular Malaysia from past centuries. Most historical records found in this study were used to validate the mangrove presence in Peninsular Malaysia since 1853 while two records from 1944 and 1954 were used to quantify the mangrove cover extent. A significant finding of this study was the oldest record found in 1853 that attested to the presence of a mangrove system on the mainland Penang of Peninsular Malaysia which was not identified again as such in records post-1853. Remote sensing data, specifically Landsat images, were used to determine the mangrove extent in Peninsular Malaysia for the years 1988, 1992, 2002, 2012 and 2018. By complementing the historical records with remote sensing information, we were able to validate the mangrove presence in Peninsular Malaysia since 1853 and determine the gain/loss of mangrove systems over the last 74 years. Peninsular Malaysia has lost over 400 km2 of mangrove forests, equivalent to 31% of its original extent between 1944 and 2018. This is a significant loss for Peninsular Malaysia which has less than 1% mangrove cover of its total land area presently.

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Quantifying the protective capacity of mangroves from storm surges in coastal Bangladesh

Cited by 72 publications

References 42 publications

Analysis of coastal storm damage resistance in successional mangrove species

Analysis of coastal storm damage resistance in successional mangrove species

Estuarine and Coastal Ecosystems as Defense Against Flood Damages: An Economic Perspective

Using Historical Archives and Landsat Imagery to Explore Changes in the Mangrove Cover of Peninsular Malaysia between 1853 and 2018

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