Assessment of Coastal Vulnerability Due to Sea Level Change at Bhola Island, Bangladesh: Using Geospatial Techniques

Islam, Md. Ashraful; Hossain, Md. Shakhawat; Murshed, Sanzida

doi:10.1007/s12524-014-0426-0

Cited by 53 publications

(29 citation statements)

References 19 publications

(30 reference statements)

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“…Often, the vulnerability metrics were derived from proxy measures or reflected general knowledge (e.g., assuming that coastal areas are more vulnerable because they are on the coast or that urban areas are more populated and therefore have higher exposure). For example, Islam et al [100] incorporated population density in the Coastal Vulnerability Index (CVI) as reflective of socioeconomic impacts, under the assumption that higher exposure signifies higher vulnerability. It appears that authors often did not fully account for socioeconomic information due to challenges with turning them into quantified values that could be mapped or integrated into an overall vulnerability ranking.…”

Section: Vulnerability Frameworkmentioning

confidence: 99%

A Systematic Review of Coastal Vulnerability Mapping

et al. 2020

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Coastal areas worldwide represent an aggregation of population and assets of growing economic, geopolitical, and sociocultural significance, yet their functions are increasingly challenged by worsening coastal hazards. Vulnerability assessments have been recognized as one way we can better understand which geographic areas and segments of society are more susceptible to adverse impacts from different stressors or hazards. The aims of this paper are to evaluate the state of coastal vulnerability assessment mapping efforts and to identify opportunities for advancement and refinement that will lead to more cohesive, impactful, and policy-relevant coastal vulnerability studies. We conducted a systematic review of the literature that addresses physical and social vulnerability to coastal hazards and contains corresponding mapping products. The content was analyzed for the scale of analysis, location, disciplinary focus, conceptual framework, metrics used, methodological approach, data sources, mapping output, and policy relevance. Results showed that most Coastal Vulnerability Mapping Assessments (CVMAs) are conducted at the local level using a range of methodologies, often with limited inclusion of social considerations and limited discussion of policy relevance. Based on our analysis, we provide seven recommendations for the advancement of this field that would improve CVMAs’ methodological rigor, policy relevance, and alignment with other vulnerability assessment paradigms.

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Section: Vulnerability Frameworkmentioning

confidence: 99%

A Systematic Review of Coastal Vulnerability Mapping

et al. 2020

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“…Satellite images from Thematic Mapper (TM) and Enhanced Thematic Mapper (ETM) were used to quantify the spatiotemporal changes that took place in the coastal zone of Hatiya Island during the specified period. Besides, Islam et al [26] developed a coastal vulnerability index (CVI) using eight parameters namely (a) geomorphology, (b) slope, (c) relative sea level change rate, (d) mean tide range (e) shoreline erosion and accretion, (f) population (g) bathymetry and (h) coastal flooding which were addressed as the relative risk variable for the study area using geospatial techniques i.e., Remote Sensing and GIS.…”

Section: Introductionmentioning

confidence: 99%

Monitoring Coastline Changes in the Coastal Belt of Chittagong in Bangladesh Using GIS and Remote Sensing

Khan¹,

Das²,

Kabir³

2019

AJGR

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Coastal zones are the most dynamic feature of earth surface in which lithosphere, hydrosphere and atmosphere gets into contact with each other. Such dynamic process should be monitored with great importance as a large portion of the world’s population is living along the coastal zones. This paper focuses on delineation of the changes in the coastal land areas of Chittagong in Bangladesh through the shifting of coastline. Chittagong coastal area is around 245 km with an unbroken 125 km gently slopped sandy sea beach in Cox’s Bazar. However, due to both the natural phenomenon and human interventions, coastline in these areas has been changing gradually. These changes have occurred in relation to land biomass, erosion and accretion rate. Therefore, shoreline geometry analysis can help understand such dynamic coastal process. Several satellite images from Thematic Mapper (TM) and Enhanced Thematic Mapper (ETM) were used for the long term coastline change analysis. The digital shoreline analysis (DSA) using ArcGIS 10.1, and image rectification, atmospheric correction, edge separation techniques between earth surface and water surface using ENVI software were used in this analysis. DSAS was used as a reliable statistical approach for the rate of coastline change. The result shows that changes in dynamic changes due to erosion and accretion have been impacting the morph-dynamics in the study area. The maximum accession rate was 3.6 km and 1.9 km at different section points and on the contrary the maximum erosion at several section points was 0.37 km and 3.3 km at the time interval of 1989 to 2009 and 2009 to 2014, respectively. Overall, it was found that the area was affected with huge rate of accretion and increase in the landmass of the Chittagong area till the year 2009 but later on till the date of 2014 the erosion rate of the area again increased. The findings of this study can help policy makers to make decisions in delineating new islands emerging at the sea boundary of Bangladesh and planning for better coastal management.

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“…Shoreline change is the major issues in deltaic region in all over the world (Nandi et al 2016) and thus the issue has become a major concern to the researchers (Mills et al 2005;Morton et al 2005;Mujabar & Chandrasekar 2013;Ryabchuk et al 2012). Bangladesh is known as a low lying deltaic country (Shibly and Takewaka 2012) which is one of the most climate vulnerable countries in the world because of global warming and sea level rising (Brammer 2014;Choudhury et al 1997;Islam et al 2015;Khan 2013;Singh 2002). Bangladesh is at extreme risk of floods, tropical cyclones, sea level rise and drought (Karim and Mimura 2008) as the recent air temperature is increasing twice faster than the twentieth centuries (Brammer 2014;Estrada et al 2013) and average sea level has risen by 3.2 mm/year (IPCC 2013) all of which could bound millions of people to migrate (IPCC 2014).…”

Section: Introductionmentioning

confidence: 99%

Modeling Spatio-Temporal Shoreline Shifting of a Coastal Island in Bangladesh Using Geospatial Techniques and DSAS Extension

Salauddin

Hossain

Tanim

et al. 2018

Annals of Valahia University of Targoviste, Geographical Series

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The study attempted to assess the changes in shoreline and erosion-accretion of newly formed island at the mouth of the Meghna river estuary in Bangladesh using multi temporal satellite images and GIS techniques. The current study used NDWI an MNDWI to delineate land and water boundary to extract the shoreline and also used some overlay analysis to measure the erosion-accretion. DSAS extension is used for analyzing the shifting of the shoreline. The results (1990-2015) show that the island has 1192 hectares of land accreted during this time period, and about 1 km of its shoreline lost during this time period as it has broken in few places. Most accretion found in the northwestern part and erosion in southeastern and southwestern part. The study area was divided into four different segments and about 115 transects were constructed, of which about 74 shows the seaward movement and 44 shows landward movement. Seaward movement and rate of shoreline shifting is higher in the northwestern part where net shoreline movement (NSM) is +1897 meters and end point rate (EPR) is +73 m/year. Landward movement and the rate of shoreline shifting are higher in southeastern and southwestern part of which net shoreline movement (NSM) is about -2680 meters and end point rate (EPR) is about -129 m/year. The highest landward movement is found as -2680 meters and highest seaward movement as +1897 meters. Accretion process is dominant while erosion process discontinued the shoreline in some places.

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Assessment of Coastal Vulnerability Due to Sea Level Change at Bhola Island, Bangladesh: Using Geospatial Techniques

Cited by 53 publications

References 19 publications

A Systematic Review of Coastal Vulnerability Mapping

A Systematic Review of Coastal Vulnerability Mapping

Monitoring Coastline Changes in the Coastal Belt of Chittagong in Bangladesh Using GIS and Remote Sensing

Modeling Spatio-Temporal Shoreline Shifting of a Coastal Island in Bangladesh Using Geospatial Techniques and DSAS Extension

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