Coastal vulnerability assessment based on multi-hazards and bio-geophysical parameters. case study - northwestern coastline of Guinea-Bissau

Lopes, Namir Domingos Raimundo; Li, Tianxin; Matomela, Nametso; Sá, Rui M.

doi:10.1007/s11069-022-05420-w

Cited by 5 publications

(3 citation statements)

References 46 publications

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“…Our current finding is consistent with the previous studies. For instance, Lopes et al 16 developed a coastal vulnerability index for the Guinea-Bissau coast, revealing that 52% of the 87 km coastline has high to very high vulnerability, 20% is moderately vulnerable, and 28% is low to very low. Further, Lopes et al 16 observed a rate of 8.79 mm/yr sea level rise in Guinea Bissau.…”

Section: Discussionmentioning

confidence: 99%

“…For instance, Lopes et al 16 developed a coastal vulnerability index for the Guinea-Bissau coast, revealing that 52% of the 87 km coastline has high to very high vulnerability, 20% is moderately vulnerable, and 28% is low to very low. Further, Lopes et al 16 observed a rate of 8.79 mm/yr sea level rise in Guinea Bissau. This value, however, may be too high because it was derived using a linear regression fit of 12 data points (one every year) at a single tide gauge, with an R 2 value of 0.023.…”

Section: Discussionmentioning

confidence: 99%

“…Thus, to mitigate the effects of rising seas, it will be necessary to simultaneously address multiple causes of coastal hazards. However, no multi-hazard study has assessed the vulnerability index status of the entire WA coast, considering bio-geophysical factors like natural geomorphology, historical shoreline change, coastal slope, wave, tidal range, and sea level rise 15 , 16 . Therefore, the present study aims to create a comprehensive coastal vulnerability index and identify the population exposed on the WA coast.…”

Section: Introductionmentioning

confidence: 99%

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Coastal vulnerability assessment of the West African coast to flooding and erosion

Dada,

Almar,

Morand

2024

Sci Rep

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Global coastal areas are at risk due to geomorphological issues, climate change-induced sea-level rise, and increasing human population, settlements, and socioeconomic activities. Here, the study examines the vulnerability of the West African (WA) coast using six satellite-derived geophysical variables and two key socioeconomic parameters as indicators of coastal vulnerability index (CVI). These geophysical and socioeconomic variables are integrated to develop a CVI for the WA coast. Then, the regional hotspots of vulnerability with the main indicators that could influence how the WA coast behaves and can be managed are identified. The results indicate that 64, 17 and 19% of WA coastal areas had high to very high CVI, moderate CVI, and low to very low CVI, respectively. The study reveals that while geophysical variables contribute to coastal vulnerability in WA, socioeconomic factors, particularly high population growth and unsustainable human development at the coast, play a considerably larger role. Some sections of the WA coast are more vulnerable and exposed than others, particularly those in the region's northwestern and Gulf of Guinea regions. Climate change and human presence may amplify the vulnerability in these vulnerable areas in the future. Hence, future coastal economic development plans should be based on a deep understanding of local natural conditions, resource status, and geophysical parameters to prevent negative coastal ecosystem transformation. It is also essential to establish a coastal management plan that would facilitate the development of desired actions and stimulate sustainable management of West African coastal areas.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Coastal vulnerability assessment of the West African coast to flooding and erosion

Dada,

Almar,

Morand

2024

Sci Rep

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Drifting Away from the Roots: Genderfluidity as Diola’s Mangrove Fishing Strategies in Three Island-Villages of Northern Guinea-Bissau

Keleman,

Sá,

Temudo

2024

Hum Ecol

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Biodiversity loss, habitat degradation, globalization, and societal transformations are challenging rural, and especially coastal communities in Guinea-Bissau where mangrove-dependent livelihoods are exposed to increased vulnerability. The Diola, traditional farmer-fishermen of the northern island-villages, have witnessed swift societal changes following the country’s economic liberalization, climate change, and youth migration from rural areas. Despite historically being a secondary subsistence activity with more predefined gender roles rooted in tradition, mangrove fishing has become a major source of cash income. Yet, women’s mangrove fishing contributions are still overlooked, resulting in general assumptions of static female fishing identities with limited control over their income. We present three case studies of Diola women’s involvement in mangrove fishing through a mixed method approach that combines qualitative techniques and household surveys conducted between 2017 and 2023. Specifically, we explore: (1) diverging societal coping strategies and livelihood developments in three Diola villages; (2) the primary drivers behind village-specific societal transformations; (3) social dynamics and female roles in mangrove fishing-related activities and village decision-making; and (4) the political ecology of interventions. Our findings underscore the complexity of gender-fluid small-scale fishing strategies as female roles beyond fish trade defy cultural generalizations. Contemporary Diola women make autonomous personal and work choices that meet their current needs and add to their household budget to face new welfare demands. Inclusive resource governance needs more gender-specific data for meaningfully implemented interventions adapted to local circumstances, enabling an active participation of all genders in conservation practices and development.

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An integrated approach to the spatial distribution of the coastal infrastructure vulnerability by using coastal vulnerability index and hot spot analysis: a case study of Kusadasi-Selcuk

Kuleli,

Bayazit

2024

Nat Hazards

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In this study, a new methodology integrating spatial coastal vulnerability index (CVI) and hot spot analysis was proposed for a comprehensive and holistic coastal infrastructure (natural, built-up and socioeconomic) vulnerability assessment and determination of its spatial distribution. The Selçuk-Kuşadası coastal region, which is located on the Aegean coast of Turkey, was chosen as the case study area. For calculation spatial CVI, eight physical variables (geomorphology, coastal slope, relief, mean seal level, mean tide range, mean wave high, shoreline erosion and accretion) were used. Spatial CVI analyses were performed using basic methods of geographical information systems. CVI results were classified as 1 to 5 across the study area. The spatial distribution of vulnerabilities of coastal infrastructures has statistically tested with hotspot analysis. In conclusion; over 55% of infrastructure falls within high or very high vulnerability classes. It is seen that 57% of the infrastructure in the build-up category, 59% of the natural environment, and more than 42% of the socio-economic infrastructure are located in areas falling into the high or very high vulnerability classes. Additionally, $1.1 billion worth of land assets and a population of approximately 143.000 people are located in areas that fall into the high or very high vulnerability classes. Statistically significant clusters of high vulnerability for historical sites, tourism, roads, land value, population density, and urban areas were determined by hot spot analysis. According to the results of the developed integrated method, suggestions were presented for the preparation of coastal infrastructure vulnerability adaptation strategies.

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Coastal vulnerability assessment based on multi-hazards and bio-geophysical parameters. case study - northwestern coastline of Guinea-Bissau

Cited by 5 publications

References 46 publications

Coastal vulnerability assessment of the West African coast to flooding and erosion

Coastal vulnerability assessment of the West African coast to flooding and erosion

Drifting Away from the Roots: Genderfluidity as Diola’s Mangrove Fishing Strategies in Three Island-Villages of Northern Guinea-Bissau

An integrated approach to the spatial distribution of the coastal infrastructure vulnerability by using coastal vulnerability index and hot spot analysis: a case study of Kusadasi-Selcuk

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