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A review and meta-analysis of remote sensing data, GIS methods, materials and indices used for monitoring the coastline evolution over the last twenty years
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The current review study focuses on a statistical analysis (Meta-analysis) of the most common methods, materials, software, and indices used by researchers over the last twenty years to evaluate and quantify the shoreline evolution. Furthermore, this review targets to highlight some critical points through studied literature such as a) the low rate of high-resolution satellite images usage in a subject where the accuracy is prerequisite, b) the effort to derive information from Landsat images in order to take advantage of the 50-years archive and the freely availability c) the impulse of the UAV during the last 5 years as an alternative low cost but high accurate source of data d) the fact that only 50% of the coastal erosion studies are funded. One hundred thirty-eight papers and articles have been analyzed in detail by the authors and all the key points (methods, materials, software, and indices) were sorted for further statistical analysis. This study is not intended to criticize neither the methods nor the results being mentioned in the previous studies but to give the opportunity to the researchers (especially the new ones) to have an overall view of the subject for the last 20 years with just a glimpse.
The application of GIS and remote sensing in a spatiotemporal analysis of coastline retreat in Rufisque, Senegal
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This paper is aimed at analyzing the phenomenon of shoreline retreat in the locality of Rufisque from 1978 to 2018 mainly using geospatial data and field
visits. A set of Landsat images from different dates at 10 year intervals was then acquired through the United States Geological Survey platform and shoreline
change analysis was run using the Digital Shoreline Analysis System. In addition to that desktop work, interactions with local residents allowed the deter‑
mination of ongoing adaptation strategies actually in place to cope with coastal erosion. The study showed that Rufisque is subject to serious rates of erosion
reaching −19.48 m/year from 1978–1988, close to −8 m/year from 1988–1998, −5.88 m/year from 1998–2008 and −6.67 m/year from 2008–2018. Beside
that coastal erosion, it has been noticed that the coastline also experienced in some of its parts cases of accretion reaching 4.94 m/year for 1988–1998,
7.29 m/year from 1998–2008 and 7.68 m/year during the period 2008–2018. In terms of surfaces, Rufisque’ shoreline respectively lost 156.81 ha (1978–1988),
80.55 ha (1988–1998), 6.94 ha (1998–2008), 12.93 ha (2008–2018) and in the same note gained 2.86 ha (1988–1998), 32.51 ha (1998–2008) and 19.16 ha (2008–2018)
attesting to the fact that the coastline is subject to both spatiotemporal changes.
Finally, this study also reveals that while authorities’ reaction is taking place atmuch lower pace, local communities are actually using their ingenuity to put in
place strategies to tackle coastal erosion.
A review and meta-analysis of remote sensing data, GIS methods, materials and indices used for monitoring the coastline evolution over the last twenty years
- Auteur
- Ganias, Konstantinos
- Sujet
- Meta-analysis; GIS; Remote sensing; Coastal erosion
- Date_TXT
- 2021
- Type de document
- Article
The application of GIS and remote sensing in a spatiotemporal analysis of coastline retreat in Rufisque, Senegal
- Auteur
- Cheikh Tidiane Koulibaly, Johnson O. Ayoade
- Sujet
- Spatiotemporal change; Coastline; Erosion; Accretion; Adaptation; Rufisque
- Date_TXT
- 2021
- Type de document
- Article
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