| Titre : |
Étude de l'évolution du trait de côte dans la région Est de la baie de Bou-Ismail, recours à l'imagerie satellitaire |
| Type de document : |
texte imprimé |
| Auteurs : |
Khaled Keddache, Auteur ; R Belkessa, Auteur |
| Editeur : |
Tipaza [Algérie] : Centre universitaire Morsli Abdellah - Tipaza- |
| Année de publication : |
2024/2025 |
| Importance : |
p.46 |
| Présentation : |
couv. en noir et blanc ., ill., fig.,tabl. |
| Format : |
30 cm |
| Accompagnement : |
CD |
| Note générale : |
Bibliographie: p44-46. |
| Langues : |
Français (fre) |
| Catégories : |
Hydrobiologie
|
| Mots-clés : |
Shoreline ArcGIS DSAS Erosion Accretion Coastal zone. |
| Index. décimale : |
551.27 |
| Résumé : |
The evolution of the shoreline has been studied in Algeria for years due to growing concerns related to the protection of coastal areas, urban planning management along the coast, and marine-related risks. This work focuses on the study of shoreline evolution in the eastern part of the Bay of Bou-Ismail (a sandy coast), located about forty kilometers west of Algiers. This coastal area, which holds significant socio-economic and touristic importance, has been subject to substantial natural and human pressures since the 1980s.
In this context, the main objective of this work is to monitor the shoreline changes over a 22-year period, from 2002 to 2024. A methodology based on diachronic analysis of satellite images from Google Earth Pro was applied. Data processing was carried out using a Geographic Information System (GIS) and the geostatistical analysis tool DSAS (Digital Shoreline Analysis System). These techniques allowed for the calculation of statistical indicators such as the End Point Rate (EPR) to quantify erosion and accretion rates, and to describe shoreline change trends over four periods (2002–2010, 2010–2020, 2020–2024, and 2002–2024).
The study shows that the area experienced accretion during the periods 2002–2010 and 2010–2020, with average EPR values of 1.05 m/year and 1.04 m/year, particularly near protective structures, indicating partial shoreline stabilization. However, the 2020–2024 period saw strong erosion across the study area, with an average EPR of -1.83 m/year.
This evolution is explained by a combination of several factors, both natural and human-induced: the decrease in sediment supply from the Mazafran watershed, sediment transport caused by coastal currents, climate change (reduced precipitation, stronger winds), and the impact of coastal development and protective structures.
These findings highlight the need for continuous monitoring and an integrated coastal management approach to prevent future coastal risks.
|
Étude de l'évolution du trait de côte dans la région Est de la baie de Bou-Ismail, recours à l'imagerie satellitaire [texte imprimé] / Khaled Keddache, Auteur ; R Belkessa, Auteur . - Tipaza [Algérie] : Centre universitaire Morsli Abdellah - Tipaza-, 2024/2025 . - p.46 : couv. en noir et blanc ., ill., fig.,tabl. ; 30 cm + CD. Bibliographie: p44-46. Langues : Français ( fre)
| Catégories : |
Hydrobiologie
|
| Mots-clés : |
Shoreline ArcGIS DSAS Erosion Accretion Coastal zone. |
| Index. décimale : |
551.27 |
| Résumé : |
The evolution of the shoreline has been studied in Algeria for years due to growing concerns related to the protection of coastal areas, urban planning management along the coast, and marine-related risks. This work focuses on the study of shoreline evolution in the eastern part of the Bay of Bou-Ismail (a sandy coast), located about forty kilometers west of Algiers. This coastal area, which holds significant socio-economic and touristic importance, has been subject to substantial natural and human pressures since the 1980s.
In this context, the main objective of this work is to monitor the shoreline changes over a 22-year period, from 2002 to 2024. A methodology based on diachronic analysis of satellite images from Google Earth Pro was applied. Data processing was carried out using a Geographic Information System (GIS) and the geostatistical analysis tool DSAS (Digital Shoreline Analysis System). These techniques allowed for the calculation of statistical indicators such as the End Point Rate (EPR) to quantify erosion and accretion rates, and to describe shoreline change trends over four periods (2002–2010, 2010–2020, 2020–2024, and 2002–2024).
The study shows that the area experienced accretion during the periods 2002–2010 and 2010–2020, with average EPR values of 1.05 m/year and 1.04 m/year, particularly near protective structures, indicating partial shoreline stabilization. However, the 2020–2024 period saw strong erosion across the study area, with an average EPR of -1.83 m/year.
This evolution is explained by a combination of several factors, both natural and human-induced: the decrease in sediment supply from the Mazafran watershed, sediment transport caused by coastal currents, climate change (reduced precipitation, stronger winds), and the impact of coastal development and protective structures.
These findings highlight the need for continuous monitoring and an integrated coastal management approach to prevent future coastal risks.
|
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551.01 
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