Dégradation des Dunes côtières algéroises entre pression de l'urbanisation et consequesces sur l'evolution de la ligne de rivage

Otmani, Housseyn; Belkessa, Rabah; Rabehi, Walid; Guerfi, Mokhtar; Boukhdiche, Walid

doi:10.5281/zenodo.3609777

Cited by 2 publications

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“…The population's concentration along the coast makes them more vulnerable to another type of ooding not addressed in this study, marine submersion. Algiers' coastal zone is the epicenter of numerous environmental, economic, and anthropogenic issues that have disastrous consequences for the balance of coastal systems, such as the loss of coastal dunes (Otmani et al 2019). Despite the presence of a regulatory framework since 2002 (Law 02-02) limiting and specifying the activities that can take place in this fragile area, this zone is under signi cant human pressure.…”

Section: Results Validationmentioning

confidence: 99%

Flooding vulnerability in Algiers (Algeria): an analytic hierarchy process

Ziadi,

Keraghel

2024

Nat Hazards

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Flooding is the second most serious hazard in Algeria, after earthquakes. According to the Civil Protection Services census, the department of Algiers experienced 174 oods between 1946 and 2021, several devastating oods. This study examines Algiers' vulnerability to ooding using the Hierarchical Multicriteria Analysis (AHP) method, which aggregates eight criteria: altitude distribution, slopes, drainage density, topographic wetness index, land cover and land use, normalized difference vegetation index, soil types, and precipitations. With an accuracy of 85%, the resulting vulnerability map is an essential tool for better risk and land use management. The municipalities most vulnerable to ooding are located in the Mitidja (east of Algiers) and Algiers' Western Sahel. These areas cover 71.29 km 2 (10% of Algiers' area) and are primarily located in the watersheds of El Harrach, El Hamiz, and Reghaia, while 25.8% of urbanized areas are moderately vulnerable. However, these areas require special attention because of their high population density. Flood risk has undeniably become more frequent and intense due to Algiers' signi cant and often anarchic increase in urbanization in recent years, particularly at the edge of the major Wadis beds (nearly half of their watershed area is urbanized). This trend will worsen as extreme weather events increase, necessitating a stricter application of land use planning regulations and prevention, adaptation, and mitigation measures.

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Section: Results Validationmentioning

confidence: 99%

Flooding vulnerability in Algiers (Algeria): an analytic hierarchy process

Ziadi,

Keraghel

2024

Nat Hazards

View full text Add to dashboard Cite

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Flooding vulnerability in Algiers (Algeria): An Analytic Hierarchy Process

ZIADI,

KERAGHEL

2023

Preprint

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Flooding is the second most serious hazard in Algeria, after earthquakes. According to the Civil Protection Services census, the department of Algiers experienced 174 floods between 1946 and 2021, several devastating floods. This study examines Algiers’ vulnerability to flooding using the Hierarchical Multicriteria Analysis (AHP) method, which aggregates eight criteria: altitude distribution, slopes, drainage density, topographic wetness index, land cover and land use, normalized difference vegetation index, soil types, and precipitations. With an accuracy of 85%, the resulting vulnerability map is an essential tool for better risk and land use management. The municipalities most vulnerable to flooding are located in the Mitidja (east of Algiers) and Algiers’ Western Sahel. These areas cover 71.29 km2 (10% of Algiers’ area) and are primarily located in the watersheds of El Harrach, El Hamiz, and Reghaia, while 25.8% of urbanized areas are moderately vulnerable. However, these areas require special attention because of their high population density. Flood risk has undeniably become more frequent and intense due to Algiers’ significant and often anarchic increase in urbanization in recent years, particularly at the edge of the major Wadis beds (nearly half of their watershed area is urbanized). This trend will worsen as extreme weather events increase, necessitating a stricter application of land use planning regulations and prevention, adaptation, and mitigation measures.

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Dégradation des Dunes côtières algéroises entre pression de l'urbanisation et consequesces sur l'evolution de la ligne de rivage

Cited by 2 publications

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Flooding vulnerability in Algiers (Algeria): an analytic hierarchy process

Flooding vulnerability in Algiers (Algeria): an analytic hierarchy process

Flooding vulnerability in Algiers (Algeria): An Analytic Hierarchy Process

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