Flood Analysis and Mitigation Strategies in Algeria

Boutaghane, Hamouda; Boulmaiz, Tayeb; Lameche, El khansa; Lefkir, Abdelouahab; Hasbaia, Mahmoud; Abdelbaki, Chérifa; Moulahoum, Ahmed Walid; Keblouti, Mehdi; Bermad, Abdelmalek

doi:10.1007/978-981-16-2904-4_3

Cited by 10 publications

(5 citation statements)

References 42 publications

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“…In addition, the vulnerability maps for ooding and other natural hazards must be cross-checked to account for the above suggestions. A higher-resolution digital elevation model will better capture the uvial-morphological characteristics of Algiers' narrow wadis (Boutaghane et al 2022).…”

Section: Vulnerability Map Of Algiers Resulting From the Ahp Multicri...mentioning

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: Vulnerability Map Of Algiers Resulting From the Ahp Multicri...mentioning

confidence: 99%

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

Ziadi,

Keraghel

2024

Nat Hazards

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“…Examples include levees, dikes, seawalls, and flood-proof measures such as elevating critical equipment or placing it within waterproof containers or foundation systems. These protective measures are crucial for safeguarding critical infrastructure and reducing flooding impact [31,[169][170][171].…”

Section: Urban Flood Resilience (Fr)mentioning

confidence: 99%

“…Based on historical data and current conditions, structural measures are typically designed to protect against floods. However, they may not be effective in the long term and fail during extreme weather events, leading to catastrophic consequences such as levee breaches or structural collapse [22,29,31,32]. A contemporary approach has emerged in recent years, combining structural and non-structural measures during spatial planning in flood-prone areas.…”

Section: Introductionmentioning

confidence: 99%

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Revisiting Urban Resilience: A Systematic Review of Multiple-Scale Urban Form Indicators in Flood Resilience Assessment

Mabrouk,

Han,

Mahran

et al. 2024

Sustainability

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Despite the increasing number of flood studies, the interrelationships between urban form indices (UFIs) and flood resilience (FR) have received little attention and hold miscellaneous perspectives. Consequentially, this study identifies how UFIs at various spatial scales affect FR by synthesizing article findings and proposing insights for future research. Scientometric analysis has been used to analyze the gathered peer-reviewed articles from nine research engines without time restrictions. One hundred and eighteen relevant articles were included and thoroughly investigated using the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) protocol. Our findings indicate that divergent and dialectical perspectives about the efficacy of UFIs are due to multiple disciplines, methodologies, and different case study contexts. The included studies were classified according to urban scale as macro (citywide), meso (districts), micro (block), and multi-scalar analysis by 80.5%, 6.8%, 10.2%, and 2.4%, respectively. Furthermore, the included studies were categorized based on analysis type into realistic case studies, literature reviews, modeling, and hybrid analysis, with 74.6%, 7.6%, 14.4%, and 3.4%, respectively. At the macroscale, city density and spatial distribution degree have the most significant effect on FR. At the same time, mixed uses, connectivity, coverage ratio, block arrangements, and street characteristics are on the meso and micro scales. Further studies on the trade-offs and commonality between UFIs, FR, and overall urban resilience are required to shape climate-adaptive, sustainable communities.

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“…Floodplain modeling is mainly concerned with the hydrological behavior of watersheds for a particular rainfall event. The development of flood management strategies and flood damage reduction and mitigation for an ungauged catchment has remained a big challenge to engineers and policymakers [6,28]. This is genuinely true because detailed hydrological modeling is highly necessary for the estimation of flood volume and its recurrence time, which are the key parameters on which floods solutions are based [29].…”

Section: Introductionmentioning

confidence: 99%

Flood Estimation and Control in a Micro-Watershed Using GIS-Based Integrated Approach

Shuaibu,

Mujahid Muhammad,

Bello

et al. 2023

Water

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Flood analyses when using a GIS-based integrated approach have been successfully applied around the world in large-sized watersheds. This study employed hydrological-hydraulic modeling to analyze flash floods by integrating HEC-HMS, HEC-RAS, and ArcGIS software for flood evaluation and control in a micro-watershed in the Samaru River, Nigeria. The watershed boundaries, its characteristics (soil and land use), the topographical survey, and the intensity duration frequency curve (IDF) of the study area were produced using data-driven techniques. The HEC-HMS model was used to derive the peak discharges for 2-, 5-, 10-, 25-, 50-, 100-, and 200-year return periods with the frequency storm method. Afterward, the water surface profiles for the respective return periods were estimated using the HEC-RAS hydrodynamic model. The simulated design flood for the 2-, 5-, 10-, 25-, 50-, 100-, and 200-year return periods at the reference location (the NUGA gate culvert) were 3.5, 6.8, 9.1, 12.1, 14.3, 16.6, and 19.0 m3/s, respectively, while those at the watershed outlet for the respective return periods were 7.5, 14.9, 20.3, 27.3, 32.6, 38.0, and 43.5 m3/s, respectively (with a water height of 0.9 m, 1.1 m, 1.3 m, 1.33 m, 1.38 m, 1.5 3m, and 1.8 m, respectively), at the NUGA gate culvert cross-section. The maximum water depths of about 0.9 m and 1.0 m were recorded in the right and left overbanks, which were similar to the simulated water depth for the 2- and 5-year return periods. Hence, for the smart control of floods passing through the river and major hydraulic structures, a minimum design height of 1.50 m is recommended. For the most economic trapezoidal channel section, a normal depth of 1.50 m, a bottom width of 1.73 m, a top width of 3.50 m, and a free board of 0.30 m is proposed to curb the overtopping of floods along the channel sub-sections. The findings of this study could help hydraulic engineers minimize flooding in streams and rivers overbanks in a micro-watershed.

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Flood Analysis and Mitigation Strategies in Algeria

Cited by 10 publications

References 42 publications

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

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

Revisiting Urban Resilience: A Systematic Review of Multiple-Scale Urban Form Indicators in Flood Resilience Assessment

Flood Estimation and Control in a Micro-Watershed Using GIS-Based Integrated Approach

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