Evidence for Quaternary liquefaction-induced features in the epicentral area of the 21 May 2003 Zemmouri earthquake (Algeria, M w = 6.8)

Bouhadad, Youcef; Benhamouche, Azzeddine; Maouche, Saïd; Belhai, Djelloul

doi:10.1007/s10950-008-9134-y

Cited by 19 publications

(6 citation statements)

References 27 publications

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“…The obtained results suggest that the moderate and high liquefaction area have been observed in the sand layer characterized by moderate and high susceptibility to liquefaction, particularly, along the Corso waterway at the west of Boumerdès city. These results also show a good agreement with the observations made during the May 21, 2003 (Mw = 6.8) Zemmouri earthquake Machane et al 2004;Bouhadad et al 2008). The obtained results are also compatible with the geological, geotechnical, and hydrogeological susceptibility to liquefaction of the area (Youd and Perkins 1978).…”

Section: Fs ¼ Crr=csr ð2þsupporting

confidence: 90%

“…6) (ii) Data from in situ tests and analyses indicating that the soils are likely to liquefy; (iii) Area containing late Holocene age soils, groundwater table at < 13 m of depth and the ground motion acceleration (PGA) having a probability of 10% of being exceeded in 50 years greater than 0.1 g; (iv) Holocene age soils with groundwater table depth less than 10 m and the PGA probability (10% in 50 years) greater than 0.2 g. By considering the above mentioned criteria, the area of Boumerdès appears as a site of high seismicity, the design acceleration (PGA) of the new Algerian seismic code is equal to 0.30 g, having a 10% probability of being exceeded in 50 years (RPA 2003). Furthermore, the Zemmouri earthquake of May 21, 2003 (Mw 6.8) induced extensive liquefaction phenomena Machane et al 2004) and evidences of paleoliquefaction of seismic origin were also found and described in the urban area of Boumerdès (Bouhadad et al 2008) (Fig. 12).…”

Section: Geological and Hydrogeological Susceptibilitymentioning

confidence: 94%

“…12 Distribution of liquefaction during the main shock of the May 21, 2003(Mw = 6.8) Zemmouri earthquake (Inset) and the observed paleo-liquefaction in the studied area Machane et al 2004;Bouhadad et al 2008). Letters (ad) indicate the location of photographs of Fig.…”

Section: Fs ¼ Crr=csr ð2þmentioning

confidence: 97%

“…However, no liquefaction was reported during the several earthquakes of magnitude M s. < 6.0 that occurred during this century. Nevertheless, paleoliquefaction is also described in quaternary geological layers triggered likely by ancient pre-historic seismic events (Bouhadad et al 2008;Benhammouche et al 2013). During the 2003 Zemmouri earthquake (M w = 6.8) liquefaction induced ground deformation has been extensively observed in the most susceptible areas around Boumerdès city, mainly along riversides and along the beach land, where, the geological, geotechnical, and hydrogeological conditions are most favorable Machane et al 2004).…”

Section: Introductionmentioning

confidence: 99%

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Liquefaction hazard mapping in the city of Boumerdès, Northern Algeria

Bourenane

Bouhadad

Tas

2017

Bull Eng Geol Environ

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The city of Boumerdès, located in Northern Algeria, was badly affected during the May 21, 2003 Zemmouri (Mw = 6.8) earthquake where extensive liquefaction has been reported. The aim of this paper is to assess and to map the liquefaction potential for Boumerdès. We collected and used data from 154 boreholes, 10 down-hole tests, 56 standard penetrations tests (SPT), and inventory of 35 water level points. This data has been analyzed in the framework of geographical information systems (GIS). We assessed the liquefaction potential index (LPI) by considering a seismic hazard scenario corresponding to a max = 0.48 g calculated, using a probabilistic approach, for a return period of 500 years. LPI values have been correlated to compile the liquefaction hazard map that indicates the quantitative characteristics of the liquefiable layers and the induced disruption probability area. Results show that the main part of the city of Boumerdès belongs to a low liquefaction potential area except for a narrow corridor along the Corso waterway, where the liquefaction potential is moderate to high. The obtained results are compatible with the geological, geotechnical and hydrogeological susceptibility to liquefaction of the area. The results also show a good agreement with the observations made after the May 21, 2003 Zemmouri earthquake. The obtained liquefaction hazard maps may serve as useful tools for land management and planning in the city of Boumerdès and as an example of liquefaction hazard assessment that may be applied in other populated cities in northern Algeria's seismic prone areas.

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Section: Fs ¼ Crr=csr ð2þsupporting

confidence: 90%

Section: Geological and Hydrogeological Susceptibilitymentioning

confidence: 94%

Section: Fs ¼ Crr=csr ð2þmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

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Liquefaction hazard mapping in the city of Boumerdès, Northern Algeria

Bourenane

Bouhadad

Tas

2017

Bull Eng Geol Environ

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“…Fine-grained soilsare transformed from a solid state to a liquefied state as a consequence of increased pore pressure and reduced effective stress [1,2]. In situ tests and simplified procedures are frequently used to evaluate the liquefaction of soils.…”

Section: Introductionmentioning

confidence: 99%

Assessement of Liquefactionin Boumerdes (Algeria) Using Reliability Analysis

BENAHCHILIF¹

2016

geomate

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A destructive earthquake of magnitude Mw=6.8 hit the region of Boumerdes and Algiers (Algeria) on May 21, 2003. Evidence of soil liquefaction was observed ina site located in the vicinity of Boumerdes. The results of traditional analysis of soil liquefaction potential using simplified procedures are usually presented in terms of safetyfactor. However, these methods do not take into account inherent variability which is expressed in terms of liquefaction probability related to safety factors. An answer to this problem can be found by reliability analysis. In this study, a practical reliability based method is used for assessing the soil liquefaction potential. As an application, the Boumerdes region belongs to the Tell Atlas thrust of Algeria is investigated for liquefaction potential. The investigated are based on in situ tests in which the results of SPT are analyzed.It was found that even with a safety factor of 1.34, the soil still has a liquefaction probability about 30.85% for the given design earthquake.

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