Qualité et comportement de l'aquifère crayeux sur le littoral Nord-Pas-de-Calais

Louche, Barbara; Crampon, N.; Bracq, Pierre

doi:10.1016/s1251-8050(99)80074-3

Cited by 2 publications

(2 citation statements)

References 6 publications

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“…Many works (Louche, Crampon, & Bracq, ; Smaoui et al, ; Zouhri, Smaoui, Carlier, & Ouahsine, ) demonstrate, locally, that an almost impervious layer of marl facies from Middle Turonian separates two superposed aquifers: the first aquifer that is composed of white chalk with flints of the Upper Turonian‐Senonian and the second made of Cenomanian chalk without flint. Previous studies have shown also that near the coastline, the Cretaceous series may be considered as homogeneous.…”

Section: Numerical Tests and Applicationmentioning

confidence: 99%

Combination of FEM and CMA‐ES algorithm for transmissivity identification in aquifer systems

Smaoui

Zouhri

Kaidi

et al. 2018

Hydrological Processes

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Section: Numerical Tests and Applicationmentioning

confidence: 99%

Combination of FEM and CMA‐ES algorithm for transmissivity identification in aquifer systems

Smaoui

Zouhri

Kaidi

et al. 2018

Hydrological Processes

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“…The chalky séries is eut into hydrogeological compartments individualised by tectonic accidents, which are preferential axes for sea intrusion. The présence of a saltwater front located far from the coast, as indicated by electrical soundings, could be explained by the geological history of the maritime plain, where the Pleistocene and Holocene seas covered the maritime plain up to the fossil cliff (LOUCHE et al, 1998).…”

mentioning

confidence: 99%

Détermination de la structure tectonique de l'aquifère crayeux du littoral Nord Pas-de-Calais par prospection géophysique couplée à des observations par forage. Conséquence sur la répartition d'eau salée

Louche¹,

Hallet²

2005

rseau

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SUMMARYAlong the North-Pas-de-Calais coast between a point south of Boutonnière du Boulonnais and the Authie River, Cretaceous rocks are limited to the east by a paleocliff that overlooks the Quaternary coastal and dune deposits. The chalk aquifer is connected to the Quaternary aquifers and further west to the sea water. Close to the seashore the top of the chalk plateau falls rapidly from 20 m above sea level to 20 m below sea level, causing the aquifer to grade from being unconfined in the east to confined in the west. This chalky aquifer is eut by several faults. A structural survey (LOUCHE et al, 1997) based on borehole data was carried out to evaluate whether the rate and direction of groundwater flow are controlled by the différent faults. Two major fault groups striking N030° and N110° hâve been revealed by the structural map, with a third minor group (N 160-170°) to the north of the Canche. The two major groups, created during tectonic activity from the Palaeozoic to the présent, are composed respectively of structures with gêne-rai faulting directions of N 100-110° and N 020-040°, previously described by COLBEAUX et al. (1993). Chalk depth and fault location are unknown in certain areas due to the lack of bore holes and outerops. With the aim of overcoming thèse deficiencies, three traditional geophysical techniques (electrical sounding, seismic logging and electromagnetic profiling) were carried out between the Canche and Authie rivers in the coastal area, west of the chalky cliffs.

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Qualité et comportement de l'aquifère crayeux sur le littoral Nord-Pas-de-Calais

Cited by 2 publications

References 6 publications

Combination of FEM and CMA‐ES algorithm for transmissivity identification in aquifer systems

Combination of FEM and CMA‐ES algorithm for transmissivity identification in aquifer systems

Détermination de la structure tectonique de l'aquifère crayeux du littoral Nord Pas-de-Calais par prospection géophysique couplée à des observations par forage. Conséquence sur la répartition d'eau salée

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