<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Ali, ATHAMENA</style></author><author><style face="normal" font="default" size="100%">Redha, MENANI Mohamed</style></author><author><style face="normal" font="default" size="100%">Halima, BELALITE</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Flux azoté dans les eaux souterraines, origine et devenir, cas de la plaine de Zana, est algérien</style></title></titles><dates><year><style  face="normal" font="default" size="100%">2018</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://docplayer.fr/66130950-Flux-azote-dans-les-eaux-souterraines-origine-et-devenir-cas-de-la-plaine-de-zana-est-algerien.html</style></url></web-urls></urls><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p style=&quot;text-align: justify;&quot;&gt;
	We tried, by this work, to contribute a share to study it the aquifers of the plain of Zana, and to evaluate the
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	risks of pollu
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	tion related to nitrogenized flow.
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	The plain of Zana belongs to the catchment area of the high plateaus constantinois and more precisely of under
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&lt;p style=&quot;text-align: justify;&quot;&gt;
	area catchment Merdja Zana, which extends on a surface of approximately 369 Km².
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&lt;p style=&quot;text-align: justify;&quot;&gt;
	The study of geology with
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	the data of geophysics highlights the existence of two formations.
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	First formation, of
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	Mio
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	-
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	Plio
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	-
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&lt;p style=&quot;text-align: justify;&quot;&gt;
	Quaternary surface of age formed by levels of sand, gravel, water limestone and argillaceous
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	intercalations.
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&lt;p style=&quot;text-align: justify;&quot;&gt;
	The second formation, it is carbonated and formed
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	primarily by limestones of the lower Cretaceous and
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	Jurassic superior of the southern unit sétifien and parautochtone aurésien.
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	The covering of surface reaches in certain
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	places the 150m thickness in particular in the medium of the plain and a low thicknes
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	s in the vicinity of the solid
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	masses.
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	As for the carbonated formations they have 350m thickness.
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&lt;p style=&quot;text-align: justify;&quot;&gt;
	The geomorphology, shows that our basin is lengthened, it has an average altitude of 935m and it is
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	characterized by a moderate relief and of soft slope.
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&lt;p style=&quot;text-align: justify;&quot;&gt;
	Th
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	e hydrographic network is fart to develop and of endoreic type
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	with a temporary flow.
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	The climatological study showed that the area of study has an arid semi climate with an overdrawn
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	hydrological assessment.
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	The outline hydrogeologic of the plain show
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	s that the trainings of the lower Cretaceous and the Jurassic
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	superior can offer very interesting aquiferous possibilities just as the surface formation, it presents considerable
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	aquiferous potentialities.
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&lt;p style=&quot;text-align: justify;&quot;&gt;
	Piezometry shows a convergence towards the depress
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	ions of Merdja de Zana and Chott
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	Saboun, which represent natural discharge system of the tablecloth.
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&lt;p style=&quot;text-align: justify;&quot;&gt;
	The hydrochimic study made it possible to allot the evaporitic origin to the elements Na
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	+
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	, Mg
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	++
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	, K
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	+
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	, Cl
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	-
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	,
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	SO4
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&lt;p style=&quot;text-align: justify;&quot;&gt;
	--
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&lt;p style=&quot;text-align: justify;&quot;&gt;
	, as for element HCO3
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	-
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&lt;p style=&quot;text-align: justify;&quot;&gt;
	,
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&lt;p style=&quot;text-align: justify;&quot;&gt;
	it results fr
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&lt;p style=&quot;text-align: justify;&quot;&gt;
	om the carbonated formations
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&lt;p style=&quot;text-align: justify;&quot;&gt;
	The two partners of analyses carried out show that water resulting from the aquifer surface and the karstic aquifer has
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&lt;p style=&quot;text-align: justify;&quot;&gt;
	the same facies hydrochimic which of magnesian type is chlorinated and sulphated, which testifies to the
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&lt;p style=&quot;text-align: justify;&quot;&gt;
	existence of a
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&lt;p style=&quot;text-align: justify;&quot;&gt;
	probable interaction between the two aquifers.
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	.
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&lt;p style=&quot;text-align: justify;&quot;&gt;
	Nitric pollution is not visible although the area is with agricultural vocation
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