Skip to main content
main-content

Tipp

Weitere Artikel dieser Ausgabe durch Wischen aufrufen

01.09.2015 | Original Article | Ausgabe 6/2015

Environmental Earth Sciences 6/2015

Origin and salinity of groundwater from interpretation of analysis data in the mining area of Oumjrane, Southeastern Morocco

Zeitschrift:
Environmental Earth Sciences > Ausgabe 6/2015
Autoren:
Yassine Ait Brahim, Abdelfattah Benkaddour, Mbark Agoussine, Anasse Ait Lemkademe, Latifa Al Yacoubi, Lhoussaine Bouchaou
Wichtige Hinweise

Article impact statement

This is the first study of groundwater in the mining area of Oumjrane. The main focus is to understand the origin of the abundant groundwater resources, under an arid environment, and the hydrochemical processes that occur within the aquifers.

Abstract

Under the arid climate in the southern sub-Saharan catchments of Morocco, groundwater is the only permanent water supply. Usually, the groundwater is scarce because of the low recharge. However, the mining activities in Oumjrane area (Eastern Anti-Atlas Mountains) reveal that water resources are relatively abundant in the fissured Ordovician aquifer. To understand this phenomenon, geochemical and isotopic investigations were carried out in the region. The results show that the quality of water is variable in superficial and deep aquifers. The specific conductivities range from 0.44 to 10 mS/cm. Most groundwater samples from the deep aquifer indicate high salinity, low pH, and CO2 anomalies. Geochemical analyses show that groundwater concentrations are mainly controlled by (i) evaporite dissolution (halite and gypsum), (ii) cation exchange with clay minerals, (iii) silicate hydrolysis, and (iv) dedolomitisation. Carbonate precipitation takes place in the groundwater issuing from the mine sector. The discharge is estimated at 386 T/year downstream of the Bounhass mine. Moreover, stable isotope (δ2H and δ18O) and chemical analyses reveal a clear difference between the alluvial and deep aquifers. They also show a local recharge for the alluvial aquifer from Saghro inliers. Low isotope ratios are found in the Ordovician formation aquifer, indicating a deep water circulation. These waters could originate from the High Atlas and/or Saghro Mountains and flow through fissures and fault networks. Connections to regional faults and veins may play a role in it, as well as the proximity of the major contact with the High Atlas.

Bitte loggen Sie sich ein, um Zugang zu diesem Inhalt zu erhalten

Sie möchten Zugang zu diesem Inhalt erhalten? Dann informieren Sie sich jetzt über unsere Produkte:

Springer Professional "Wirtschaft+Technik"

Online-Abonnement

Mit Springer Professional "Wirtschaft+Technik" erhalten Sie Zugriff auf:

  • über 69.000 Bücher
  • über 500 Zeitschriften

aus folgenden Fachgebieten:

  • Automobil + Motoren
  • Bauwesen + Immobilien
  • Business IT + Informatik
  • Elektrotechnik + Elektronik
  • Energie + Umwelt
  • Finance + Banking
  • Management + Führung
  • Marketing + Vertrieb
  • Maschinenbau + Werkstoffe
  • Versicherung + Risiko

Testen Sie jetzt 30 Tage kostenlos.

Springer Professional "Technik"

Online-Abonnement

Mit Springer Professional "Wirtschaft" erhalten Sie Zugriff auf:

  • über 50.000 Bücher
  • über 380 Zeitschriften

aus folgenden Fachgebieten:

  • Automobil + Motoren
  • Bauwesen + Immobilien
  • Business IT + Informatik
  • Elektrotechnik + Elektronik
  • Energie + Umwelt
  • Maschinenbau + Werkstoffe




Testen Sie jetzt 30 Tage kostenlos.

Literatur
Über diesen Artikel

Weitere Artikel der Ausgabe 6/2015

Environmental Earth Sciences 6/2015 Zur Ausgabe