Skip to main content
main-content

Tipp

Weitere Artikel dieser Ausgabe durch Wischen aufrufen

01.06.2015 | Original Article | Ausgabe 12/2015

Environmental Earth Sciences 12/2015

Investigating groundwater recharge by means of stable isotopes in the Al-Khazir Gomal Basin, northern Iraq

Zeitschrift:
Environmental Earth Sciences > Ausgabe 12/2015
Autoren:
Hussein A. Jassas, Broder J. Merkel

Abstract

Stable isotopes (δ18O and δ2H), 14C and groundwater chemistry were used in this study for gaining insight into the recharge mechanisms and groundwater geochemical evolution in a semi-arid region of northern Iraq. The 3,185 km2 large catchment of the Al-Khazir Gomal Basin is divided into three regions (south, central, and north) depending on structural and geological aspects. In terms of hydrogeology, the vast syncline in the central part of the watershed is considered to be the most important region regarding groundwater quality and quantity. Groundwater samples of both confined and unconfined aquifers plot on or slightly above the local meteoric water line and the slope of the δ18O and δ2H regression line for the confined and unconfined aquifers is 7.26 and 7.01, respectively. This is interpreted as an indicator of considerable recharge with short residence time for the shallow groundwater, excluding the effect of evaporation before infiltration. This assumption was supported by low chloride concentrations, groundwater Ca-HCO3 type and the high values of 14C activities. The variations in stable isotopes and 14C in the confined aquifer support the assumption of existence of different recharge resources and mechanisms. Hydrogeochemically, there are three main mechanisms contributing to the chemical evolution of the groundwater; these are the preferential chemical weathering of the carbonate cement of the sandstones, geochemical weathering of silicate minerals and cation exchange processes. Meteoric NaCl is considered to be the main source of dissolved Na and Cl ions in freshwater samples. Additional Na might stem from cation exchange with dissolved Ca and Mg.

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

Testen Sie jetzt 30 Tage kostenlos.

Springer Professional "Technik"

Online-Abonnement

Mit Springer Professional "Technik" 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 12/2015

Environmental Earth Sciences 12/2015 Zur Ausgabe