Geochemical processes and groundwater chemistry: A case study Akçaşehir Plain (Karaman)

Yıl 2024, Cilt: 13 Sayı: 4, 1526 - 1537, 15.10.2024

Fatma Aksever , Ayşen Davraz

https://doi.org/10.28948/ngumuh.1526114

Öz

In this study, the hydrochemical structure of groundwater in the Akçaşehir (Karaman) region and the factors forming this structure were investigated using chemical analysis data. In the evaluations, the origin of the chemical composition of the groundwater and the control mechanisms were determined by ion ratio analysis, correlation analysis and other hydrogeochemical methods. The Akçaşehir plain is located in the northeast of Karaman province. There are many drilling wells used in groundwater supply on the plain. The foundation of the study area consists of allochthonous rocks belonging to the Bolkar Mountain Unit. Current sediments with free aquifer characteristics and limestones in the region are important aquifers containing groundwater. In the study, it was determined that 74% of the water samples were in the Mg-Ca-HCO3/Ca-Mg-HCO3 water facies. The most effective hydrogeochemical process forming this structure is carbonate dissociation. The Na+ and SO4-2 increases detected in some samples are related to silicate dissociation and ion exchange processes. In general, it was determined that the water-rock interaction in the area directly affects the hydrogeochemical processes.

Anahtar Kelimeler

Geochemical Processes, Groundwater, Water Chemistry, Akçaşehir (Karaman)

Jeokimyasal süreçler ve yeraltısuyu kimyası: Akçaşehir Ovası (Karaman) örneği

Öz

Bu çalışmada, Akçaşehir (Karaman) bölgesi yeraltısularının hidrokimyasal yapısı ve bu yapıyı oluşturan faktörler kimyasal analiz verileri kullanılarak araştırılmıştır. Değerlendirmelerde yeraltısuyunun kimyasal bileşiminin kökeni ve kontrol mekanizmaları; iyon oranı analizi, korelasyon analizi ve diğer hidrojeokimyasal yöntemlerle belirlenmiştir. Akçaşehir ovası Karaman ilinin kuzeydoğusunda yer almaktadır. Ova üzerinde yeraltısuyu temininde kullanılan çok sayıda sondaj kuyusu yer almaktadır. İnceleme alanının temelini Bolkar Dağı Birliği’ne ait allokton kayalar oluşturmaktadır. Bölgede serbest akifer özelliğindeki güncel çökeller ve sahip kireçtaşları yeraltısuyu bulunduran önemli akiferlerdir. Çalışmada su örneklerinin %74’ünün Mg-Ca-HCO3/Ca-Mg-HCO3’lı sular fasiyesinde olduğu belirlenmiştir. Bu yapıyı oluşturan en etkin hidrojeokimyasal süreç karbonat çözünümüdür. Bazı örneklerde tespit edilen Na+ ve SO4-2 artışları silikat ayrışması ve iyon değişim süreçleri ile ilişkilidir. Genel olarak alanda su-kayaç etkileşiminin hidrojeokimyasal süreçleri doğrudan etkilediği belirlenmiştir.

Anahtar Kelimeler

Jeokimyasal Süreçler, Yeraltısuyu, Su Kimyası, Akçaşehir (Karaman)

Kaynakça

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