Murat ÇELİKER, Nurettin PARLAKYILDIZ, Mualla ÖZTÜRK

Hazar Gölü Havzasında (Elazığ, Türkiye) Sulama Suyu Kullanımı için Su Kalite Değerlendirmesi

Bu çalışmanın amacı Hazar Gölü Havzasında su kaynaklarının tarımsal kullanıma uygunluğunu araştırmaktır. Bu amaçla, 2015 yılının yağışlı döneminde 61 lokasyondan ve kurak döneminde 60 lokasyondan su numuneleri alınmış ve pH, elektriksel iletkenlik, kalsiyum, magnezyum, sodyum, potasyum, bikarbonat, klorür ve sülfat parametreleri analiz edilmiştir. Bu analizlere dayanarak, yüzde sodyum (%Na), sodyum absorbsiyon oranı (SAR), artık sodyum karbonat (RSC), magnezyum oranı (MR), permeabilite indeksi (PI) ve Kelly Oranı (KR) hesaplanmıştır. Ayrıca, yeraltı suyunun tarımsal faaliyetlerde kullanılabilirliği Wilcox ve ABD Tuzluluk Laboratuvarı (USSL) Diyagramlarına göre değerlendirilmiştir. EC, SAR, %Na, RSC, PI, KR ve MR değerleri, göle yakın birkaç yer dışında, suyun sulama suyu olarak uygun olduğunu ortaya koymuştur. ABD Tuzluluk Diyagramı (USLL) ve Wilcox diyagramlarında yapılan sınıflandırmalarda da benzer sonuçlar elde edilmiştir. Tematik su kalitesi parametre haritaları, yeraltı suyu kalitesinin yüksek kotlardan göl seviyesine olan akış yolu boyunca düştüğünü göstermiştir.

Anahtar Kelimeler:

Hazar Gölü Havzası, sulama suyu kalitesi, tematik haritalar, SAR, %Na

Water Quality Assessment for Irrigation Water Use in Lake Hazar Basin, Elazığ, Turkey

The goal of this work was to research the suitability of water sources for agricultural use in the Lake Hazar Basin For this purpose, samples are taken from 61 locations during the wet period and 60 locations during the dry period in 2015 and analyzed pH, electrical conductivity, calcium, magnesium, sodium, potassium, bicarbonate, chloride and sulfate parameters. Based on these analyses sodium percentage (Na%), sodium absorption ratio (SAR), residual sodium carbonate (RSC), magnesium ratio (MR), permeability index (PI) and Kelly’s ratio (KR) were calculated. Also, the usability of groundwater in agricultural activities is evaluated according to Wilcox and United States Salinity Laboratory (USSL) Diagrams. The EC, SAR, Na%, RSC, PI, KR and MR values revealed that suitability of waters as irrigation water, except for a few locations close to the lake. Similar results were obtained from classifications made according to USLL and Wilcox diagrams. The thematic maps of water quality parameters displayed that the groundwater quality decreases along the flow path from high elevations to lake level.

Keywords:

Lake Hazar Basin, irrigation water quality, thematic maps, SAR, Na%,

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