TEMPERATURE AND DISSOLVED OXYGEN STRATIFICATION IN ALMUS DAM LAKE ON YEŞILIRMAK RIVER (TURKEY) AND ITS GIS MAPS

Abstract

The temperature and dissolved oxygen parameters of Almus Dam Lake located in the district Almus of province Tokat were seasonally determined at nine stations located along the lake. The water quality class of Almus Dam Lake was determined by comparing the results of our measured parameters with the values of Intercontinental Water Sources Quality Classification. The spatial and seasonal variations in physical parameters were analyzed with the Two-Way ANOVA, the relationships among these parameters. According to Intercontinental Water Sources Quality Classification, Almus Dam Lake has Class I water quality when considering parameters of temperature (14.30±7.44C°), dissolved oxygen (10.15±2.67mg/L. With the examination of seasonal temperature-depth profile, it was observed that winter stagnation and spring and fall vertical mixing occurred during the January and March and spring May and November, respectively. Temperature stratification was clearly observed during the July and September. Epilimnion, metalimnion (thermocline) and hypolimnion were well clearly visible at the first 10 meters, between 10– 20 meters, and below 20 meters, respectively. GIS maps with spatial and seasonal values were created for temperature and dissolved oxygen variables.

Keywords

• Temperature
• Dissolved Oxygen
• Stratification
• Almus Dam Lake
• Yeşilırmak River

YEŞİLIRMAK NEHRİ (TÜRKİYE) ÜZERİNDE BULUNAN ALMUS BARAJ GÖLÜ’NDE SICAKLIK VE ÇÖZÜNMÜŞ OKSİJEN TABAKALAŞMASI VE CBS HARİTALARI

Öz

Yeşilırmak Nehri üzerinde bulunan Almus Baraj Gölü’nde belirlenen 9 istasyonda sıcaklık ve çözünmüş oksijen parametreleri mevsimsel ve alansal olarak tespit edilmiştir. Çalışmada fiziksel parametrelere ait bulgular “Kıta İçi Su kaynakları Kalite Sınıflandırılması” değerleri ile karşılaştırılarak, Almus Baraj Gölü’nün ölçülen parametreler (sıcaklık ve çözünmüş oksijen) açısından su kalite sınıfları tespit edilmiştir. İlgili parametrelerde meydana gelen mevsimsel ve alansal değişimleri tespit etmek için; iki yönlü varyans analizi (ANOVA) testi kullanılmıştır. Kıta İçi Su kaynakları Kalite Sınıflandırılmasına göre Almus Baraj Gölü sıcaklık (14.30±7.44C°), çözünmüş oksijen (10.15±2.67mg/L) açısından I. sınıf su kalitesine sahiptir. Sıcaklık değerlerinin derinliğe göre değişimi incelendiğinde, Almus Baraj Gölü’nde Ocak ve Mart aylarında kış stangasyonu, Mayıs ve Kasım aylarında ilkbahar ve sonbahar karışımı, Temmuz ve Eylül aylarında ilk 10m’de epilimnion, 10 ile 20m arasında termoklin, 20m’den aşağı derinliklerde ise hipolimnion tabakası tespit edilmiştir. Sıcaklık ve çözünmüş oksijen değişkenleri için mekânsal ve mevsimsel değerlere sahip CBS haritaları oluşturulmuştur.

Anahtar Kelimeler

• Sıcaklık
• Çözünmüş oksijen
• Tabakalaşma
• Almus Baraj Gölü
• Yeşilırmak Nehri

Kaynakça

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