ASSESSMENT OF TEMPORAL VARIATIONS OF GROUNDWATER RECHARGE IN ERGENE BASIN (NORTHWESTERN TURKEY) IN TERMS OF CLIMATE CHANGE

Öz

Yeraltısularının sürdürülebilir olarak kullanımı için beslenme çok önemlidir. Türkiye'nin kuzey batısında yer alan Ergene . Bu çalışmada, Ergene Havzası'ndaki yeraltı suyu beslenmesinin zamansal değişiminin belirlenmesi amaçlanmıştır. Bu amaçla 1966-2014 havzada bulunan ana meteoroloji istasyonlarının verileri kullanılmıştır. Çalışma alanı çok büyük olduğu için daha gerçekçi sonuçlar elde edebilmek için Doğu ve Batı Bölge olmak üzere iki bölgeye ayrılmıştır. Hidrolojik bütçe yöntemi kullanılarak hesaplanan yeraltısuyu beslenmesi, yağış ve sıcaklık trendleri ile uyumlu olarak Batı Bölgesinde çok az bir artış eğilimi gösterirken Doğu Bölgesinde azalma eğilimi göstermiştir. Havzanın Doğu Bölgesinde ise artan su ihtiyacı, aşırı çekim ve iklim değişikliğinin birleşik etkisiyle önemli yeraltı suyu düşümleri meydana gelmiştir. Hesaplanan Standart Yağış İndeksi (SPİ) değerleri, çalışma alanında araştırma dönemleri boyunca orta-hafif kuraklık periyodu yaşandığını tespit edilmiştir.

Anahtar Kelimeler

• Yeraltısuyu beslenmesi
• Ergene Havzası
• SPI indeksi

ASSESSMENT OF TEMPORAL VARIATIONS OF GROUNDWATER RECHARGE IN ERGENE BASIN (NORTHWESTERN TURKEY) IN TERMS OF CLIMATE CHANGE

Öz

Recharge of groundwater is important for the sustainability of this resource. Groundwater in Ergene Basin is used for domestic purposes, irrigation and industrial demand. In this study, it is aimed to determine the temporal variations of groundwater recharge in Ergene Basin. For this purpose data of main meteorological stations located the basin in 1966 - 2014 were used. The study area is divided into two zones, eastern zone (EZ) and western zone (WZ). Groundwater recharge, which is calculated using hydrologic budget method, showed a decreasing trend in EZ while very slightly increasing trend in WZ consistent with the decreasing precipitation and increasing temperature trends. Increasing demand for groundwater and over pumping in EZ of the Basin caused significant groundwater declines with combined effect of climate change. According to Standardized Precipitation Index (SPI) values the study area also experienced moderate-mild draught during the study periods.

Anahtar Kelimeler

• Groundwater Recharge
• Ergene Basin
• SPI index

Kaynakça

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