Gediz Nehri Medar Havzası Meteorolojik ve Hidrolojik Kuraklık Analizleri

Öz

Akarsu havzalarında oluşan kuraklık olaylarının sürdürülebilir yönetim açısından karakteristik özelliklerinin belirlenmesi önemlidir. Bu sebeple oluşan kuraklık olaylarının süre, şiddet gibi karakteristik özelliklerinin tanımlanabilinmesi amacıyla indis yöntemleri geliştirilmiştir. Sunulan çalışmada, Gediz havzasında yer alan Medar alt havzasının meteorolojik ve hidrolojik kuraklıkları en yaygın olarak kullanılan standardize yağış indisi (SPI), standardize yağış evapotranspirasyonu indisi (SPEI) ve standardize akım indisi (SRI) yöntemleri kullanılarak araştırılmıştır. Havzayı temsil eden Akhisar ve Sarılar meteoroloji istasyonlarınnda gözlemlenen meteorolojik veriler ile beraber Medar çayı üzerinde Medar Köprüsünde gözlemlenen akım değerleri kullanılarak 1971-2015 yılları arasında aylık, 3 aylık, 6 aylık ve 12 aylık zaman dilimlerinden meydana gelen meteorolojik ve hidrolojik kuraklar belirlenmiştir. İlgili zaman dilimlerinde meydana gelen kuraklıkların karakteristik özellikleri Run teorisi kullanılarak açıklanmıştır. Çalışma sonucunda meteorolojik ve hidrolojik kuraklıkların karakteristik ilişkileri belirlenmiştir.

Anahtar Kelimeler

• SPI
• SPEI
• SRI
• Medar
• Kuraklık indisi
• Medar Basin
• Drought index
• Run theory

Meteorological and Hydrological Drought Analysis Of Medar Basin

Öz

It is important to determine the characteristics of drought events in river basins in terms of sustainable management. For this reason, index methods have been developed in order to define the characteristic features of drought events such as duration and severity. In the present study, meteorological and hydrological droughts of the Medar sub-basin in the Gediz basin were investigated by the most widely using standardized precipitation index (SPI), standardized precipitation evapotranspiration index (SPEI) and standardized runoff index (SRI) methods. Meteorological and hydrological droughts between 1971 and 2015, at monthly, 3 month, 6 month and 12 month time scales, were determined by using the meteorological data observed at Akhisar and Sarılar meteorological stations, which represent the basin, and the runoff values observed at the Medar Bridge over the Medar Stream. The characteristic features of droughts occurring in the relevant time periods are explained using Run theory. As a result of the study, the characteristic relationships of meteorological and hydrological droughts were determined.

Anahtar Kelimeler

• Medar Basin
• Drought index
• Run theory

Kaynakça

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