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Journals / Gazi Üniversitesi Fen Bilimleri Dergisi Part C: Tasarım ve Teknoloji / 2026 / Cilt: 14 Sayı: 3

Seasonal Drought Analysis Using the Standardized Precipitation Index (SPI): The Case of the Susurluk Basin

Standartlaştırılmış Yağış İndisi (SYİ) İle Mevsimsel Kuraklık Analizi: Susurluk Havzası Örneği

İsmail Faki(Genç İnşaat)0000-0003-3986-8053
Murat Pınarlık(GAZİ ÜNİVERSİTESİ)0000-0001-8783-825X
Zeliha Selek(GAZİ ÜNİVERSİTESİ)0000-0002-5593-5538
Pages
1355–1368
Publication Date
2026-09-30
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

The findings indicated that the “near normal” class was dominant at all stations; however, severe and extreme drought events recurred during certain periods.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:Drought is one of the major meteorological hazards that causes significant impacts on water resources, agricultural production, and ecosystems.
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Key Findings & Data:Precipitation series were evaluated separately for spring, summer, autumn, and winter seasons, and seasonal SPI time series were generated for each station.
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Conclusion & Impact:The findings indicated that the “near normal” class was dominant at all stations; however, severe and extreme drought events recurred during certain periods.
🔬Design:Araştırma Makalesi
📍Scope:2003 Verileri
⚙️Variables:SYİ · Mevsimsel Kuraklık · Susurluk Havzası

Abstract

Drought is one of the major meteorological hazards that causes significant impacts on water resources, agricultural production, and ecosystems. In this study, the Standardized Precipitation Index (SPI) method was used to assess seasonal drought variability in the Susurluk Basin. Within the scope of the study, long-term monthly precipitation data obtained from eight meteorological stations located within the basin boundaries were used. Precipitation series were evaluated separately for spring, summer, autumn, and winter seasons, and seasonal SPI time series were generated for each station. The obtained results were presented graphically based on the provinces where the stations are located, and the temporal and spatial drought behavior across the basin was investigated. The findings indicated that the “near normal” class was dominant at all stations; however, severe and extreme drought events recurred during certain periods. In particular, the years 1985–1989, 2003, 2007, 2014, and 2022 stood out as simultaneous drought periods at many stations. It was also determined that drought variability was higher in summer and winter seasons compared to the other seasons.

Özet

Kuraklık, su kaynakları, tarımsal üretim ve ekosistemler üzerinde önemli etkiler oluşturan başlıca meteorolojik afetlerden biridir. Bu çalışmada, Susurluk Havzası’nda mevsimsel kuraklık değişkenliğinin ortaya konulması amacıyla Standartlaştırılmış Yağış İndisi (SYİ) yönteminden yararlanılmıştır. Çalışma kapsamında havza sınırları içerisinde yer alan sekiz meteoroloji istasyonuna ait uzun dönem aylık yağış verileri kullanılmıştır. Yağış serileri ilkbahar, yaz, sonbahar ve kış mevsimleri için ayrı ayrı değerlendirilmiş ve her istasyon için mevsimsel SYİ zaman serileri oluşturulmuştur. Elde edilen sonuçlar, istasyonların bulundukları iller esas alınarak grafiksel olarak sunulmuş ve havza genelindeki zamansal ile mekânsal kuraklık davranışları incelenmiştir. Bulgular, tüm istasyonlarda “normale yakın” dönemlerin çoğunlukta olduğunu, ancak belirli dönemlerde şiddetli ve aşırı kuraklık evrelerin tekrarlandığını göstermiştir. Özellikle 1985–1989, 2003, 2007, 2014 ve 2022 yılları birçok istasyonda eş zamanlı kurak dönemler olarak öne çıkmıştır. Yaz ve kış mevsimlerinde kuraklık değişkenliğinin diğer mevsimlere göre daha yüksek olduğu belirlenmiştir.

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Cite This Article

Faki, İ., Pınarlık, M., Selek, Z. (2026). Seasonal Drought Analysis Using the Standardized Precipitation Index (SPI): The Case of the Susurluk Basin. Gazi Üniversitesi Fen Bilimleri Dergisi Part C: Tasarım ve Teknoloji, Cilt: 14 Sayı: 3, 1355–1368. https://doi.org/10.29109/gujsc.1941160

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