STRUCTURAL FLOOD ANALYSIS BASED ON THE HYDRAULIC MODEL OF THE KÜÇÜK AKSU RIVER

Abstract

In this study, flood risk areas were determined with Hec-RAS hydraulic model for the Küçük Aksu River in Antalya, Turkey. Firstly, Hec-RAS models were developed according to different recurrence flow rates and, flood propagation maps and flood depth maps were generated. As a result of the model that was developed by using a 100-year flood recurrence flow rate, it was seen that 6.04 ha of the residential area and 33.73 ha of the agricultural area is submerged. The maximum water level was determined as 11.60 m according to the 100-year flood recurrence flow rate. Then, structural flood analysis was performed using the depth-damage graph for the Küçük Aksu River. As a result of this analysis, it was seen that the economic loss caused by floods was between 1.152 million-1.946 million TL.

Keywords

• Flood risk analysis
• Hec-RAS
• structual flood analysis
• Küçük Aksu River
• GIS

KÜÇÜK AKSU ÇAYI’NDA HIDROLIK MODELE DAYALI YAPISAL TAŞKIN ANALİZİ

Abstract

Bu çalışmada, Antalya ilinde bulunan Küçük Aksu Çayı’nda Hec-RAS ile taşkın riski olan alanlar belirlenmiştir. İlk olarak, farklı tekerrür debilerine göre Hec-RAS modelleri geliştirilmiş ve taşkın yayılım haritaları ile taşkın derinlik haritaları oluşturulmuştur. 100 yıllık taşkın tekerrür debisi kullanılarak geliştirilen model sonucunda 6,04 ha yerleşim alanı ile 33,73 ha tarım alanının su altında kaldığı görülmüştür. 100 yıllık taşkın tekerrür debisine karşılık gelen maksimum su yüksekliği 11,60 m olarak saptanmıştır. Daha sonra derinlik-hasar grafiği yardımıyla Küçük Aksu Çayı için yapısal taşkın analizi yapılmıştır. Yapılan analiz sonucunda taşkınların neden olduğu ekonomik kaybın 1.152 milyon-1.946 milyon TL arasında olduğu görülmüştür.

Keywords

• Taşkın risk analizi
• Hec-RAS
• yapısal taşkın analizi
• Küçük Aksu Çayı
• CBS

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