Creating Flood Inundation Maps For Lower Sakarya River

Abstract

The Sakarya River Basin in Turkey frequently floods. The allure of riverside settlement and of nutrient-rich riverbank soil has led to extensive residential and agricultural development in flood plains. In this study, the 100 years return period possible flood carrying capacites of last 113 km of the Lower Sakarya Riverbed were investigated, also dam break and risk analyses were performed by applying different scenarios for the floods likely to occur. Flooding scenarios and water depth within the floodplain during these scenarios were calculated with the HEC-RAS software program and results were converted into a map in HEC-GeoRAS,ArcGIS 9x and ArcView 3.2 programs. As a result, it was observed that the Lower Sakarya River is susceptible to flooding. Recent observations of the study area confirm the study findings. This study tries to underscore the importance of taking into account the different scenarios regarding flood prevention and reduction studies.

Keywords

• Sakarya River, Flood, Floodplain, HEC-RAS

Aşağı Sakarya Nehrinde Taşkın Yayılım Haritalarının Elde Edilmesi

Abstract

The Sakarya River Basin in Turkey frequently floods. The allure of riverside settlement and of nutrient-rich riverbank soil has led to extensive residential and agricultural development in flood plains. In this study, the 100 years return period possible flood carrying capacites of last 113 km of the Lower Sakarya Riverbed were investigated, also dam break and risk analyses were performed by applying different scenarios for the floods likely to occur. Flooding scenarios and water depth within the floodplain during these scenarios were calculated with the HEC-RAS software program and results were converted into a map in HEC-GeoRAS,ArcGIS 9x and ArcView 3.2 programs. As a result, it was observed that the Lower Sakarya River is susceptible to flooding. Recent observations of the study area confirm the study findings. This study tries to underscore the importance of taking into account the different scenarios regarding flood prevention and reduction studies.

Keywords

• Sakaraya Nehri, Taşkın, Taşkın Sahası, HEC-RAS

References

1. (REFERENCES) Özdemir H., Taşkınların Haritalanmasında HecGeoRAS ve Hec-RAS’ın Kullanımı: Havran Çayı Örneği (Balıkesir), TMMOB Harita Ve Kadastro Mühendisleri Odası Ulusal Coğrafi Bilgi Sistemleri Kongresi, Trabzon, 2007
2. Bayazıt M., Oğuz B:, Mühendisler İçin İstatistik, ISBN 975-511-102-6, Birsen, İstanbul, Haziran 1994
3. Işık S., ŞaşaL M., Doğan E., Sakarya Nehrinde Barajların Mansap Etkisinin Araştırılması, Gazi Üniv. Müh. Mim. Fak. Dergisi, Ankara, 2006