1-D and 2-D flood modeling studies and upstream structural measures for Samsun city Terme district

Thesis Type: Postgraduate

Institution Of The Thesis: Orta Doğu Teknik Üniversitesi, Faculty of Engineering, Department of Civil Engineering, Turkey

Approval Date: 2015




In this study, Samsun City Terme District flood problem is examined with 1-D and 2-D flood modeling approach. In July 2012 Terme City Centre was exposed to a flood event. Approximately 510 m³/s flood discharge passed through the city. The river water level reachedtop of the levees and some parts were overflowed. The area is exposed to flooding as ifthe other urban areas located in Black Sea Region. The possible causes and effects of the flood problem on the Terme District are examined and some upstream structural measures are presented. MIKE by DHI (Danish Hydraulic Institute) software isused for the computer based flood modeling. MIKE 11 isselected for one-dimensionalhydraulic modeling and MIKE 21 isselected for two-dimensional flood modeling.The flood models are studied from City of Terme entrance (Terme Bridge) to the upstream Salıpazarı region of the river (Salıpazarı Bridge). The studies show that the meanders on the upstream part of the Terme River help in routing and attenuating the discharge especially in flood events. vi The capacity of the stream channel cannot be increased by increasing the width of the stream channel, because of the urbanization problem, therefore upstream structural measures are studied on scenario basis. Four sub catchments of Terme River are considered, in each scenario as contributing the downstream flooding. Model studies with various discharge hydrographs are carried on for different scenarios including both existing situation and possible projected situations.