Generation of 1D and 2D flood maps of Sakarya river passing through Geyve district of Sakarya city in Turkey
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Generation of 1D and 2D flood maps of Sakarya river passing through Geyve district of Sakarya city in Turkey Gokmen Ceribasi1 · Ahmet Iyad Ceyhunlu1 Received: 25 May 2020 / Accepted: 14 September 2020 © Springer Nature B.V. 2020
Abstract In recent years, changes in precipitation caused by climate change resulting from global warming lead to great floods in world. This climate change causes drought in some regions, whereas it causes heavy rainfall in some other regions. Investigating the effects of large floods as a result of heavy rains is of great importance. Turkey is among countries affected by climate change as a result of global warming due to its location. Extreme rainfall has caused great floods in country. Although the effect of these floods cannot be phased out completely, it is important to establish flood models to minimize them. Being the third longest river in Turkey, Sakarya river frequently exposes town Geyve in Sakarya Province to floods. The occurrence of these floods can be affected by sudden and severe rainfall, as well as negative interventions made by people living in this region. Therefore, it is very important to model flood that may occur as a result of heavy rains in Geyve district of Sakarya river in study. In order to establish this flood model, first and foremost recurrence flows of 100 and 500 years will be determined, then digital terrain model will be prepared in ArcGIS software, and 1- and 2-dimensional flood dispersion maps will be established with Hec-RAS software. As a result of 1D and 2D flood analysis on Sakarya river, carrying capacity of river was found to be insufficient for flood flow rates Q100 and Q500. This insufficiency exposes local residents, social activities and recreation areas, D650 highway and high-speed railway to floods. Keywords Global warming · Climate change · Precipitation · Flood · Geyve · Sakarya
1 Introduction Due to increasing population and growing urbanization in world, global warming and impact of melting glaciers increase climate change day by day. Accordingly, sudden and severe rains, storms and floods occur in some regions and droughts in other regions. Floods * Gokmen Ceribasi [email protected] Ahmet Iyad Ceyhunlu [email protected] 1
Department of Civil Engineering, Faculty of Technology, Sakarya University of Applied Sciences, Sakarya, Turkey
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Natural Hazards
are natural disasters depending on climate and topographic characteristics of region. These natural disasters cause loss of lives and property as well as damage to agricultural fields, infrastructures and transportation systems and cause diseases (Mason et al. 2010; Rozalis et al. 2010; Kryžanowski et al. 2014; Sowmya et al. 2015; Akkaya 2016). On the other hand, according to a report published by United Nations, it is observed that the rate of migration from rural areas to cities continues to grow. In addition, it is estimated that world population will increase from 7 to 9.3 billion between 2011 and 2050. As a result, urban population is expe
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