Modelling long term morphological changes with XBeach case study of Kizilirmak River mouth

Date

2015-04-17

Author

Baykal, Cüneyt
Güler, Işıkhan
Özyurt, Gülizar
Söğüt, Erdinç
Güler, Hasan Gökhan
Doğan, Gözde Güney

Metadata

Show full item record

Item Usage Stats

290
views

0
downloads

The Bafra alluvial plain, where the Kızılırmak River discharges into the Black Sea, is one of the most critical examples of severe coastal erosion problems in Turkey. The amount of sediment carried by the Kızılırmak River has decreased from approximately 23 million ton per year to 0.46 million tons/year starting from 1960s as a result of construction of flow regulatory structures in the following years. This drastic decrease in the amount of sediment carried by the river resulted in a severe shoreline retreat up to 1 km in the cross-shore direction since 1988 according to the Regional Directorate of State Hydraulic Works and local residents (Kökpınar et al., 2007). The first remedial measure against this severe coastal erosion problem at the river mouth was constructed in 2000 by State Hydraulic Works (DS ˙ I). It was composed of two Y-type and one I-type groins constructed at the eastern shoreline of the river mouth. After construction of the first remedial system, the shoreline retreat slowed down between the groins and trapping of sediment initiated. Today, the gaps between the groins are almost completely filled with sediment. In this study, the shoreline changes between the groins of the first remedial system for the years 1999, 2003 and 2007 are studied using the open source numerical model called XBeach (Roelvink et al.2010) focusing on the hydrodynamics and tombolo formation around the groins. The numerical model has been developed mainly to model short term morphological changes such as nearshore responses under storm and hurricane conditions. Herein, the preparation of the wave data input to minimize the computational demand of the model and the effect of the sequence of the input wave directions are discussed in detail in this study. Finally, the shoreline changes obtained from numerical model simulations are compared with the field data.

Subject Keywords

Numerical modeling of shoreline changes, Tombolo formation

URI

https://hdl.handle.net/11511/76179

Conference Name

European Geosciences Union General Assembly 2015, (12 - 17 April 2015)

Collections

Department of Civil Engineering, Conference / Seminar

Suggestions

OpenMETU
Core

Evaluation of tsunami scenarios for western Peloponnese, Greece Yalçıner, Ahmet Cevdet; Dilmen, D. I.; Aytore, B.; Ayca, A.; Insel, I.; Zaytsev, A. (2014-06-01) Tsunami hazard assessment of the eastern part of the Mediterranean Sea is the current interest of the countries having, a coastline in this region. Considering today's increasing population on the coasts and historical tsunamis, it is essential to estimate the probable tsunami risk, which might occur, to be able to mitigate the risk before the actual tsunami event happens. For this purpose, European Union funded project., SEAHELLARC is formed to develop a methodology and tools for seismic and tsunami safety...
Numerical simulation of the Çınarcık dam failure on the Orhaneli River Bağ, Fırat; Bozkuş, Zafer; Department of Civil Engineering (2005) This thesis analyzes the probable outcome of the fictitious failure of a dam under a set of pre-defined scenarios, within the framework of a case study, the case subject being the Cinarcik Dam located within Bursa Province of Turkey. The failure of the dam is not analyzed neither structural nor hydraulic-wise but is assumed to be triggered when certain critical criteria are exceeded. Hence, the analyses focus on the aftermath of the failure and strive to anticipate the level of inundation downstream of the ...
Analysis of extreme rainfall trend and mapping of the Wadi pluvial flood in the Gaza coastal plain of Palestine Al-Najjar, Hassan; Purnama, Anton; Özkan, Korhan; Abualtayef, Mazen (2022-09-01) In the eastern Mediterranean region of the Middle East and North Africa, pluvial flooding has become a common and severe climate change consequence event that requires immediate attention. The Wadi-Gaza basin is a critical source of surface water in Palestine; nevertheless, climate change and anthropogenic processes are altering the basin's hydrological features, resulting in a series of extreme and disastrous flooding events in the coastal plain at the basin downstream. The Mann-Kendall test, Sen's slope e...
A review of plastic pollution in aquatic ecosystems of Turkey Çevik, Cem ; Kıdeyş, Ahmet Erkan; Tavşanoğlu, Ülkü Nihan ; Kankılıç, Gökben Başaran ; Gündoğdu, Sedat (2021-12-01) Turkey is one of the major plastic pollution sources in the Mediterranean and the Black Sea. This review summarizes present information, data, and legislation on plastic pollution in Turkish aquatic ecosystems. According to results derived from reviewed studies, both macro- and microplastic pollutions were documented in Turkish aquatic ecosystems. Most of the studies on plastic pollution in Turkish waters were performed in the marine environment while only four were conducted in freshwater environments. Spa...
Evaluation of heavy metal contents, polyaromatic petroleum hydrocarbons and some inorganic pollutants in the south Marmara rivers, Turkey Yılmaz, Ayşen; Yemenicioglu, S; Aksoy, S; Torunoglu, T (1998-05-01) Nilufer River is the main receiving body of water for the industrial and domestic wastes of 1.000.000 populated Bursa metropolitan area and it combines with Kocasu River before entering the sea at the south Marmara region, Turkey. Variations in concentrations of Na, K, Ca, Mg, Fe, Cl, SO4, PO4, NH4, NO3, NO2, BOD5, COD, polyaromatic petroleum hydrocarbons (PAH), pH and some heavy metals (Hg, Cd, Cr, Zn, Pb) were seasonally determined in 1991-94 period. The results showed that these rivers are included in th...

Citation Formats

C. Baykal, I. Güler, G. Özyurt, E. Söğüt, H. G. Güler, and G. G. Doğan, “Modelling long term morphological changes with XBeach case study of Kizilirmak River mouth,” presented at the European Geosciences Union General Assembly 2015, (12 - 17 April 2015), Viyana, Austria, 2015, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/76179.