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Late-Holocene landscape evolution of a delta from the foredune ridges: Seyhan Delta, the Eastern Mediterranean, Turkey
The Holocene ( IF 2.4 ) Pub Date : 2021-02-04 , DOI: 10.1177/0959683620988047
Emrah Özpolat 1, 2 , Eren Şahiner 3 , Orkan Özcan 1 , Tuncer Demir 4 , Lewis A Owen 2
Affiliation  

The Çukurova Delta Complex, formed by the Seyhan, Ceyhan, and Berdan rivers, is the second-largest delta system in the Mediterranean. The delta complex is a major depocenter that contains sediments transported from the Taurus Mountain belt since the Miocene. Studies on the Quaternary landscape evolution of the Çukurova Delta Complex are scarce, and in particular, the Holocene evolution of the Seyhan Delta section of the Çukurova Delta Complex has been poorly understood. Sedimentological analysis, high-resolution digital elevation models derived using structure from motion, and optically stimulated luminescence dating of the foredune ridges in the Seyhan Delta help define the lesser-known nature of Late-Holocene paleoenvironmental and landscape evolution of the Seyhan section of the Çukurova Delta Complex. The foredune ridges provide evidence that the Akyatan Lagoon, one of Turkey’s largest lagoon, formed at the beginning of the last millennium. The ridges bordering the north and south of Tuzla Lagoon show that the lagoon completed its formation between the 11th and 14th centuries when the ancient delta was to the east. The Seyhan River flowed 10 km east from its current course until at least the 16th Century, and its ancient delta was active until that time. After the 16th Century, the Seyhan River shifted to its current course in the west and began to build the modern delta and the youngest foredune ridges were formed by a combination of aeolian and littoral processes. The contemporary delta continued to prograde until the construction of the Seyhan Dam in AD 1956. Since the construction of the Seyhan Dam, the delta shoreline at the river mouth retreated drastically and foredune formation stopped. In the past few decades, most of the foredune ridges have been eroded away by coastal processes and agricultural activities.



中文翻译:

从前陆山脊三角洲的全新世晚期景观演化:Seyhan三角洲,东地中海,土耳其

由Seyhan,Ceyhan和Berdan河流形成的Çukurova三角洲综合体,是地中海地区第二大三角洲系统。三角洲复合体是主要的沉积中心,包含了自中新世以来从金牛座山带运来的沉积物。关于Çukurova三角洲复合体第四纪景观演化的研究很少,尤其是对Çukurova三角洲复合体的Seyhan Delta剖面的全新世演化了解甚少。沉积学分析,使用运动结构构造的高分辨率数字高程模型以及Seyhan三角洲前缘山脊的光学激发发光测年有助于确定ÇukurovaSeyhan段的晚全新世古环境和景观演化的鲜为人知的性质三角洲综合体。前额山脊提供了证据,证明土耳其最大的泻湖之一的Akyatan泻湖是在上个千年初形成的。与图兹拉泻湖的北部和南部接壤的山脊表明,泻湖在11世纪至14世纪之间是古老的三角洲在东方时就完成了其形成。塞汉河从目前的河道向东流出10公里,至少到16世纪为止,其古代三角洲一直活跃到那时。16世纪后,Seyhan河向西移动至目前的航向,并开始建立现代三角洲,而最年轻的前陆山脊则是由风沙作用和沿海作用共同形成的。当代三角洲持续发展,直到1956年西汉水坝建成。河口的三角洲海岸线大幅度后退,前缘形成停止了。在过去的几十年中,大多数前陆脊被沿海过程和农业活动侵蚀了。

更新日期:2021-02-05
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