Active shoreline changes of büyük menderes river delta in the last 50 years


Lütfi Süzen M. L. , Rojay B.

7th International Conference on the Mediterranean Coastal Environment, MEDCOAST 2005, Kusadasi, Türkiye, 25 - 29 Ekim 2005, cilt.2, ss.1309-1316 identifier

  • Cilt numarası: 2
  • Basıldığı Şehir: Kusadasi
  • Basıldığı Ülke: Türkiye
  • Sayfa Sayıları: ss.1309-1316

Özet

The coastal face of Büyük Menderes River is characterized by a complex system of lagoons, inlets, lakes, natural levees, beach ridges and river promontories. The geomorphological aspects of this complex system had been studied by means of aerial photographs and archive topographical maps. Three different periods of dataset is used where the earliest set is dated as 1956-1963, the next as 1977-1980 and the most recent one as 1996. In addition to aerial photographic studies, field observations have been made in 77 different locations in summer of 2004. It is observed that the most active parts of this shoreline are the promontories of Büyük Menderes River. One active and one relict promontory (northern and southern deltas) are observed with two different river courses. Two large lagoons are located behind the beach ridges of the shoreline. The so called Dil Lake -a large Lagoon- lies in the north part of the active promontory and joined with 2 inlets to the Aegean Sea as observed on aerial photographs and in field surveys done in 2004. The other one known as Akköy Lagoon is located on the south of the active promontory and also contiguous to the relict one. In year 2004, the Akköy Lagoon has 3 main inlets. The major changes detected in the shoreline between the observed dates are concentrated in the closure of inlets, formation of new sand barriers, slight changes in the course of the sand beaches and in the shape of promontories. It is expectably observed that the active promontory continues to aggrade since 1956 to 2004 for 50 years. However, on the other hand, the ceased promontory after a certain aggradation until 1963 is degrading continuously as a result of the human control and change in the southern course of Büyük Menderes River.