Author(s): Yahya KADIO?LU, Ömer GÜNER, Gülferiye ÖZKAN
The coastal line, which is the boundary between land and sea, is in a continuous process of change due to natural and human factors. This change has important socio-economic consequences, it has been the subject of geographical research. Kocadere delta which is located within the borders of Milas district of Mu?la province, is an important area in terms of coastal line changes. A recession of about 65 meters was detected (1964-2014) at the old outfall of the Kocadere delta, covering one of the most important beaches of the district of Milas. The obvious recession outside of this area is seen between the Girme Cape spur and the old spur no: 4 (dismantled). The recession seen here reached 24 m at its widest place. While the progress was dominant in the Ören beach on the eastern part of the delta between 1964 and 1992, no significant change has been observed as a result of change of the river bed after the 1990s. Obvious progression area on the coastline has taken place along the new outfall in Kocadere. Almost 50-meter coastline progression at the new outfall has been observed. Apart from this, new coastal areas have formed along the western sides of the coastal art structures made on the coastal area since 2004, and the coastline has progressed. The recession seen locally from the Fener Spur to the west has adversely affected sea tourism in this area. The aerial photographs and satellite images used in this study were obtained from HGK Cas (1964- 1992) and Google Earth Pro (2004-2014), respectively. Qgis 3.4 software was used both for map production and analysis. Field trips to the region were made and photographs were taken.