Investigation of Aksehir and Eber Lakes (SW Turkey) Coastline Change with Multitemporal Satellite Images

Abstract

Detection and analyses of coastline changes are an important task in environmental monitoring. Several factors such as geology, hydrology, climate impact, environmental problems etc. play an important role in this change. The main objective of this study is to determine coastline change in the Aksehir and Eber lakes (SW, Turkey) by using different remote sensing methods on the multitemporal satellite images. In present study, Landsat MSS (1975), Landsat TM (1987), Landsat ETM+ (2000) and ASTER (2006ASTER ( -2008 satellite images were used. In order to explain reasons of coastline change, geological, hydrogeological and hydrological investigations were carried out. Also, surface area and volume calculations were performed with the aid of bathymetric map which was digitized by using the Arc GIS 9 version software program. The obtained data show that precipitation, evaporation and surface flow are effective in the Aksehir and Eber coastline change. The Eber Lake was evaluated with level measurements due to aquatic plants covered surface of the lake. The coastline change of the Eber Lake is related to hydraulic factors. The Aksehir Lake volume and surface area have decreased 1.11 km 3 and 257.95 km 2 , respectively from 1975 to 2006 years. Furthermore, the Lake Akşehir was dried up completely in 2008.

Changes in the Coastline and Water Level of the Akşehir and Eber Lakes Between 1975 and 2009

“…Lake water level records for two stations were averaged to obtain yearly records of lakes level variations dating back to 1965. Evaporation over the lakes were calculated by Tezcan et al (2002) and Sener et al (2009) based on Penman-Monteith method. Evaporation data calculated until 1998 were taken from Tezcan et al (2002) and other data were also calculated by Sener et al (2009).…”

“…In Turkey, most lake monitoring studies that use remote sensing have been conducted to assess the water level because of changes in climate and human activities such as the Salt Lake (Ormeci and Ekercin 2007), Ulubat Lake (Taǧıl 2007), Seyfe Lake (Reis and Yılmaz 2008) and Akşehir and Eber Lakes (Sener et al 2009). …”

Shoreline changes along the Kutubdia Island, south east Bangladesh using digital shoreline analysis system

“…These dataset might provide a variety of means to analyze the rates of changes of shoreline position. It is well documented that Remote Sensing together with Geographic Information System (GIS) can quantify the coastal processes, erosion and accretion especially in the last decades ( Durduran 2010, Sener et al 2010 and being used as a robust combined tool for the coastal vulnerability assessment as well. Various methods for coastline extraction from optical imagery have been developed (Bosworth et al 2003, Di et al 2003, Foody et al 2005, Dewidar and Frihy 2008.…”

GIS based beach sand budget analysis through seasonal beach profiling using cartographic techniques

“…The interpretation of coastal dynamics in various forms has attracted many early researchers (Anthony et al 2006;Sener et al 2009;Cracknell 1999;Cracknell and Hayes 1991;Huang et al 1991). Beach profile studies give information on cyclic/seasonal morphological changes in the coastal area which are essential to identify the erosional and depositional features, which in turn help to understand changes in oceanographic processes in the coastal areas.…”

“…Beach profile studies give information on cyclic/seasonal morphological changes in the coastal area which are essential to identify the erosional and depositional features, which in turn help to understand changes in oceanographic processes in the coastal areas. (Anthony et al 2006;Bhattacharya et al 2003;Chang 2007;Ganesan and Gaonkar 2006;Ikeda and Dobson 2005;Maiti and Bhattacharya 2009;Pethick 1990;Paul 2002;Pacheco et al 2008;Ramasamy and Kasturirangan 2005;Ramana Murthy et al 2008;Selby 1985). The foreshores of the beaches including the surf zone are very interesting as they keep changing time and again.…”