Engineering geological evaluations of Bogaçay (Antalya) coastal plain [Bogaçay (Antalya) ki{dotless}yi{dotless} ovasi{dotless}'ni{dotless}n mühendislik jeolojisi degerlendirmeleri]

Effects of engineering works on the natural system during urbanization on a coastal plain,and effects of geological processes on a city are the research areas of engineering geology discipline. coastal plains are under effect of natural processes such as flood,coastal erosion,earthquake,sediment accumulation and groundwater level change. in this study,engineering geological issues which should be considered for a coastal plain were examined for bogaçay coastal plain (antalya) case. geology of the plain was defined,engineering properties of the geological units were explained,natural processes which may affect residential areas were determined,residential facilities were examined in accordance with the natural conditions,and solutions were recommended for the purpose of land-use. bogaçay coastal plain is one of the most attractive region of antalya for its touristic,natural,agricultural,and economical values. some foundation problems were encountered on buildings constructed on the plain. soil profile in lagoonal deposits is complex. allowance of high rise buildings and engineering mistakes are the other problems. the plain is located in the middle of three active fault zones. due to the existence of very thick and soft soil near the surface,the earthquake intensities will be greater on the soil surface as compared to rock the strata lying at greater depths. sand,gravel and rock quarries in the area destroyed the nature and caused some environmental problems. excessive quarrying has resulted in reduction of sediment supply to konyaalti{dotless} beach and thus promoting coastal erosion. there is high flood risk on the plain due to the existence of steep topography and high rainfall rates in the surrounding area. based on engineering geological criteria,it is required to revise the current urban plans due to problems of the existing residential plans and high risk for densely populated areas.