Jeoloji Mühendisliği Dergisi

ABSTRACT: Effects of engineering works on the natural system during urbanization on a coastal plain, and effectsof geological processes on a city are the research areas of engineering geology discipline. Coastal plainsare under effect of natural processes such as flood, coastal erosion, earthquake, sediment accumulationand groundwater level change. In this study, engineering geological issues which should be considered fora coastal plain were examined for Boğaçay coastal plain (Antalya) case. Geology of the plain was defined,engineering properties of the geological units were explained, natural processes which may affectresidential areas were determined, residential facilities were examined in accordance with the naturalconditions, and solutions were recommended for the purpose of land-use. Boğaçay coastal plain is one ofthe most attractive region of Antalya for its touristic, natural, agricultural, and economical values. Somefoundation 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 soilnear the surface, the earthquake intensities will be greater on the soil surface as compared to rock thestrata lying at greater depths. Sand, gravel and rock quarries in the area destroyed the nature and causedsome environmental problems. Excessive quarrying has resulted in reduction of sediment supply toKonyaaltı beach and thus promoting coastal erosion. There is high flood risk on the plain due to theexistence of steep topography and high rainfall rates in the surrounding area. Based on engineeringgeological criteria, it is required to revise the current urban plans due to problems of the existingresidential plans and high risk for densely populated areas.  

ABSTRACT: Landslides are one of the most destructive natural hazards which frequently occur after earthquakesin our country and in the world. From engineering point of view, prediction of landsliding before itsoccurence has a great importance to mitigate the landslide related damages, and determination oflandslide prone areas by the methods, based on probability, has spread out both in our country and in theworld in the last two decades. In this study, a comparison of the most common landslide susceptibilitymapping methods, namely bivariate, multivariate statistical and heuristic methods, were carried out. Forthis purpose, Ayvalık (Balıkesir) and its near vicinity were selected as study area, and in total 45landslides were mapped. Morphologic, geologic and land-use data were produced in GeographicalInformation Systems (GIS) by using available topographical and relevant thematic maps. In the area,slope gradient and aspect, lithology, weathering conditions of the rocks, stream power index (SPI),topographical wetness index (TWI), distance from drainage, density of structural features, land-cover andvegetation cover density were considered as the parameters causing the landslides. All of the parameterswere standardized in a common scale by using fuzzy membership functions. Then, the contribution of eachof these parameters for the landslide occurrence were investigated by likelihood ratio, logistic regressionand analytical hierarchy methods, and the weight values of the parameters were calculated. Consideringthe weight values determined by each method, landslide susceptibility maps were produced, and theperformances of the produced maps were tested by comparing landslide locations using Area UnderCurvature (AUC) approach. Based on this, the AUC values were determined to be 0.76, 0.77 and 0.89 forlikelihood ratio, logistic regression and analytical hierarchy models, respectively. Accorrding to theseresults, analytical hierarcy model was considered to be the best landslide susceptibility method for thestudy area. 

ABSTRACT: Travertine, which is a type of chemical sedimentary rock and is composed of calcium carbonate, has arelatively recent formation age when compared to most rocks. Nevertheless, weathering in travertines maybe quite effective in short time span due to their physical structures and chemical compositions. Despitethe intensive use in building stone market, the weathering of travertine in rock mass scale has not beeninvestigated yet. In this study, the Eskipazar yellow travertine having an intensive usage in travertineindustry in Turkey as well as employed in the construction of Anıtkabir is selected as study material. Theweathering mechanism of the yellow travertines is revealed through observational studies and massmeasurements on exposures with different degrees of weathering in the field. As a consequence of thesestudies, an objective and practical weathering classification is proposed by preparing descriptive criteria.Accordingly, four different weathering classes - fresh, slightly weathered, moderately weathered andhighly weathered - are distinguished for the yellow travertines in rock mass scale. It is thought that the

ABSTRACT: Rapid growth of population, urbanization and industrialization are known as the most importantelements that constitute environmental problems. One of the most important environmental problems inour country is the problem originated from solid wastes, and also garbage amounts increases with theincreasing population. The need for the landfill areas is important for the environment and human healthin our country like in the developed countries. In this study, detailed geological and hydrogeologicalinvestigations were carried out to determine the solid waste landfill area in old clay mines in the city ofKırıkkale, Bedesten locality chosen from the alternative areas. The main lithology of the landfill areaconsists of CL-CH soils belonging to the İncik and Kızılırmak formations. The site is preferred because theselected landfill site is an old clay mine, practically impervious, easy to drain the leaking water andrequires no extra excavation cost.