In the process of globalization, air transportation plays an important role for the development of regional and national economy. There has been considerably increasing demand for air transportation and will continue in the foreseeable future. In this respect this research demonstrates a case study of Sabiha G&ouml / k&ccedil / en International Airport, the second and recently built airport of istanbul, and its relation with the region. The main aim of this study is to understand the initial transportation benefits of the Sabiha G&ouml / k&ccedil / en International Airport investment.The objectives of the research are to understand the contribution of Sabiha G&ouml / k&ccedil / en International Airport to istanbul and particularly the Anatolian side, in terms of air travel mobility as well as savings in cost and time, to identify the current and potential role of Sabiha G&ouml / k&ccedil / en International Airport in the multi-airport system of istanbul and to assess the usage of the airport by analyzing the current customer profile in order to understand the spatial aspects of the current demand.

Multi-purpose project requirements lead to construction of large dams. In order to maintain the desired safety level of such dams, comprehensive inspections based on use of a number of precise instruments are needed. The ideal dam instrumentation system should provide time-dependent information about critical parameters so that possible future behavior of the structure can be predicted. New dams are normally equipped with adequate instrumentation systems. Most of the existing dams, however, do not have adequate instruments or current instrumentation systems may not be in good condition. By implementing the modern equipment to existing dams, the uncertainty associated with the impacts of aging or unexpected severe external events will be reduced and possible remedial measures can be taken accordingly. This study summarizes the major causes of dam failures and introduces the instruments to be used to monitor the key parameters of a dam. The concept of the instrument retrofitting to an unmonitored dam is highlighted through a case study. A sample system is proposed for G&ouml / k&ccedil / ekaya Dam, with reference to an investigation of the current condition of the structure. The deficiencies observed during a site visit are listed and the corresponding rehabilitative repair measures are suggested. Finally, different alternatives of a new instrumentation system are introduced and compared in terms of technical and economical aspects.

In this study a recent dam type, concrete face rockfill dam (CFRD), its design and behaviour is overviewed. The design features of G&ouml / k&ccedil / eler Dam are introduced as a case study. Selection of concrete face rockfill type for G&ouml / k&ccedil / eler Dam Project is discussed together with the other two alternatives, namely earth core rockfill (ECRD) and roller compacted concrete (RCC) dam. G&ouml / k&ccedil / eler Dam type selection as concrete face rockfill dam is also verified by an economic analysis conducted calculating internal rate of return for all alternative types. In cost analysis a currency independent defined unit cost (DUC) is specified to verify the time independent validity of the economic analysis.