Apprasial of hydrological forecasting methods applied on data in Türkiye

ABSTRACT APPRAISAL OF HYDROLOGICAL FORECASTING METHODS APPLIED ON DATA IN TÜRKİYE AYTEK, Ali M.S. in Civil Engineering Supervisor: Asst. Prof. Dr. Mazen KAWAS January, 1997 127 pages The purpose of this study is to examine the hydrological forecasting methods which are commonly used in other countries and apply it on data obtained from regions within Türkiye. These methods were applied on Ceyhan River Basin in this study. 30 years of the river flow data of five stations were taken into consideration in the calculations. Then, the same methods were applied on Seyhan River Basin for accuracy of calculations. The estimation of river discharge from the relevant basin by using runoff data is required for planning of water resources projects. If the existing data is not sufficient, then, regional relationship methods are used. Data application was made in two different ways, long-term forecasting, and short-term forecasting. The development of the technique involves the processing of hydrological and meteorological observation data according to definite systems and the determination of the relationship between the various factors by means of graphs and formulas. Finally, the goodness-of-fit was investigated by comparing the calculated variables with the observed ones. Forecast error was estimated and river flow for future years were found for the basins in concern. Key Words: Hydrological Forecasting Methods, River flow forecasting, Basin, River Flow, Runoff, Prediction