Sürdürülebilir Kalkınma Amaçları

• 1

• MakaleYalnız künye2021/r/gumushane/13316
  A copula approach for sea level anomaly prediction: a case study for the Black Sea

  Yavuzdoğan, Ahmet; Tanır Kayıkçı, Emine

  Forecasting future sea levels is of great importance in terms of the conservation of coastal areas, monitoring and forecasting coastal ecosystems, and the maintenance and planning of coastal structures. In addition, highly accurate sea level forecasts allow adequate water management policies and coastal infrastructures to be developed. Today, many methods, such as harmonic analyses, artificial neural networks and support vector machines, are used to predict sea level anomalies. In this study, a novel approach based on Copula functions is presented for the prediction of sea level anomalies. The primary purpose of this study is to examine the applicability and capability of Copula-based prediction models in predicting short-term variations in the sea level. The minimum 95% correlations and minimum 22 mm RMSE values in sea level anomaly predictions during the testing period indicate that the Copula approach can be a powerful tool in the prediction of sea level anomalies.

  • 
  İncele
• MakaleYalnız künye2016/r/gumushane/12937
  Comparison of local geoid height surfaces, in the province of Trabzon

  Karaaslan, Özge; Tanır Kayıkçı, Emine; Aşık, Yusuf

  In this study, the estimation of a local geoid model in the area of Trabzon by using geometric methods is presented. The geometric method used in this study interpolates Global Positioning System-derived ellipsoidal and orthometric heights by using the weighted average interpolation, polynomial surface regression, and multiquadratic interpolation. The orthometric and ellipsoidal heights measured at 600 C3 order control stations within a reference benchmark network covering the entire area of Trabzon in Turkey were used in this study. From the existing orthometric and ellipsoidal heights at control stations, the geoid heights were determined. Control stations were divided into two sets, namely, “reference stations” and “testing stations,” to test the estimated geoid height surface. The three methods are compared from a practical point of view by using the descriptive statistics of the root mean square error, mean absolute error, maximum error, and minimum error of the geoid height residuals.

  İncele