Author(s)

A.M. Negm, A.S. Al-Turbak, A.A. Alhamid & A.A. El-Sayed

Abstract

6 Analyzing and forecasting the ten-days natural flow of the Blue Nile using the periodogram technique A.M. Negm," A.S. Al-Turbak,* A.A. Alhamid,* A.A. El-Sayed" Water & Water Structures Engineering Department, College of Engineering, Zagazig University, Zagazig, Egypt Civil Engineering Department, College of Engineering, King Saud University, PO Box 800, Riyadh 1U21 KSA Abstract The periodogram or the spectrum analysis is a tool to investigate both the pattern and the hidden periodicities of the time series data. In this study, the continuous spectrum is applied to the series of the Blue Nile ten-days natural flow during the flood season at three main stations (Khartoum, Sennar, and Roseires). Also, the analysis includes the ten-days annual flow series. It was found that the periodicities of the Blue Nile natural flow are of complex nature. The pattern of the times series shows two main components viz. (periodicity and stochasticity). The tendency componen

Keywords