Abstract
This paper studies the influence of fluctuation of the Nile River level on water composition. The Nile River could be classified to four periods according to level. The periods are flood, intermediate, drought and intermediate. The present study investigates the biological and chemical analysis of water at all periods of the Nile River. The results show that the algae count ranged from 221 to 2,069 organism/ml during flood and drought periods respectively. By contrast, the change in the concentration of chemical elements was very slight, whether in the period of drought or flood period. This means that the fluctuation of the Nile River level had a significant impact on its biological nature rather than chemical nature. It could be argued that this is due to the algae's ability to absorb chemical elements.