الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
Providing safe and secure water to people around the world, and promoting sustainable use of water are fundamental objectives. Civilization related activities e.g. manufacturing, mining, construction, runoff from agricultural areas, and discharge of treated and untreated sewage transportation are among the major reason for deteriorating the water quality, especially in developing countries). This is the case for the River Nile in Egypt which considered the principal artery of life in Egypt comprising about 97% of the existent water supplies. The Nile water quality is characterized by high nutrients concentrations (maximum of nitrates, 0.63 mg/L; nitrite, 0.472 mg/L; ammonia, 2.83 mg/L; total nitrogen, 3.48 mg/L; phosphates, 0.461 mg/L; total phosphates, 0.53 mg/L; sulfates, 62.57 mg/L and silicates, 3.50 mg/L) at some locations (e.g. El-Nasria).This is obviously influenced by the quality of water coming from El-Nasria Pumping Station. A recognizable depletion in Hydrogen ion concentration (pH) and dissolved oxygen (DO) was recorded at this site. The mathematical statistical estimation of Water Quality Index (WQI) were help to categorize the Nile water quality at this segment to be ranged from medium/fair to poor quality status. The study aimed, also, at investigating the composition, abundance and the local and monthly development and distribution of phytoplankton along the study area. A total of 216 different planktonic algal taxa belonging to 51 genera were identified. Chlorophyta (98), Ochrophyta (59), Cyanophyta (29), Euglenophyta (15) and charophyta (14) were the most important algal groups contributing to the total taxa identified during the period of study. Results refereed to Site 4 (El-Nasria) as the highest polluted site throughout the study long in response to excessive and unrecompensed activities at some villages nearby as well as the wastewater runoff. The study recommended (i) divert the polluted water away off the River Nile; (ii) a better treatment technique to be applied to wastewater pumped to El-Nasria site via El-Nasria Pumping Station. Application of a reliable and continuous monitoring methodology along the whole River is a crucial demand to mitigate health problems outbreaks or any aquatic ecosystem disorders.