Abstrait

The variation in physicochemical properties of water in Qarun Lake during four seasons.

Amal S Mohamed* , Mohamed A El- Desoky , Nahed S Gad

Lake Qarun is an inland closed basin, located about 80 Km south west of Cairo. It suffers from a serious water pollution problem which is due to uncontrolled solid and liquid domestic, in addition to agrochemical contamination and lack of sustainable wastewater management. The present study aimed to follow up the variation in the water quality of the lake Qarun through the determination of physicochemical properties of water seasonally (August 2014 to May 2015). The physicochemical parameters showed variations at different sites of Lake Qarun in four seasons. The results showed that the maximum mean value for temperature and EC was found in summer at the Main pump station. The minimum mean values of dissolved oxygen were found in summer but maximum mean values found in winter at the main pump station. On the other hand, the highest mean values of ammonia, nitrite, and nitrate were found at Al-Batts drain which the most highly polluted sampling site due to agricultural and sewage wastes discharged into Lake Qarun from this huge drain.