STUDIES ON THE EFFECT OF DRAIN EFFLUENTS ON THE WATER QUALITY OF LAKE MANZALA,EGYPT. | ||
| Egyptian Journal of Aquatic Biology and Fisheries | ||
| Article 4, Volume 11, Issue 2, April 2007, Pages 65-78 PDF (851.01 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/ejabf.2007.1934 | ||
| Authors | ||
| Abdel -Samei Elewa1; Mohamed Ghallab1; Mohamed Shehata1; Ebtisam Saad2 | ||
| 1National Institute of Oceanography and Fisheries, Inland Water Branch | ||
| 2Chemistry Department, Faculty of Science, Ain Shams University, Cairo, Egypt. | ||
| Abstract | ||
| The water quality of Lake Manzala was studied seasonallyJ during the period from autumn 2000 to summer 2001. The results of physical parameters revealed that the values of transparency at the southern region are relatively low and reflect the type of effluents, characterized by high amounts of floating materials, which decrease the water transparency. Moreover, the electrical conductivity at these stations were somewhat high as a result of sewage and industrial wastes at that region. On the other hand, the chemical analysis of water showed high values of chemical oxygen demand (COD) and biological oxygen demand (BOD) but low levels of dissolved oxygen (DO) especially at the southern region opposite to Hadous and Bahr El-Baqar drains, in addition to high levels of trace metals. | ||
| Keywords | ||
| water quality; trace metals; agricultural wastes; Lake Manzala; drain effluents | ||
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