A.H. Abo El-lil
Faculty of Science, Cairo University (Beni-Suif), Egypt
ABSTRACT
From 10-13 Oct. 1994, east bank of River Nile (east desert) at Assiut Governorate, Upper Egypt was subjected to huge amounts of rainfall in few days equal to those fall in one year or more. This unique ecological phenomenon leading to propelling the fine sand, silt and clay from surrounded dunes around the river Nile into its main branch. These particles were carried downward till reach Nile at Cairo and consequently lead to unfavourable changes in water colour from olive green into dark yellow and brownish colour. Water transparence altered negatively and off-course affected other physical parameters like DO2, redox pot., T.S.S., pH and caused considerable change in anions and cations contents, in addition to dramatic decrease of phytoplankton flora in water. The author be aware to study this unique phenomenon which did not happen for many decades and evaluate the alteration happen due to this phenomenon from physical, chemical and biotic view points, also comparing with features before the torrent period and recovering time needed to remove the impacted features.
PDF References Citation
How to cite this article
A.H. Abo El-lil, 2003. Evaluation the Ecological Impacts Due to Unique Torrent Phenomenon on Aquatic Ecosystem (River Nile, Cairo, Egypt). Journal of Biological Sciences, 3: 197-203.
DOI: 10.3923/jbs.2003.197.203
URL: https://scialert.net/abstract/?doi=jbs.2003.197.203
DOI: 10.3923/jbs.2003.197.203
URL: https://scialert.net/abstract/?doi=jbs.2003.197.203
REFERENCES
- Barko, J.W. and R.M. Smart, 1986. Sediment-related mechanisms of growth limition in submersed macrophytes. Ecology, 67: 1328-1340.
Direct Link - Badr, S.A., 1990. Changes in Nile water quality and their relation to phytoplanktonic distribution. Egypt. J. Bot., 33: 77-92.
Direct Link - Golterman, H.L., R.S. Climo and M.A.A. Ohnstad, 1978. Methods for Physical and Chemical Analysis of Fresh Waters. 2nd Edn., Blackwell Scientific Publications, Oxford, Pages: 213.
Direct Link - Hart, R.C., 1986. Zooplankton abundance, community, structure and dynamics in relation to inorganic turbidity. Fresh Water Biol., 16: 351-371.
Direct Link - Kirk, J.T., 1985. Effects of suspensoides turbidity on penetration of solar radiation in aquatic ecosystems. Hydrobiologia, 125: 195-208.
CrossRefDirect Link - Madson, J. and M.S. Adams, 1989. The distribution of submerged aquatic macrophyte biomass in eutrophic stream. Hydrobiologia, 171: 111-119.
CrossRef - Petticrew, E.L. and J. Kalff, 1992. Water flow and clay retention in submerged macrophytes beds. Can. J. Fish Aquat. Sci., 49: 2483-2489.
Direct Link - Talling, J.F. and J. Rzoska, 1967. The development of plankton in relation to hydrological regime in blue-nile. J. Ecol., 55: 637-662.
Direct Link