The Toshka Lakes
As Lake Nasser—Nubia became filled to capacity in the 1990s, a side valley (the “New Valley”) to the west of the main lake at Khor Toshka was flooded. Around 2002, this had created four additional lakes, with a maximum surface area of ca 1,500 km2, holding about 5 × 109 m3 of water. Part of this evaporates, and part recharges the underlying aquifer. Around 2006, however, with a dwindling water supply, the lakes had started shrinking, and lake 3 even dried out. At the beginning of the flooding, a more or less truncated Nile fauna and flora invaded the Toshka valley, and soon up to 7,000 t of fish (mainly Tilapia and Lates) was harvested from the lakes, but currently the westernmost lake shows a rapidly increasing salinity. The zooplankton, for example, reacts by a striking impoverishment.
KeywordsChromium Phytoplankton Turbidity Macrophyte Egypt
Unable to display preview. Download preview PDF.
- Allan, J. A., 2009. Nile Basin asymmetries: a closed fresh water resource, soil water potential, the political economy and Nile Tran boundary hydro politics. In H. J. Dumont (ed.), The Nile. Monographiae Biologicae, Springer, Dordrecht.Google Scholar
- Anonymous, 2005. Integral studies on the wise use of Toshka flooded water. Environmental characters of the flood water. Environment and Climate Research Institute of Egypt, Egypt, 320 pp.Google Scholar
- Bayoumi, M. & K. Abu-Zeid, 2001. Environmental impact assessment of the south Egypt development project (Toshka project). Water Sciences 30: 10–18.Google Scholar
- El Bastawesy, M., S. Arafat & F. Khalaf, 2007. Estimation of water loss from Toshka Lakes using remote sensing and GIS. 10th AGILE International Conference on Geographic Information Science. Aalborg University, Denmark, pp. 1–9.Google Scholar
- Eugene, Y., B. Eileen, M. Sultan & B. Richard, 2003. Hydrologic impacts of Lake Nasser and the Toshka lakes on the Nubian aquifer in SW Egypt. Seattle Annual Meeting (2–5 November 2003). Washington State Convention and Trade Center.Google Scholar
- Yakoub, N. R., M. El Kady & F. A. Farag, 2002. Water resources management using remote sensing and GIS Technologies. Case study: Toshka project as a new settlement. Proceedings of the Seventh Nile 2002 Conference. Comprehensive water resources development of the Nile Basin, Cairo, Egypt 52.1–52.16.Google Scholar