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The Nile pp 157-162 | Cite as

The Toshka Lakes

  • Gamal M. El-Shabrawy
  • Henri J. Dumont
Part of the Monographiae Biologicae book series (MOBI, volume 89)

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.

Keywords

Safety Valve Nile Perch Side Valley Nile Basin Main Lake 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

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Copyright information

© Springer Science + Business Media B.V 2009

Authors and Affiliations

  • Gamal M. El-Shabrawy
    • 1
  • Henri J. Dumont
    1. 1.Fish Research Station, El-KhanaterNational Institute of Oceanography and FisheriesEl-KhariaEgypt

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