الفهرس 
L1TRATURE REVIEWOnly 14 pages are availabe for public view
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Abstract
Evaporation is defined as the transmission of water from any free liquid
water surface to the atmosphere at a temperature below the boiling point
of water. It represents one of the main components of water budget.
Therefore, knowledge of which is indispensable for the solution of
numerous water management problems. Reliable evaporation data are
also necessary for planning and development of reservoirs. However, due
to the interaction between many factors controlling the amount of water
lost by evaporation, no universally recognized method is known for its
computation. In Egypt, due to the limited water budget it is important to
use water more efficiently. As a result looking for water loss reduction
methods comes top on the country’s priorities. This research introduces
computations of water lost by evaporation from water surface areas of
Lake Nasser. Many alternatives to reduce evaporation are tried and
evaluated. The study concluded that lake development by blocking the
secondary channels is efficierit. Also cultivating the lake surface area by
rice and lowering the upstream levels of HAD are efficient alternatives of
decreasing the evaporation losses.