Operator`s manual

64
Installation, Operation and Maintainance of Buoy Operated Automatic Meteorological Stations
Evaporation Rate E
E = (1.74 /
v
w ) x / ( + y) x (R
n
- ES)
Inserting in this formula the values calculated above, it follows that:
E = (1.74 / (2450 * 0.99836 x 10
6
) x 0.145 / (0.145 + 0.066) x (13.27 – 3.13) x10
6
E = 5.0 x 10
-3
[M day
-1
]
Thus, the open water evaporation for this particular situation is estimated at 5.0 mm per day.
The reader should note that the specified conditions do not represent the actual Lake Nasser environment and are
solely used for demonstration purposes.
5. References
Dingman, S. L. (1993) Physical Hydrology, Macmillan Publishing Company, New York
Fawzy, A (2003) Private notes
Maidment, D. R. (et al) (1992) Handbook of Hydrology, McGraw-Hill Inc., New York
Annexes