atmospheric pressure (mbar)
The figure above gives the specific humidity as a function of the atmospheric
pressure. Use this figure to determine the total amount of water vapour expressed in
mm liquid water. Use par. 1.3 from Shaw et al. and take an appropriate number of
Assume that from this calculated total amount of water vapour on average daily 10
% reaches a catchment as precipitation. Then calculate the annual
evapotranspiration in mm for a catchment with a surface area of 46 000 km² and an
average discharge of 1650 m³/s.
Which assumption(s) were necessary to answer the previous question?
What kind of climate are we dealing with (comparable to the Netherlands or
differently)? Motivate your answer.
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