Question

A small catchment absorbs a mean daily radiation energy flux
*R _{n}*= 4200 W m

- Write a complete energy balance equation (include all terms) for the catchment for the month of August.
- Neglecting conduction to the ground (
*G*) and the change in energy stored, simplify your energy balance equation for the catchment so that it can be solved for the latent heat flux,*E*. Also, replace the term H (the sensible heat flux) with_{l}*B*E*(where_{l}*B*is the Bowen ratio. - Using a mean Bowen ratio of 0.24 for the catchment, calculate
the mean daily flux of latent heat to the atmosphere (W
m
^{-2}) and mean evapotranspiration rate (mm day^{-1})^{-3}from the catchment. Use a water density, ρ_{w}= 995 kg m. - Calculate the total evapotranspiration from the catchment during the month of August.

Answer #1

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