Derive the Penman equation (Eq. 2-36, page 46 of text).
Verify Example 2-5 in the text by running PENMAN in onlinehydro.sdsu.edu.
Calculate the evapotranspiration rate of the reference crop (clipped grass 0.12-m high)
by the Penman-Monteith method for the month of March, with the following atmospheric conditions:
air temperature Ta = 20 oC;
net radiation Qn = 600 cal/cm2/d;
wind speed v2 = 200 km/d;
relative humidity RH = 70%; and
atmospheric pressure = sea level (1013.2 mb).
Verify your results of Problem 3 by running PENMAN-MONTEITH in onlinehydro.sdsu.edu.
Using PENMAN-MONTEITH, study the sensitivity of the reference crop evapotranspiration to the relative humidity.
Vary RH between 0% and 100% and report the results. What is the ratio of ETo for RH= 0% to RH= 100%?
Given the reference crop (clipped grass 0.12-m high), with air temperature Ta = 20 oC;
net radiation Qn = 600 cal/cm2/d; and atmospheric pressure = sea level (1013.2 mb).
At what wind speed will the RH=0%/RH=100% ratio equal 2?
Use THORNTHWAITE in onlinehydro.sdsu.edu to calculate the annual PET for Ramona (32oN)
with the following mean monthly temperatures (January to December): 11. 13. 14. 16. 18. 21. 22. 20. 18. 16. 12. 12.
Verify Example 2-6 in the book by running BLANEY-CRIDDLE in onlinehydro.sdsu.edu.
Verify Example 2-7 in the book by running PRIESTLEY-TAYLOR in onlinehydro.sdsu.edu.