CEE634-SURFACE WATER HYDROLOGY SPRING 2001 HOMEWORK NO. 2 Derive Eq. 2-36 in the book, i.e., Penman's equation. Given air temperature Ta = 20oC; net radiation Qn = 600 ly/day; wind speed v2 = 250 km/day; relative humidity RH = 75%; calculate the evaporation rate (cm/day) for the reference crop (clippled grass of 0.1 m height) using the Penman-Monteith method. Assigned: February 22, 2001 Due: March 6, 2001 Late: March 20, 2001.