Instructions
Problem: Evaporation Rate!
• Choose a lake for which someone has estimated a typical evaporation rate.
• Do the best you can to find for your lake the following predictor variables for typical evaporation rate: typical wind speed, typical air temperature, typical water temperature, typical relative humidity.
• State all of the above information with your sources.
• If you were able to find all of the relevant predictor variables, use the mass-transfer equation (3.47) in Dingman to predict the evaporation rate. Discuss any discrepancies between your prediction and someone else’s estimate.
• If you were not able to find all of the relevant predictor variables, discuss the values of the missing predictor variables that would be needed to make the evaporation rate predicted by the mass-transfer equation (3.47) in Dingman match someone else’s estimate of the evaporation rate. Discuss the likelihood of the necessary missing predictor variables. If the required values of the missing predictor variables seem unlikely, please discuss the discrepancy.
Evaporation Rate (mm/yr) Ave. Water Temp C Ave Air Temp C Wind Speed (m/s) Humidity Ke
1168.4 10 6.9 6.99 81 1.29E-08
E=Ke*U(zm)*[e(zs)-e(zm)] Saturated Vapor Pressure at Zm e(zm) e(zs)
Pa 995.3256123 806.2137459 1228.364703 3.81885E-08 1.205138277
kPa 0.995325612 0.806213746 1.228364703
Ave. Water Temp 10
Ave. Air Temp 6.9
Ave Wind Speed 6.99
Humidity 81
Ke 1.29E-08
Please use this article
http://thescipub.com/PDF/ajassp.2008.934.942.pdf
Dead Sea Rate of Evaporation – Science Publications
thescipub.com
Am. J. Applied Sci., 5 (8): 934-942, 2008 936 Because the Woutflow from the Dead Sea is caused mainly by evaporation where the flow into ground
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