Hargreaves, B. R. Lehigh University, brh0@lehigh.edu
Farkas, K. L. Lehigh University, klf2@lehigh.edu

 
LAKE EVAPORATION: SHORT-TERM MASS TRANSFER AND ENERGY BUDGET MODELS TESTED WITH LAKE AND PAN DATA
 
To estimate lake evaporation rates, models based on thermal energy budgets are generally considered more robust than mass transfer evaporation models based on wind speed and vapor pressure deficit. Problems with mass transfer models include the requirement for a unique scaling parameter for each lake, and warm water induced "thermals" in cool air which can destabilize the laminar flow upon which a scaling parameter is based. In NE Pennsylvania two small lakes and a shore-based evaporation pan were monitored hourly for wind speed, air T, %RH, water T, incoming solar energy, barometric pressure, and sub-millimeter resolution changes in water level. Comparisons were also made of temperature, %RH, and wind speed at 3 m versus 1 m above the water surface. With these data alternative evaporation models were compared and an improved mass transfer approach tested.
 
Day: Wednesday, Feb. 3
Time:
Location: Sweeney Center
 
Code: CS68WE1031S