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Scientific Investigations Report 2013–5014


Evapotranspiration from Wetland and Open-Water Sites at Upper Klamath Lake, Oregon, 2008–2010


Table 7. Comparison of environmental variables affecting evapotranspiration from April 1 to June 30, 2009 and 2010, at both wetland sites. 


[All values shown are period means, except rainfall, which is period total; Ratio, ratio of 2010 value to 2009 value; Diff., 2009 value minus 2010 value. Abbreviations: kPa, kilopascals; mm, millimeter; W m –2 , watts per square meter; °C, degrees Celsius]


Site Solar 

radiation
(W m–2)
  Vapor
pressure
deficit
(kPa)
  Air
temperature
(°C)
  Rainfall
(mm)
2009 2010 Ratio 2009 2010 Ratio 2009 2010 Diff. 2009 2010 Ratio
Bulrush 289 274 0.95   0.624 0.517 0.83   10.81 8.17 2.64   249 168 0.68
Mixed 284 263 0.93 0.621 0.500 0.81 10.67 8.10 2.57 289 196 0.68

First posted March 4, 2013

For additional information contact:
Director, Oregon Water Science Center
U.S. Geological Survey
2130 SW 5th Avenue
Portland, Oregon 97201
http://or.water.usgs.gov

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