Lec10TranspirationAndWaterStress

Transpiration measuring et0 penman equation

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Unformatted text preview: asure the difference to see the water loss. Transpiration Measuring ET0 • Penman equation – California Irrigation Management and Information System (CIMIS) • CIMIS method – Net radiation – Vapor pressure (relative humidity) – Wind speed – Air temperature in this measurement, this method uses net radiaiton, VP, etc. Transpiration Measuring ET0 • Penman equation – California Irrigation Management and Information System (CIMIS) http://wwwcimis.water.ca.gov/cimis/cimiSat StationLocation.jsp higher solar radiaiton= higher water loss. • CIMIS method – Net radiation – Vapor pressure (relative humidity) – Wind speed – Air temperature Transpiration this atmometer gives u the level of water, and as water evaporates from the top the level will go down and will tell you how much water is lost and used. Measuring ET0 • Atmometer – A scientific instrument used for measuring the rate of evaporation from a wet surface to the atmosphere Transpiration ET-based Irrigation Scheduling • ETCrop – • http://www2.bren.ucsb.edu/~keller/ http://www.essl.ucar.edu/LAR/ http://seeds.thompson-morgan.com/ Transpiration we can...
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