SLIDE 1
Mapping Evapotranspiration
Tony Morse October 9, 2009
Mapping Evapotranspiration Tony Morse October 9, 2009 What is - - PowerPoint PPT Presentation
Mapping Evapotranspiration Tony Morse October 9, 2009 What is - - PowerPoint PPT Presentation
Mapping Evapotranspiration Tony Morse October 9, 2009 What is Evapotranspiration? (Call it ET) Water that goes from liquid to vapor Water evaporated usually from soil Water transpired by growing vegetation Energy Balance for ET
SLIDE 2
SLIDE 3
Energy Balance for ET
ET = R - G - H
G H ET
ET is calculated as a “residual” of the energy balance Basic Principle: Evaporation consumes Energy
Rn
n
SLIDE 4
Why is Mapping ET Important?
There is not enough water Increasing stress on water supplies
Increasing population Changing climate
We can’t manage what we can’t measure
How much water is used Where it is used
SLIDE 5
Competition for Water
SLIDE 6
How to Map ET
Landsat Data and the METRIC model
SLIDE 7
Landsat Data
SLIDE 8
Idaho Applications of ET
Water Planning Aquifer Depletion Hydrologic Modeling Endangered Species Legal Finding-of-Fact Agricultural Water Use Water Rights Buy-Back Water Rights Compliance Water Rights Administration In-Season Demand for Water Tribal Water Rights Negotiations
SLIDE 9