Section8Slides_v0 - Basic defnitions: Evapotranspiration :...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Basic defnitions: Evapotranspiration : all processes by which water in liquid phase at or near the earths surFace becomes atmospheric water vapor Evaporation usually describes direct vaporization oF water From open water surFaces and bare soil Transpiration is evaporation From within leaves oF vegetation Together these uxes reFerred to as evapotranspiration ( ET ) Notes: Estimating ET is important because (e.g.) : 1) long-term water balance (need P and E estimates) determines available water; 2) most Food supply grown using irrigated agriculture (eFfcient irrigation requires knowledge oF transpiration by crops); 3) ET rate during interstorm periods controls soil moisture evolution (impacts subsequent ooding); 4) ET couples the surFace water an energy budgets Direct measurement oF actual evapotranspiration is much more diFfcult (and expensive) than precip. or streamow Closest readily available (easy) measurement network are evaporation pans (only measure open water [potential] evaporation)...
View Full Document

Page1 / 6

Section8Slides_v0 - Basic defnitions: Evapotranspiration :...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online