Experimental study of eddy diffusion coefficients, evapotranspiration and water use efficiency

Millington, R.J.; Peters, D.B.

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https://hdl.handle.net/2142/89953 Copy

Description

Title

Experimental study of eddy diffusion coefficients, evapotranspiration and water use efficiency

Author(s)

• Millington, R.J.
• Peters, D.B.

Contributor(s)

• Aston, A.R.
• Reicosky, D.C.
• Ghorashy, S.R.
• Marcellos, H.
• Katre, R.K.
• United States Agricultural Research Service

Issue Date

1971-12

Keyword(s)

• Water resource development
• Water resource development--Illinois
• Agriculture
• Energy balances
• Evapotranspiration
• Mass transfer coefficients
• Photosynthesis

Geographic Coverage

Illinois (state)

Abstract

Measurements of mass transfer coefficients were made directly by the use of point and line sources. The gas used was propane. The studies revealed that the form of the profile of mass transfer coefficients was markedly dependent on crop geometry, with a local maximum and minimum within the crop canopy. Further studies demonstrated the anisotropy of mass transfer coefficients above the crop canopy wherein the downwind component was greater than the crosswind component. Crosswind and vertical components were nearly equal. Studies were also made on energy balances within crops and with individual plant leaves.

Publisher

University of Illinois at Urbana-Champaign. Water Resources Center

Type of Resource

text

Language

en

Permalink

http://hdl.handle.net/2142/89953

Sponsor(s)/Grant Number(s)

• U.S. Geological Survey
• U.S. Department of the Interior

Copyright and License Information

Copyright 1971 held by R.J. Millington, D.B. Peters

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