Comparison of simulated and actual evaporation from maize and soil in a lysimeter

Paul E. Waggoner, Neil C. Turner

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Evaporation from maize and soil in a pair of lysimeters in a maize crop, ventilation and net radiation above the crop canopy, temperature and humidity above and below the canopy, and leaf area and stomatal resistance in six strata of the canopy were observed during 12 one-hour periods. The measured evaporation was mimicked by an algebraic simulator of energy exchange in six canopy strata plus a seventh stratum occupied by bare stems and the soil surface when the observed stomatal resistance or a resistance that varied realistically with radiation was specified. If a constant stomatal resistance was specified, the simulation was inaccurate. Accurate simulation of evaporation from the soil required that diffusivity be decreased more rapidly within the lower canopy than the observed decrease in horizontal wind.

Original languageEnglish
Pages (from-to)113-123
Number of pages11
JournalAgricultural Meteorology
Volume10
Issue numberC
DOIs
Publication statusPublished - 1972
Externally publishedYes

Fingerprint

lysimeter
evaporation
maize
canopy
soil
crop
net radiation
diffusivity
leaf area
ventilation
simulation
simulator
humidity
soil surface
comparison
stem
energy
temperature

Cite this

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abstract = "Evaporation from maize and soil in a pair of lysimeters in a maize crop, ventilation and net radiation above the crop canopy, temperature and humidity above and below the canopy, and leaf area and stomatal resistance in six strata of the canopy were observed during 12 one-hour periods. The measured evaporation was mimicked by an algebraic simulator of energy exchange in six canopy strata plus a seventh stratum occupied by bare stems and the soil surface when the observed stomatal resistance or a resistance that varied realistically with radiation was specified. If a constant stomatal resistance was specified, the simulation was inaccurate. Accurate simulation of evaporation from the soil required that diffusivity be decreased more rapidly within the lower canopy than the observed decrease in horizontal wind.",
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Comparison of simulated and actual evaporation from maize and soil in a lysimeter. / Waggoner, Paul E.; Turner, Neil C.

In: Agricultural Meteorology, Vol. 10, No. C, 1972, p. 113-123.

Research output: Contribution to journalArticle

TY - JOUR

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AU - Turner, Neil C.

PY - 1972

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