Environmental Requirements of Lysimetersby Richard G. Allen, Utah State Univ, Logan, United States,
William O. Pruitt, Utah State Univ, Logan, United States,
Marvin E. Jensen, Utah State Univ, Logan, United States,
Document Type: Proceeding Paper
Part of: Lysimeters for Evapotranspiration and Environmental Measurements
Some of the more common environmental problems affecting measurement of evapotranspiration (Et) with lysimeters are discussed, including deviation of measurements from one-dimensional Et characteristics of agricultural environments. Problems discussed include evaporative and vegetative areas of lysimeters used in Et computations, effects of thickness and height of the lysimeter rim, one-dimensionality of vegetation inside and outside the lysimeter, clothesline and oasis effects, and effect of moisture regime of the lysimeter on Et measurements. Many of the effects are interrelated, and lysimeters can be plagued by several of these factors simultaneously.
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