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The utility of surface temperature measurements for the remote sensing of surface soil water statusExperiments carried out on an Avondale loam soil indicated that the thermal inertia concept of soil water content detection is reasonably sound. The volumetric water contents of surface soil layers between 2 and 4 cm thick were found to be linear functions of the amplitude of the diurnal surface soil temperature wave for clear day-night periods. They were also found to be linear functions of the daily maximum value of the surface soil-air-temperature differential. Tests on three additional soils ranging from sandy loam to clay indicated that the relations determined for Avondale loam could not be accurately applied to these other soil types. When the moisture characteristic curves of each soil were used to transform water contents into pressure potentials, however, it was found that soil water pressure potential could be determined without prior knowledge of soil type, and thus its value as a potential soil water status survey tool was significantly enhanced.
Document ID
19750054267
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Idso, S. B.
Jackson, R. D.
Reginato, R. J.
(U.S. Department of Agriculture, Water Conservation Laboratory, Phoenix Ariz., United States)
Schmugge, T. J.
(NASA Goddard Space Flight Center Greenbelt, Md., United States)
Date Acquired
August 8, 2013
Publication Date
July 20, 1975
Publication Information
Publication: Journal of Geophysical Research
Volume: 80
Subject Category
Earth Resources And Remote Sensing
Accession Number
75A38339
Distribution Limits
Public
Copyright
Other

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