Reflectance and temperature characteristics of semiarid rangeland surfaces
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azu_td_hy_e9791_1984_156_sip1_w.pdf
Author
Turner, Georgia Reavis.Issue Date
1984LCSH Subjects
Hydrology.Rangelands.
Soils -- Arizona -- Cochise County -- Optical properties.
Soils -- Thermal properties -- Arizona -- Walnut Gulch Region.
Committee Chair
Post, Donald F.
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The University of Arizona.Rights
Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.Abstract
Spectral and surface temperature measurements were made of various rangeland surface conditions using a hand-held radiometer and an infrared thermometer. Three different soil series, each with three plots with varying surface conditions were studied. T-tests, simple-linear regression analysis, and principal components analysis were used to relate rangeland surface features to spectral and thermal measurements. Vegetation was the feature that had the most effect on surface temperature under dry conditions, and vegetated plots had a lower percent change in daily temperature than bare plots. Under wet conditions, there were no significant differences in temperature between plots with differing surface conditions. Correlation coefficients showed that the hue of the soil was highly correlated with the percent reflectance in all four spectral bands, and the green grass cover decreased the reflectance in bands one, two and three. There were high correlation levels among the spectral bands showing an overlap of spectral information.Type
Thesis-Reproduction (electronic)text
Degree Name
M.S.Degree Level
mastersDegree Program
Soils, Water and EngineeringGraduate College