A Study to Explore the Use of Orbital Remote Sensing to Determine Native Arid Plant Distribution
AffiliationOffice of Arid Lands Studies, University of Arizona
College of Earth Sciences, University of Arizona
KeywordsVegetation surveys -- Remote sensing.
Botany -- Arizona -- Remote sensing.
Botany -- Arid regions -- Remote sensing.
Remote sensing -- Arizona.
MetadataShow full item record
Description"Last biannual progress report and final report describing work under NASA contract no. NAS5-21812."
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Multispectral reflectance and image textural signatures of arid alluvial geomorphic surfaces in the Castle Dome Mountains and piedmont, southwestern ArizonaShih, Ernest Hsiao Hsin (The University of Arizona., 1982)
Spectral properties of paddy rice with variable water depthQi, Jiaguo, 1959- (The University of Arizona., 1989)An experiment was conducted to determine whether the water depth (above soil) and soil type would have any influence on the multispectral reflectances of paddy rice, and their calculated vegetation index values. The results showed that, when vegetation cover was low (below 600 grams of dry biomass per square meter), the near infrared (NIR) reflectances decreased very little with water depth. The same was true for red reflectances, but to a lesser degree. Overall the changes were not significant at 0.05 level of significance when the water depth was increased from 2.5 centimeters to 10 centimeters. When the vegetation cover became higher most NIR and red reflectances did not show a significant decrease with the increase of the water depth, and sometimes they even increased slightly up to a water depth of 6.4 cm. Nevertheless both rice cover and water depth as well as soils played an important role in the reflectance pattern in red and NIR bands. Some index values increased and some decreased depending on water depth and rice cover. Statistical analysis of the data showed that rice multispectral responses were mainly controlled by vegetation and minimally influenced by soil and water depths.