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Moisture Measurements in Glacial Soils from Airphotos
Author(s) -
Winkler Erhard M.
Publication year - 1966
Publication title -
ecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.144
H-Index - 294
eISSN - 1939-9170
pISSN - 0012-9658
DOI - 10.2307/1935757
Subject(s) - atterberg limits , soil water , water content , moisture , environmental science , soil science , glacial period , hydrology (agriculture) , geology , geotechnical engineering , geography , geomorphology , meteorology
Photographs with two commercial aerial films of soil samples from glacial drift established a relation between the tone of airphotos and water content of soils. Optical densities of film negatives, measured with a Weston photographic analyzer, decreased proportionally with added moisture nearly to the Atterberg plastic limit of the soil, but then sharply increased as the Atterberg liquid limit was approached. Although these results do not exactly match moisture amounts inferred from densities of actual airphotos, further studies may yield empirical values useful in some areas.