Moisture Measurements in Glacial Soils from Airphotos
Winkler EM. 1966. Moisture Measurements in Glacial Soils from Airphotos. Ecology. 47(1):156-158
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.
- Type
- Journal Article
- Authors
- Winkler, Erhard
- Units
- SODN
- Keywords
- Aerial Photography, soil studies, water content