Morphometric studies were conducted on the "loess mantled" and "loess depositional" topographies of the Wisconsin Age loess of western Iowa. Slope angle and absolute drainage density decrease with increasing distance from the Missouri River as a power function. The rate of decrease of both parameters is great for the first 8 miles from the river and less for the next 24 miles. Although the change between the two types of topography is gradual, it is suggested that the transition from rapid to more gentle decrease of slope angle or drainage density with distance from the river be used as a quantitative criterion for the boundary between the two topographies. Relationships exist between loess thickness and absolute drainage density and slope angle which permit estimation of loess thickness from a measurement of these topographic parameters. It is suggested that measurements of this type will provide a remote sensing technique for the quantitative evaluation of other loess properties.
Proceedings of the Iowa Academy of Science
© Copyright 1967 by the Iowa Academy of Science, Inc.
Lohnes, R. A. and Joshi, R. C.
"Quantitative Variations in Loess Topography,"
Proceedings of the Iowa Academy of Science: Vol. 74:
, Article 26.
Available at: https://scholarworks.uni.edu/pias/vol74/iss1/26