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The Hjulström curve, named after Filip Hjulström (1902–1982), is a graph used by hydrologists and geologists to determine whether a river will erode, transport, or deposit sediment. It was originally published in his doctoral thesis "Studies of the morphological activity of rivers as illustrated by the river Fyris .
Henning Filip Hjulström (6 October 1902 – 26 March 1982) was a Swedish geographer.Hjulström was professor of geography at Uppsala University from 1944, and in 1949, when the subject of geography was split, he became professor of Physical Geography.
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The logarithmic Hjulström curve. In 1935, Filip Hjulström created the Hjulström curve, a graph which shows the relationship between the size of sediment and the velocity required to erode (lift it), transport it, or deposit it. [23] The graph is logarithmic.
Geology portal; This article is within the scope of WikiProject Geology, an attempt at creating a standardized, informative, comprehensive and easy-to-use geology resource. . If you would like to participate, you can choose to edit this article, or visit the project page for more informati
Particle size distribution curves of soil; Map of the Solar System and the distance to Proxima Centauri, using a logarithmic scale and measured in astronomical units. The following are examples of commonly used logarithmic scales, where a larger quantity results in a lower (or negative) value: pH for acidity; Stellar magnitude scale for ...
The superformula is a generalization of the superellipse and was proposed by Johan Gielis in 2003. [1] Gielis suggested that the formula can be used to describe many complex shapes and curves that are found in nature.
In engineering, the Moody chart or Moody diagram (also Stanton diagram) is a graph in non-dimensional form that relates the Darcy–Weisbach friction factor f D, Reynolds number Re, and surface roughness for fully developed flow in a circular pipe.