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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 .
Original Shields diagram, 1936 The Shields diagram empirically shows how the dimensionless critical shear stress (i.e. the dimensionless shear stress required for the initiation of motion) is a function of a particular form of the particle Reynolds number , R e p {\displaystyle \mathrm {Re} _{p}} or Reynolds number related to the particle.
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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.
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
The main feature of thermodynamic diagrams is the equivalence between the area in the diagram and energy. When air changes pressure and temperature during a process and prescribes a closed curve within the diagram the area enclosed by this curve is proportional to the energy which has been gained or released by the air.
For example, when one point is plotted for r, it is a fixed point, and when m points are plotted for r, it corresponds to an m-periodic orbit. When an orbital diagram is drawn for the logistic map, it is possible to see how the branch representing the stable periodic orbit splits, which represents a cascade of period-doubling bifurcations.
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 ...