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Equilibrium is a solitary word that embraces many concepts. The largely qualitative use of equilibrium within geomorphology has fostered imprecision and even fully error; as a result the term, for many, has actually degenerated to the standing of a non-corrigible regulative principle. Return a few geomorphologists make an accurate use that equilibria terminology, their precision is invariably shed on the larger audience. Equilibrium is linked with pressure in dynamics, with power in thermodynamics (and probability by extension), and with pure numerical behavior in mathematics. In basic System Theory, equilibrium is derived from thermodynamics but applied, through analogy, almost exclusively come mass. In addition, a completely geomorphic variation of equilibrium (dynamic equilibrium) stems from the work of G. K. Gilbert (1876; 1877) and also is based upon sediment flux in ~ the container scale. Unfortunately, Gilbert\"s concept/term has actually been distorted by some geomorphologists in their attempt to develop linkage between equilibria concepts, especially between those relating to energy and also mass. This document reviews and reconsiders the assorted equilibria concepts. An updated variation of Gilbert\"s dynamic equilibrium based upon sediment carry proposed by Ahnert (n.d.), and also termed by us \"mass flux equilibrium,\" holds promise. In addition, the purely mathematical ide of equilibrium outlined through Howard (1988) has substantial utility, listed union with geomorphological theory is achieved. Offered the difficulty of measure up thermal power in the field, that inefficient usage in nature, and also the hesitation with which the and kind can it is in related, thermodynamic equilibria ideas would appear, presently, to offer geomorphologists only very limited opportunities.
The Annals the the American association of Geographers is one of the world foremost geography journals.It has actually been published because 1911 and currently has actually an impact Factor that 2.799, ranking 8th out of 79 location journals worldwide.The Annals has original, timely, and also innovative posts that breakthrough knowledge in every facets of the discipline.Articles are separated into four significant areas: geographic Methods; person Geography; Nature and also Society; and Physical Geography, Earth and Environmental Sciences. There space Editors responsible because that each this themes.The Annals is released six times a year (January, March, May, July, September and November). One problem per year is a devoted Special worry drawing a diversity of files from across the self-control under a single theme.Following tradition, the annual Presidential attend to is published in Annals; Memorials for previous AAG Presidents and also exceptionally distinguished geographers are likewise published.
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