“competence”的概念、定义、翻译、参考文献-科学参考

competence

Geology and Earth Sciences

1. The maximum size of rock particle transported by a particular flow of ice, water, or air. Ice has a high competence, because of its viscosity; flowing water has a lower competence, though this increases sharply as velocity increases. Wind has the least competence.
2. The relative rheological (see rheology) properties of different rock types that are adjacent to one another. Typically, a competent rock is more viscous than an incompetent rock, more prone to fracture, and maintains its thickness on deformation. An incompetent rock is usually more ductile than a competent rock and therefore flows more easily.

Geography

The largest size of particle that a river can carry. Competence varies with water depth, but is reduced with channel widening (Cheetham (1979) GSA Bull. 90, 9). The sixth power law suggests that a doubling, for example, of river velocity would raise competence by 2⁶, i.e. by a factor of 64; see Houbrechts et al. (2011, Geomorph. 126). Baker and Ritter (1975) GSA Bull. 86, 7 demonstrate the analysis of shear stress as an estimate of competence.
See also hjulström diagram.

单词	competence
释义	competence Geology and Earth Sciences 1. The maximum size of rock particle transported by a particular flow of ice, water, or air. Ice has a high competence, because of its viscosity; flowing water has a lower competence, though this increases sharply as velocity increases. Wind has the least competence. 2. The relative rheological (see rheology) properties of different rock types that are adjacent to one another. Typically, a competent rock is more viscous than an incompetent rock, more prone to fracture, and maintains its thickness on deformation. An incompetent rock is usually more ductile than a competent rock and therefore flows more easily. Geography The largest size of particle that a river can carry. Competence varies with water depth, but is reduced with channel widening (Cheetham (1979) GSA Bull. 90, 9). The sixth power law suggests that a doubling, for example, of river velocity would raise competence by 2⁶, i.e. by a factor of 64; see Houbrechts et al. (2011, Geomorph. 126). Baker and Ritter (1975) GSA Bull. 86, 7 demonstrate the analysis of shear stress as an estimate of competence. See also hjulström diagram.
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