Precipitation statistics for geomorphologists: variations on a theme by Frank Ahnert

Functional geomorphology. Landform analysis and models

Auteurs :
COX, N.J.
SCHMIDT, k.h.

Description :
A method proposed by Ahnert for magnitude-frequency analysis amounts to fitting an exponential distribution: the parameters can be specified directly as the sample mean and the known minimum value. When applied to precipitation data, the most obvious comparison is with the more general gamma distribution: although fitting is technically more awkward, methods publicised here allow estimation of parameters by maximum likelihood and computations for probably plots. The exponential my be a good approximation to the upper tail of a gamma distribution. The gamma distribution reduces difficulties with outliers and curvature.


Type de document :
Article de monographie

Source :
Catena. Supplement (Giessen), issn : 0722-0723, 1992, n°. 23, p. 189-212, Collation : Illustration, Références bibliographiques : 55 réf.

Date :
1992

Editeur :
Pays édition : Allemagne, Cremlingen, Catena-Verlag Rohdenburg