Biases of submerged bulk and freeze-core samples

Auteurs :
ZIMMERMANN, A.
COULOMBE-PONTBRIAND, M.
LAPOINTE, M.

Description :
The aims of this paper are to quantify the relative biases of the freeze-core and bulk sampling techniques against more accurate composite samples and to examine whether systematic losses of fines can be predicted. At 6 riffles the spawning substrate was sampled under approximately 50 cm of water with a bulk sample and 3 adjacent freeze-cores. For each riffle, data from the 2 samples were combined using the method of Fripp and Diplas (1993) and the resultant composite sample was compared with the original freeze-core and bulk samples to assess the relative precision and biases of the 2 techniques.


Type de document :
Article de périodique

Source :
Earth surface processes and landforms, issn : 0197-9337, 2005, vol. 30, n°. 11, p. 1405-1417, nombre de pages : 13, Collation : Illustration, Références bibliographiques : 26 ref.

Date :
2005

Editeur :
Pays édition : Royaume-Uni, Chichester, Wiley