CGRG Bibliography of Canadian Geomorphology
Search Results
Author : Buffin-Belanger, T.; Reid, I.; Rice, S.; Chandler, J.H.; and Lancaster, J.
Date : 2002.
Title : Casting coarse-grained sedimentary surfaces for the study of near-bed hydraulics.
Publication : Special CGRG Session. Annual Meeting of the Canadian Association of Geographers – Ontario Division. University of Western Ontario, London, Ontario. October 25-26, 2002.
Issue :
Page(s) :
Abstract
In the field, the measurement of near-bed hydraulics remains problematic. Greater precision is possible in the laboratory, but, in the case of gravels , it is difficult to create a water-worked channel-bed that is realistic enough to replicate faithfully the conditions found in nature. In this paper, we describe a technique to reproduce coarse-grained sedimentary fabrics of considerable areal extent. The technique involves moulding natural river-bed surfaces from which facsimiles are cast. Astonishingly realistic casts of 1 by 2 m were produced and their quality assessed using spatial data derived using automated digital photogrammetry. The casts reproduce the true surfaces with errors at millimetre scale (0.5% of the microrelief). The technique allowed us to introduce sedimentary surfaces that incorporate natural, complex structures of grains up to cobble size into experimental channels where detailed studies of nearbed hydraulics can be carried out.
Bibliography of Canadian Geomorphology