CGRG Bibliography of Canadian Geomorphology
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Author : Gawron, E.
Date : 1973
Title : The effect of collecting time and grain size on the sampling of stream sediments for geochemical mapping in the St. Catharines area, Ontario
Publication : Brock University, Dept. Of Geological Sciences, St. Catharines, Ontario; Research Report Series, No 6, Studies in Landscape Geochemistry
Issue : 3:
Page(s) : 45 p
Abstract
Factors that influence the variation of chemical data were studied in the twelve mile creek drainage basin of St.Catharines, Ontario. Time of sampling in an industrial and urbanized area is of more importance than in the rural areas. Samples should be collected at specific intervals of time to obtain representative data. During the course of this study, man's influence on the rural scene is at a minimum in the fall and the time of collection did not matter as much as it did in the industrial and urbanized area. To obtain comparable data in a time study or a site study, the sample material should be as similar as possible. For example, a clay sediment contains a higher concentration of trace elements than a sand sediment from the same site. In a time study, the variation of data due to the change in sediment material could be greater than the variation due to time depending on the location. Site inhomogeneity does not affect the variance of chemical data.
Bibliography of Canadian Geomorphology