Areal versus linear evaluation of relationship between drainage basin lithology and geochemistry of stream and overbank sediments in low-order mountainous drainage basins |
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| Authors: | Zoran Peh Slobodan Miko Marta Mileusnic |
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| Institution: | (1) Institute of Geology, Sachsova 2, P.O. Box 268, 10000 Zagreb, Croatia;(2) Faculty of Mining, Geology and Petroleum Engineering, University of Zagreb, Pierottijeva 6, 10000 Zagreb, Croatia |
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| Abstract: | The comparison of two multiple regression models is based on the assumption that geochemical composition of the drainage basin
alluvial sediments is derived primarily from the underlying bedrock lithology. The parent material is integrated with both
stream sediment and overbank sediment geochemistry via the two essentially different approaches as regards the drainage basin
geomorphological data: (1) as the relative area of influence representing a portion of the catchment basin occupied by a specific
rock type and (2) as the relative “line” of influence representing a narrow zone of the underlying bedrock traversed by the
perennial streams which form the active stream network. The model comparison is established on the goodness-of-fit test for
both experimental designs and for the same set of data. Both experiments converge on the linear approach as the more appropriate
model in evaluating the lithologic influence on the analysed sample media in small mountainous watersheds. |
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| Keywords: | Drainage basin processes Alluvial sediments Multiple regression analysis Zumberak Croatia |
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