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Palaeovelocity: A parsimonious proposal
Author(s) -
Church Michael,
Wolcott John,
Maizels Judith
Publication year - 1990
Publication title -
earth surface processes and landforms
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.294
H-Index - 127
eISSN - 1096-9837
pISSN - 0197-9337
DOI - 10.1002/esp.3290150511
Subject(s) - range (aeronautics) , variety (cybernetics) , flow (mathematics) , field (mathematics) , function (biology) , mathematics , statistics , flow resistance , hydrology (agriculture) , computer science , geology , econometrics , environmental science , geotechnical engineering , geometry , pure mathematics , engineering , aerospace engineering , evolutionary biology , biology
Using data collected in her field studies, Maizels (1983) compared five methods of calculating palaeovelocity from coarse gravel deposits. Her paper indicated that the five methods provide estimates which differ by up to 2 x. There are several errors in the published equations, however. Upon correction, the smallest estimate is within 3% per cent of the largest. Other published data sets suggest that the distinction among a variety of palaeovelocity equations is not worth pursuing in light of the amount of scatter in typical data. This paper recommends use of the Thompson and Campbell (1979) modification of the basic Keulegan flow resistance equation because it fits the data as well as any other, whilst covering a more comprehensive range of flow conditions. Problems of appropriate roughness length and entrainmnet function remain.