A CRITICAL REVIEW OF CONVENTIONAL BED LOAD FORMULAE

CERTAIN OF THE CONVENTIONAL FORMS OF BED LOAD FORMULA ARE EXAMINED USING SIMILITUDE THEORY AS A COMMON BASE OF COMPARISON. THE PARTICULAR FORM OF SIMILITUDE THEORY EMPLOYED IS THE METHOD OF SYNTHESIS PRESENTED RECENTLY FOR SEDIMENT TRANSPORT STUDIES BY BARR AND HERBERTSON. IT IS EMPHASIZED THAT ANY BED LOAD FORMULAE IS AT BEST AN APPROXIMATION DUE THE ARBITRARY NATURE OF THE SUBDIVISION OF TOTAL SEDIMENT LOAD INTO WASH, SUSPENDED AND BED LOAD FRACTIONS. THE PARTICULAR FORMULAE CHOSEN FOR EXAMINATION ARE CONSIDERED TO BE REPRESENATIVE OF BED LOAD FORMULAE IN GENERAL. IT IS SHOWN THAT THE FORMULAE ARE BASED ON ALTERNATIVE FORMS OF GENERAL SIMILITUDE SEDIMENT TRANSPORT EQUATIONS AND CONSIST OF INCOMPLETE VERSIONS OF THESE EQUATIONS. MOST COMMONLY OMITTED ARE TERMS SUCH AS THE RATIO OF SEDIMENT TO FLUID DENSITY AND THE RATIO OF A LINEAR CHANNEL DIMENSION, SAY FLOW DEPTH, TO SEDIMENT GRAIN SIZE. THIS EFFECTIVELY LIMITS THE APPLICABILITY OF THE FORMULAE TO VERY NARROW BANDS, WITHOUT WHICH THERE CAN BE LITTLE JUSTIFICATION FOR COMPARISON OF RESULTS OBTAINED BY USE OF THE FORMULAE. /AUTHOR/

  • Supplemental Notes:
    • Vol 8, No 1, PP 1-26, 6 FIG, 3 TAB, 29 REF, 1 APP
  • Authors:
    • Herbertson, J G
  • Publication Date: 1969-5

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  • Accession Number: 00204234
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Aug 11 1994 12:00AM