DRAINAGE DESIGN THEORY AND PRACTICE

SEVERAL DRAINAGE EQUATIONS WERE CHOSEN TO COMPARE THEM WITH THE PERFORMANCE OF AN EXISTING DRAINAGE SCHEME. A REVIEW OF THE DRAINAGE THEORIES CHOSEN IS REPORTED. THE AUGER-HOLE METHOD WAS USED TO DETERMINE THE AVERAGE HYDRAULIC CONDUCTIVITY USED IN THE CALCULATION; AND THE VARIABLE DRAINAGE POROSITY WAS DETERMINED USING TAYLOR'S METHOD. THE DRAIN DISCHARGE AND THE SHAPE OF THE WATER TABLE WERE DETERMINED BY MEANS OF A FLOWMETER, AND LINES OF POLYVINYL CHLORIDE PIEZOMETERS, RESPECTIVELY. TWO RAINFREE PERIODS WERE SELECTED FOR THE EXPERIMENT. THE WATER TABLE PROFILE TENDS TO INDICATE AN ESSENTIALLY FLAT WATER SURFACE. ALL THE EQUATIONS TESTED, EXCEPT LUTHIN'S, GAVE AN AVERAGE CALCULATED SPACING WHICH IS LARGER THAN THE ACTUAL SPACING. IT IS CONCLUDED THAT THE UPWELL SITE COULD PERFORM AS WELL AS IT IS DOING NOW WITH A WIDER SPACING. MORE RESEARCH IS RECOMMENDED BEFORE ONE OR TWO EQUATIONS COULD BE CHOSEN TO AID THE DESIGN OF DRAINAGE SCHEMES. /JH/

  • Supplemental Notes:
    • Vol 9, No 3, PP 259-276, 10 FIG, 2 TAB, 15 REF
  • Authors:
    • Nwa, E U
    • Twocock, J G
  • Publication Date: 1969-11

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Filing Info

  • Accession Number: 00235635
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Apr 20 1970 12:00AM