On the Generalized Discharge Formula for All Kinds of Rectangular Weirs

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  • 四角せきの総合流量公式
  • ヨンカクセキ ノ ソウゴウ リュウリョウ コウシキ

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Abstract

The author presents here a generalized discharge formula which can be applied to all kinds of the rectangular weirs. This formula has no restriction as to the width b and the value b/B, h/(h+D), and m=h/b (B : channel width, D : depth of weir, h : head). Consequently to weirs with any geometrical shape, i.e., for all weirs of b/B=0∼1, h/(h+D)=0∼1, m=h/b=0∼∞, and further to weirs having any dimension, this formula can give the coefficients of discharge respectively. Estimated discharge coefficients as well as experimental data of weirs for b=0.10, 0.05, 0.025m and for various values of B and D result in this genera1ized discharge formula. Excepting special cases of free overfall, small suppressed weir and full depth weir for b/B≒1, this formula gives discharge coefficients within ±1% error.

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