TWRI 3-A5.--ERRATA
page 3, right column, 6 lines up: change ha equal to or less than 1.5 hb to hb equal to or less than 1.5 ha.
page 5, left column, paragraph 1: a) first sentence should read. "Side contractions reduce the effective length of the weir crest and the effective approach velocity"; b) fourth sentence should read "if the abutment corners are rounded, with radius r and r/b > 0.12, the correction factor is approximated as (1 + kc)/2 (obtain kc from figure 3).
page 6, figure 2: Underline the words "full width" in the caption.
page 6, figure 3: a) the lowest curve on figure 3 should be labeled "b/B = 0.2 for square edges. b) sketch in a new curve, to be labeled "b/B < 0.2 for rounded abutments" and plot with the following coordinate points:
c) Add to title of figure 3, ".. with square abutment corners."
d) Add marginal note: "For rounded abutments, if r/b > 0.12, compute coefficient to be (1 + kc)/2, where kc is from figure 3."
page 9, left column, line 3: Change "equation 2" to "equation 3."
page 10, left column, third sentence: If the abutment corners are square, the correction factor is approximated as (1 + kc)/2 (obtain kc from figure 3).
page 19, right column, line 2: Replace sentence with following explanation: "E is the maximum value of y corresponding to the computed values of hs/P. For the computed value of hs/P, determine the maximum value of y/hs and multiply it by hs to obtain E (see figure 9, page 13, for definition of symbols)."
page 22, figure 15: Vertical axis should be labeled: Q/bho3/2.
page 23, left column, paragraph 1, last sentence: Change to, "For all b/B ratios less than 1.0, C must be corrected by kc from figure 3 for square abutment corners, and by (1 + kc)/2 for round corners."
page 23, figure 16: Label the present curve, "h0/P = 0." Draw a new curve as a straight line between h/h0 = 0, C/C0 = 0.65 and h/h0 = 1.0, C/C0 = 1.00; label this curve "h0/P = 2." For other h0/P values, the ordinates for h/h0 = 0 will approximate:
page 23, right column, line 8: Change "equation 1" to "equation 2."
page 23, right column, line 15 down: Change "H/H0" to "H/Hi".
page 24, figure 19: change x axis label to "H/Hi".
page 25, left column, third sentence: It is further assumed that the correction factor is (1 + kc)/2 if the abutment corners are rounded, and r/b is > 0.12.
page 26, immediately preceding subtitle, "Length of flow section", add sentence: "The total head, H, should reflect the average head for nonhorizontal (variable depth) flow sections.
page 26, right column, under "Discharge coefficients", last sentence, first paragraph: Change "...function of the head, h, and the roughness of..." to "..function of the head, H. In both cases the coefficient is also a function of the roughness of..."