body of water passing over it. The area of the 90 notch is
half that of a circumscribing rectangular notch, so that the
discharge of a V notch is approximately equal to that of a
rectangular notch having a width equal to half the width of the
V notch at water level, and as the total width is equal to
double the depth of water passing over the notch the half width
is equal to the full depth and the discharge is equal to that
of a rectangular notch having a width equal to the depth of
water flowing over the V notch from time to time, both being
measured in the same unit, therefore
____ ____ ____
C \/ H^3 becomes C x H x \/ H^3 which equals C \/ H^5.

The constant C will, however, vary from that for the
rectangular notch to give an accurate result.


TABLE No. 6.

TRIANGULAR OR V NOTCHES.
____
Discharge = C x \/ H^5.

Values of C.

--------------+-----------------------+------------------------
H Measured in | Feet. | Inches.
--------------+----------+------------+-----------+------------
Discharge in | Gallons | C. ft per | Gallons | C. ft per
| per hour | min | per hour. | min