1986-10-07_PERMIT FILE - C1981008A

• Permit No: C1981008A
• IBM Index Class Name: PERMIT FILE
• Doc Date: 10/7/1986
• Doc Name: Dodson & Associates Hydraulic Programs TRAP PIPE
• Section_Exhibit Name: Tab 13 Attachment J
• Media Type: D
• Archive: Yes

SECTION 2: TRAPEZOIDAL AND CIRCULAR CHANNEL ANALYSIS PROGRAMS
2 TRAPEZOIDAL AND CIRCULAR CHANNEL ANALYSIS
2.1 DESCRIPTION OF TRAPEZOIDAL CHANNEL
A trapezoidal channel has flat bottom and sloping sides. Trapezoidal shapes
are often used for man-made channels, because they are relatively easy to
construct and maintain, and provide good flow capacity.
TOP WIDTH
_a �I
FLOW AREA
o Z = Side Slope
r BOTTOM WIDTH
2.2 DESCRIPTION OF CIRCULAR CHANNEL
A Circular Channel is a segment of a round pipe or a semi-circular flume which
is flowing part-full of water:
DIAMETER
TOP WIDTH
a. FLOW AREA
a
w
o
DODSON & ASSOCIATES, INC. THE DODSON HYDRAULICS LIBRARY, PAGE 13