PERMFILE136728

• Permit No: C1981013
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Section_Exhibit Name: EXHIBIT 18 SURFACE WATER CONTROL DESIGN DATA
• Media Type: D
• Archive: No

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PROGRAM OUTPUT LISTS ALL THE INPUT PARAMETERS AND THE
CALCULATED PARAMETERS. l•1HICH ARE:
10-YEAR PEAK RAINFALL INTENSITY TO SATURATE,
RUNOFF IN INCHES. 10-YR-24-HR,
RUNOFF IN ACRE-FEET. SO-YR-24-HR,
PEAK FLOW IN CUBIC FEET PER SECOND.
THESE PRINT-OUTS HAVE THE HEADING "RUNOFF" FOR EACH DRAINAGE
BASIN. FOR OPEN CHANNEL FLOW CALCULATIONS. 7HE PROGRAM
CALLS FOR THE FOLLOWING PARAMETERS:
CHANNEL SHAPE. TRAPEZOIDAL,PARABOLIC. 6 CIRCULAR,
DIMENSIONS. DEPTH, TOP. AND BOTTOM. OR, DIAMETER,
SLOPE. FEET DROP PER FOOT RUN.
LENGTH. FEET,
MANNINGS NUMBER, ROUGHNESS COEFFICIENT.
THE PROGRAM THEN CALCULATES THE MAXIMUM FULL FLOW
CHARACTERISTICS OF THE CHANNEL. THIS MAXIMUM FLOW IS NOT
THE DESIGN FLOW. THE DESIGN FLOW IS THE TOTAL RUNOFF THAT
WILL INFLUENCE THE CHANNEL AS CALCULATED PREVIOUSLY. THE
PROGRAM THEN PRIPJTS THE INPUT PARAMETERS AS WELL AS THE
FOLLOWING CALCULATED VALUES:
WETTED PERIMETER. FEET.
HYDRAULIC RADIUS. FEET,
VELOEITY. FEET PER SECOND,
TII9E THROUGH CHANNEL. MINUTES.
THE PROGRAM THEN ASKS FOR ANY NFW DESIGN PARAMETERS. THESE
COULD BE:
DEPTH OF FLOW. FEET,
VELOCITY OF FLOW. FEET PER SECOPID.
FLOW. CUBIC FEET PER SCCOND.
~1ANNINGS NUMBER, ROUGHNESS COEFFICIENT.
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