CONTENTS
SECTION I PROFILING
Mean Velocity ( ) Definition .......................................................................................................... 1-1
Cross-Sectional Area .........................................................................................................................1-1
Site Selection .....................................................................................................................................1-2
Choosing the Method .................................................................................................................. 1-2
Profiling Checks ................................................................................................................................ 1-3
Calculating ..................................................................................................................................... 1-3
0.9 x Vmax Method ..................................................................................................................... 1-3
.2 .4 .8 of Depth Method.............................................................................................................. 1-3
.4 Method..................................................................................................................................... 1-4
2-D Method ................................................................................................................................. 1-4
2-D Method Alternate.................................................................................................................. 1-4
VPT Method ................................................................................................................................ 1-5
Measuring Level ................................................................................................................................ 1-5
Circular Conduits............................................................................................................................... 1-5
SECTION II CALCULATING FLOW
Circular Conduits............................................................................................................................... 2-1
Outline ......................................................................................................................................... 2-1
Calculate the Level/Diameter Ratio (L/D) .................................................................................. 2-1
Identify Flow Unit Multiplier K ..................................................................................................2-1
Square the Diameter .................................................................................................................... 2-2
Calculate the Flow ....................................................................................................................... 2-2
Rectangular Channels ........................................................................................................................ 2-5
Rivers and Streams ............................................................................................................................2-6
Flow Unit Conversion .......................................................................................................................2-7
SECTION III A PROFILING EXAMPLE USING THE MMI MODEL 2000
Collecting Field Data With The Model 2000 The 2-D Method ........................................................ 3-1
Field Data .................................................................................................................................... 3-2
The .2, .4, .8 Method ................................................................................................................... 3-3
The .4 Method ............................................................................................................................. 3-3
The 0.9 x Vmax Method.............................................................................................................. 3-3
The VPT Method ......................................................................................................................... 3-3
Average ..................................................................................................................................... 3-3
% OF DEVIATION........................................................................................................................... 3-4
% of Deviation Between High and Average ............................................................................... 3-4
% of Deviation Between Low and Average ................................................................................3-4
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