Entry of flow measurement data
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ENTRY OF FLOW MEASUREMENT DATA PowerPoint PPT Presentation


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ENTRY OF FLOW MEASUREMENT DATA. FLOW & ASSOCIATED LEVEL MEASUREMENT STAGE-DISCHARGE RELATIOSHIP DISCHARGE BY VELOCITY-AREA METHOD FLOATS SLOPE-AREA METHOD PRIMARY MODULE (SWDES) PROVIDES DATA ENTRY FORMS DEDICATED TO SUCH REQUIREMENT DETAILED FLOW MEASUREMENTS SUMMARY STAGE-DISCHARGE

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ENTRY OF FLOW MEASUREMENT DATA

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ENTRY OF FLOW MEASUREMENT DATA

  • FLOW & ASSOCIATED LEVEL MEASUREMENT

    • STAGE-DISCHARGE RELATIOSHIP

    • DISCHARGE BY VELOCITY-AREA METHOD

      • FLOATS

      • SLOPE-AREA METHOD

    • PRIMARY MODULE (SWDES) PROVIDES DATA ENTRY FORMS DEDICATED TO SUCH REQUIREMENT

      • DETAILED FLOW MEASUREMENTS

      • SUMMARY STAGE-DISCHARGE

        • HISTORICAL OBSERVATIONS

  • CROSS-SECTION PROFILE DATA

OHS - 1


OHS - 2


OHS - 3


OHS - 4


OHS - 5


1.2 m/s

1.0 m/s

0.8 m/s

0.6 m/s

VELOCITY DISTRIBUTION IN RIVER CROSS SECTION

OHS - 6


b19

b18

b17

b8

b7

b6

b5

b4

b3

b2

b1

D4, V4

FLOW MEASUREMENT - AREA VELOCITY METHOD

OHS - 7


b19

b18

b17

b8

b7

b6

SECTIONS

b5

b4

b3

b2

b1

SEGMENT

FLOW MEASUREMENT - AREA VELOCITY METHOD


COMPARTMENT 1

COMPARTMENT 2

FLOW MEASUREMENT - AREA VELOCITY METHOD


OHS - 8


OHS - 9


DATA ENTRY FORMS

  • DEDICATED DATA ENTRY FORMS

    • GENERAL & GAUGE INFORMATION

    • CURRENT METERING OBSERVATIONS

    • FLOAT OBSERVATIONS

    • SLOPE OBSERVATIONS

    • SUMMARY STAGE-DISCHARGE DATA

OHS - 10


OHS - 11


OHS - 12


OHS - 13


OHS - 14


Water depth


Airline Correction

Wetline Correction


Reading = 3. 5 m

Airline depth


Reset counter

Reading = 0. 0 m


Reading = 4. 2 m

Water depth


Observed depth =4.35 m

=4.2+0.15 m

Total correction = 0.15m

Reading = 3.5 m

Reset the counter

Reading = 0.0 m


OHS - 14


OHS - 15


OBLIQUE FLOW

OHS - 21


OHS - 22


OHS - 23


MEAN VELOCITY PROFILE

OHS - 24


SEGMENTAL FLOWS

OHS - 25


OHS - 26


FLOAT OBSERVATIONS

OHS - 27


FLOW ESTIMATE BY SLOPE-AREA METHOD

  • HIGH STAGES WHEN VELOCITIES ARE DIFFICULT TO MEASURE

    • ESTIMATE CAN BE BASED ON SLOPE-AREA METHOD

      • SLOPE OF WATER SURFACE PROFILE IS OBSERVED

      • MANNING’S EQUATION USED TO GET DISCHARGES

OHS - 28


OHS - 29


OHS - 30


OHS - 31


OHS - 32


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