manning equation for discharge & rating puna-1

7/25/2019 Manning Equation for Discharge & Rating Puna-1

1/30

Discharge measurement

Parameters Computed Discharges

Water Level (m) 326.8 327 328 32

T !op "idth (m) 2#.7 36 7$.3 8%.3%

A %6 76 %&2.33

P Wetted Perimeter (m) 2& 37 7% 82.3&

R ' (draulic 'adius) $.3# $.#3 %.$8 %.8&

S *nerg Line +lope (% in &$) $.$2$ $.$2$ $.$2$ $.$2$

n n ('oughness coe,cient) $.$2& $.$2& $.$2& $.$2&

23 &2 #&& %3$%

-elocit (msec) 3 3 6

*n=0.025 (Ref: Page 14/20 Handbook by PN Khanna

Wetted /rea (m2)

Discharge (m3sec)

$00

1000

1200

1400

f(& = 5#4.%522$!$12!& ' 1$#%5!.%

R = 0.%5"1242""

Discharge vs Water L


2/30

Discharge measurement in 0ront

Parameters

Water Level (m) 8 (/s on $%.$7.%&)

T !op "idth (m) %%$

A 2##

P Wetted Perimeter (m) %%%R ' (draulic 'adius) 2.2%

S *nerg Line +lope (% in 38) $.$26

n n ('oughness coe,cient) $.$&$

%3#6

-elocit (msec) 6

*n=0.050 (Ref: Page 14/20 Handbook by PN Khanna

Wetted /rea (m2)

Discharge (m3sec)


3/30

o0 /dit to '!

Computed Discharges

8& 862

%37 %&6

88% %3%8

%#3 %666.%6 7.#

$.$26 $.$26

$.$&$ $.$&$

67% %7%37

%% %3


4/30

)ae ae- ee )+,ha-ge 3%.7.%3 d3

01.05.12 11%4.50 %0 115 25 21.0#

02.05.12 11%4.4" $$ 110 2!

0!.05.12 11%4.44 $# 10$ 21 R = 0.%$##$"1%

04.05.12 11%4.52 %" 11# 21

05.05.12 11%4."5 114 1!! 1% !1.#

0".05.12 11%4.5" 105 122 1#

0#.05.12 11%4.5# 1"$ 12! 44 R = 0.%%051"!1

0$.05.12 11%4.5$ 111 125 1!

0%.05.12 11%4.#! 122 144 22 201!

10.05.12 11%4.#2 11% 14! 24

11.05.12 11%4.#0 11$ 140 22

12.05.12 11%4.#% 12$ 152 24

1!.05.12 11%5.01 14! 1$5 42

14.05.12 11%5.1" 1#! 20% !5 na

15.05.12 11%5.!% 221 24% 2$

1".05.12 11%5.!2 1%1 2!" 45

1#.05.12 11%5.10 1#1 1%% 2$

1$.05.12 11%5.00 1"0 1$! 2! 1or Calculation

1%.05.12 11%5.24 1%4 222 2$ Date Water Level Discharge

20.05.12 11%5.20 1%1 21" 24 01.0%.12 %%6.8$ 5$!

21.05.12 11%5.02 1"4 1$" 22 02.0%.12 %%7.7 %04

22.05.12 11%5.11 200 201 1 0!.0%.12 %%7.$2 "4$

2!.05.12 11%5.!# 21% 245 2# 04.0%.12 %%7.36 #55

24.05.12 11%5.5# 250 2$! !4 05.0%.12 %%7.2 %51

25.05.12 11%5.52 24! 2#4 !0 0".0%.12 %%7.2# #1"

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2#.05.12 11%5.$$ !1% !4$ 2% 0$.0%.12 %%6.&7 51$

2$.05.12 11%5.5# 25# 2$! 2" 0%.0%.12 %%6.&6 51"

2%.05.12 11%5."# 2#! !0! !0 10.0%.12 %%6.## 4$4

!0.05.12 11%5.$5 2$% !41 5! 11.0%.12 %%6.#8 4%4

!1.05.12 11%5.$# !!0 !4" 1" 12.0%.12 %%6.23 4!0

y = 22.144#!!"$1#&2' 52#"$.%$4"#!51!4

y = 21.5#05021!#!&2' 51!$%.!5#00""22$

!5.0004244%#5&2' $!4%5.44#"520$0

!#.00150"4!2#&2' $$2#%.###%$$51"

!".%!01054104&2' $$10#.$"4#21%2%


5/30

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6/30

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7/30

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8/30

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9/30

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10/30

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11/30

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12/30

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13/30

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14/30

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%%6.2& 4!5

%%6.32 45!

%%6.2& 4!5

%%6.2# 4!!

%%6.2# 4!!

%%6.$ !%#

%%6.$3 !$!

%%6.$6 !%0

%%6.%6 41!

%%7.$ %44

%%8.$$ %$1

%%8.%& 10!%

%%8.%8 1050

%%8.26 10$2

%%7.& %"!


17/30

0

4

6 !14!5$#5.!"$"2"$000

6 !0"0#2!5.!054!!5000

& 6 4%#%5#"!.2$24$52000

& 6 52"55442."1$$2"1000

& 6 52551%"$.2#%$1$#000

!00

400

500

"00

#00

$00

%00

1000

1100

1200

1!00

1400

1500

1"00

f(& = !".%!0105410"&72 ' $$10#.$"4#22!52!& 6 52551%"$.2$00#1#

R = 0.%$$0"$4415

Discharge (cumecs)


18/30

11%4.00 11%4.50 11%5.00 11%5.50 11%".00 11%".50 11%#.00 11%#.50 11%$.00 11%$.50 11%%.00 1

0

100

200

Water Level (m)


19/30


20/30


21/30


22/30


23/30


24/30


25/30


26/30


27/30


28/30


29/30


30/30

1%%5$$# e++

10 1%%5$% 1#%"2%$

45 $%$14%

!0 5%$#""

10 1%%5$%

5 %%#%4100 1%%5$$#

manning equation for discharge & rating puna-1

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