147530_perhitungan pengendalian banjir

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    Tabel 1.1. Perhitungan Hujan Wilayah (mm/jam)

    Ranking Tahun Sta. Gembong

    1 198 1!"

    # 198$ !

    ! 1988 1#%

    & 1989 1%!

    " 199% 8%

    't ratarata 1%%.#

    S #9.1$

    Tabel 1.#. Perhitungan Hujan Ren*ana +erbagai Perio,e (R#&) (mm/jam)

    ParameterPerio,e -lang

    # th " th 1% th #" th

    tr %.!$ 1."% #.#" !.#%

    %."% %."% %."% %."%

    S %.9" %.9" %.9" %.9"

    0tr %.1& 1.% 1.8" #.8"

    S #9.1$ #9.1$ #9.1$ #9.1$

    R#& 9.# 1!1.%$ 1"&.1! 18!.#

    Tabel 1.!. Perhitungan nten2ita2 Hujan (mm/menit)

    T (3aktu) nte2ita2 Hujan

    4enit # th " th 1% th #" th

    " "%&."! 8$.%# 8%$.8 9%."!

    1% !1$.8! &!#.8% "%8.9# %".1%1" #."" !!%.#9 !88.!8 &1.$8

    #% #%%.## #$#." !#%.% !81.19

    #" 1$#."" #!&.9 #$.#9 !#8."%

    !% 1"#.8% #%8.%$ #&&. #9%.9%

    !" 1!$.8$ 18$.$" ##%.$$ ##.&9

    &% 1#.1! 1$1.$ #%1.9$ #&%.1!

    &" 11.1 1"8.$9 18.$1 ###.%%

    "% 1%8.$% 1&8.%1 1$&.%" #%.9&

    "" 1%#.%% 1!8.9% 1!.!! 19&.#%

    % 9.# 1!1.%$ 1"&.1! 18!.#1#% %.& 8#."$ 9$.1% 11".&&

    #&% !8.#% "#.%# 1.1$ $#.$!

    !% #9.1" !9.$% &.8 ""."%

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    "% th 1%% th

    !.9% &.%

    %."% %."%

    %.9" %.9"

    !."9 &.!#

    #9.1$ #9.1$

    #%&.8 ##.!1

    "% th 1%% th

    1%$!.$9 118.#!

    $.&" $&$.#8"1.## "$%.#8

    .1! &$%.$"

    !$.#! &%".8

    !#".#% !"9.#"

    #9!.&& !#&.1$

    #8.&" #9."

    #&8.1$ #$&.1

    #!1.!& #""."

    #1$.1% #!9.8!

    #%&.8 ##.!11#9.% 1."$

    81.!% 89.81

    #.%& 8."&

    0 50 100 150 200 2500.00

    100.00

    200.00

    300.00

    400.00

    500.00

    600.00

    INTENSITAS HUJAN PERIODE ULANG

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    300 350 400

    2 TAHUN

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    Tabel #.1. 5ata n6lo3 Wa,uk

    T (jam) % 1 # ! & "

    8 1#& #8& !$& !1& #&

    Tabel #.#. 5ata Tam7ungan Wa,uk

    3 (m) 9%.%% 9%."% 91.%% 91."% 9#.%% 9#."%

    "%%& "1#& "#"& "!$" ""$" "$#"

    Tabel #.!. olume Tam7ungan 0olam

    k (m) #% #%." #1 #1." ## ##."

    %."& #.& 8." 1 #! !%.&

    Gambar #.1. Gra6ik 5aya Tam7ung Wa,uk

    Tabel 5ata :ut6lo3 Wa,uk

    T (jam) % 1 # ! & "

    % !.19 ##.1& 1.&& 11#.1 1&."%

    ; (m!/2)

    3 (1%&m!)

    k (1%&m!)

    ; (m!/2)

    5000 5200 5400 5600 5800 6000 6200 6400 66090.00

    90.50

    91.00

    91.50

    92.00

    92.5093.00

    93.50

    94.00

    94.50

    95.00

    f(x) 0.0035094287x ! 72.5084106549

    "# (x104 ($3%&))

    E# ($)

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    $ 8 9 1% 11 1# Tabel #.1

    19" 1&& 9& % !& #% 1%

    Ste7

    9!.%% 9!."% 9&.%% 9&."% 1

    "8!& "99& %9& #$& 1

    9%.11 #

    #! #!." 9%.&% !

    !$.& &&.&

    9%.$9 &

    91.18 "

    91.&1

    91."# $

    91."! 8

    91.&$ 9

    91.! 1%

    91.#& 11

    91.1# 1#

    91.%% 1!

    $ 8 9 1% 11 1#

    1!.9$ 1!.9$ 1"".9" 1!8.$8 1#%.8# 1%!.$1 8$."% Gambar

    6800 7000

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    Q (

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    .1. Perhitungan

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    0 1 2 3 4 5 6 7 8 9 10 11 12

    0

    50

    100

    150

    200

    250

    300

    IN'L

    OUT'

    Jam

    3/s)

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    :R o =2 S3 3

    (m)

    9 1%>!?9 11>1% 1# 1!

    "%%$ 9%

    1.% %."$ #!.19

    "%!%.19 9%.11

    0.111#. &." 8.88

    "%99.%$ 9%.&%

    0.4&1.$9 1".%& 1%!.&%

    "#%#.& 9%.$9

    0.798.8% !1.#" 9#."9

    "#9".% 91.18

    1.181#9.!! &." "$.&8

    "!"#."& 91.&1

    1.411"".#& "".89 #.$!

    "!$9.#$ 91."#

    1.521!.9$ "9.%! 1.99

    "!81.# 91."!

    1.521"9.9 "$."9 1&.$"

    "!."1 91.&$

    1.471&$.! "!.%" #".!!

    "!&1.18 91.!

    1.361#9.8% &.$! #9.81

    "!11.!8 91.#&

    1.2411#.#$ &%. !%.$%

    "#8%.8 91.1#

    1.129".1 !&. #9.%#

    "#"1. 91.%%

    10eterangan C Debar S7ill3ay > !"m

    E, > #."

    :ut6lo3 ratarata

    olume:ut6lo3

    Tam7unganWa,uk

    Tam7ungan TotalleAa2i 4uka Bir

    Wa,uk

    (m!/2) (1%&m!) (1%&m!) (1%&m!)

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    LO

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    *,

    !" #." 8$.""1

    lebar27ill3ay

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    2aluran 1# ren*ana

    Saluran Titik

    (m)1 &&.%&%&

    1# #1.&&

    # #%.%"

    Setelah ,i7eroleh 7enam7ang untuk 2aluran 1#F maka ,a7at ,i7eroleh

    ;#!

    ,imana C

    b h m i

    (m) (m)

    1!.$ &.1 1 %.%%%9

    leAa2i 5a2arSungai

    PanjangSaluran

    (1%!

    m)

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    Blur Sungai Titik leAa2i

    ren*ana ;(m)

    1 &&.%&%&1 # #1.&&

    %.%%11 1!.9$ # #%.%"

    # ! 11.1"

    ! 1%.%&&

    ; 2aluran #! C ! & 1&.%&

    & #.!&

    ! 1%.%&&

    ! " 9&.&

    " 1.&"

    ;ka7 B P R n

    (m#) (m) (m)

    1&9.$! $#.98 #".!% #.88 %.%!

    Panjang BlurSungai

    (1%!m)

    (m!

    /2)

    (m!/2)

    0arena R> 2 maka ti,ak terja,i ero2i ,an ti,ak ,i7erluka

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    Pen,imen2ian Saluran 1#

    ;b h

    (m) (m)

    1!.$ &.1

    1!.8 &.1%.%%11 1!.9$ 1!.9 &.1

    1& &.1

    %.%%%9 1&9.$! 1&.1 &.1

    1&.# &.1

    %.%%%9 "9.89

    ; > 1!.9$

    %.%%%1#18 89.8& n > %.%!

    ,imana C

    B > (b m h

    +er,a2arkan ha2il ,iata2F b

    b h

    (m) (m)

    1!.$ &.1

    (m!/2)

    bangunan terjun

    ;ka7

    0a7a2ita2 7engaliran > 1

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    m ;ka7 B P R

    (m#) (m) (m)

    1 %.%%11 1&.9$ $#.98 #".!% #.88

    1 %.%%11 1.%8 $!.!9 #".&% #.891 %.%%11 1$.19 $!.8% #"."% #.89

    1 %.%%11 18.!% $&.#1 #".% #.9%

    1 %.%%11 19.&1 $&.# #".$% #.9%

    1 %.%%11 1$%."! $".%! #".8% #.91

    h

    e2arnya ka7a2ita2 7engaliran alur 2ungai lebih be2ar ,ari ; banjir yaitu C

    m i ;ka7 B P R

    (m#) (m) (m)

    1 %.%%11 1&.9$ $#.98 #".!% #.88

    (m!/2)

    m!/2

    (m!/2)

    ."9 m!/2 ;banjir > 1".9& m!/2

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    Saluran #!

    b h m i ;ka7

    (m) (m)

    1!.$ &.1 1 %.%%%9 1&$.$&

    1!.8 &.1 1 %.%%%9 1&8.$!1!.9 &.1 1 %.%%%9 1&9.$!

    1& &.1 1 %.%%%9 1"%.$#

    1&.1 &.1 1 %.%%%9 1"1.$#

    1&.# &.1 1 %.%%%9 1"#.$1

    ; > 1&9.$!

    n > %.%!

    ,imana C

    B > (b m h) h

    +er,a2arkan ha2il ,iata2F be2arnya ka7a2ita2 7engaliran alur 2unga

    b h m i ;ka7

    (m) (m)

    1!.9 &.1 1 %.%%%9 1&9.$!

    (m!/2)

    m!/2

    ;ka7

    (m!/2)

    0a7a2ita2 7engaliran > 1&9."& m!/2 > ;banjir > 1&9."& m!/2

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    Saluran !&

    B P R b

    (m#) (m) (m) (m)

    $#.98 #".!% #.88 &."

    $!.!9 #".&% #.89 &.$!.8% #"."% #.89 &.$

    $&.#1 #".% #.9% &.8

    $&.# #".$% #.9% &.9

    $".%! #".8% #.91 "

    ; >

    n >

    ,imana C

    lebih be2ar ,ari ; banjir yaitu C +er,a2arkan

    B P R b

    (m#) (m) (m) (m)

    $!.8% #"."% #.89 &.$

    0a7a2ita2 7e

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    h m i ;ka7 B P R

    (m) (m#) (m) (m)

    &.1 1 %.%%%9 "8.89 !".# 1.1% #.19

    &.1 1 %.%%%9 "9.$9 !".$ 1.#% #.#%&.1 1 %.%%%9 %.9 !.%8 1.!% #.#1

    &.1 1 %.%%%9 1."9 !.&9 1.&% #.#!

    &.1 1 %.%%%9 #."% !.9% 1."% #.#&

    &.1 1 %.%%%9 !.&% !$.!1 1.% #.#"

    "9.89

    %.%!

    B > (b m h) h

    ha2il ,iata2F be2arnya ka7a2ita2 7engaliran alur 2ungai lebih be2ar ,ari ; banjir yaitu C

    h m i ;ka7 B P R

    (m) (m#) (m) (m)

    &.1 1 %.%%%9 %.9 !.%8 1.!% #.#1

    (m!/2)

    m!/2

    ;ka7

    (m!/2)

    galiran > "9F8$ m!/2 ;banjir > "9F8# m!/2

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    Saluran !"

    b h m i

    (m) (m)

    #!.& &.1 1 %.%%%1

    #!." &.1 1 %.%%%1#!." &.1" 1 %.%%%1

    #!.$ &.1 1 %.%%%1

    #!.8 &.1 1 %.%%%1

    #!.9 &.1 1 %.%%%1

    ; > 89.8&

    n > %.%!

    ,imana C

    B > (b m h) h

    +er,a2arkan ha2il ,iata2F be2arnya ka7a2ita2 7engalir

    b h m i

    (m) (m)

    #!.& &.1 1 %.%%%1

    m!/2

    ;ka7

    0a7a2ita2 7engaliran > 89F$8 m!/2 ;banjir > 89F$#

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    ;ka7 B P R

    (m#) (m) (m)

    9%."% 11#.$" !".%% !.##

    9%.8$ 11!.1 !".1% !.##9#.$ 11&.$" !".#& !.#

    91.! 11!.98 !".!% !.#!

    9#.%% 11&.!9 !".&% !.#!

    9#.!8 11&.8% !"."% !.#!

    n alur 2ungai lebih be2ar ,ari ; banjir yaitu C

    ;ka7 B P R

    (m#) (m) (m)

    9%."% 11#.$" !".%% !.##

    (m!/2)

    (m!/2)

    m!/2

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    Saluran !"

    b h m i ;ka7 B

    (m) (m) (m#)

    #!." 1.1" 1 %.%%%1 1%.8& #8.!"

    Saluran #!

    b h m i ;ka7 B

    (m) (m) (m#)

    1!.9 1.1 1 %.%%%9 1.1& 1."%

    -T-0 +BG-B PGBT-R +B@R

    (m!/2)

    (m!/2)

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    P R

    (m) (m)

    #.$" 1.%

    P R

    (m) (m)

    1$.%1 %.9$

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    Tabel #.1. 5ata n6lo3

    T (jam) % 1 # !

    8 1#& #8& !$&

    Tabel #.!. olume Tam7ungan 0olam

    k (m) #% #%." #1 #1."

    %."& #.& 8." 1

    Saluran; ;kolam

    1# 1!.9$

    1&.#"

    #! 1&9.$!

    Tabel #.1. 5ata ;kolam

    T (jam) % 1 # !

    %.%% 1#&.%% 1&9.$! 1&9.$!

    ; (m!/2)

    k (1%&m!)

    (m!/2) (m!/2)

    ; (m!/2)

    0 1 2 3 4 5 6 7 8 9 100

    50

    100

    150

    200

    250

    300

    350

    400

    Q (m3/s)

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    Jam

    0 5 10 15 20 25 30 35

    20

    20.5

    21

    21.5

    22

    22.5

    23

    23.5

    24

    f(x) 0.0749171956x ! 20.2269334125

    v (x10000 m3)

    h (m)

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    & " $ 8 9 1%

    !1& #& 19" 1&& 9& % !&

    ## ##." #! #!."

    #! !%.& !$.& &&.&

    & " $ 8 9 1%

    1&9.$! 1&9.$! 1&9.$! 1&9.$! 9&.%% %.%% !&.%%

    11 12

    I*+,#

    -,/$

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    0 45 50

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    11 1#T =t ;1 ;#

    #% 1%

    (2)

    % 8 8.%%

    !%%

    1 1#& 1#$.%%

    !%%

    # #8& 1&9.$!

    !%%

    ! !$& 1&9.$!

    !%%

    & !1& 1&9.$!!%%

    " #& 1&9.$!

    !%%

    19" 1&9.$!

    !%%

    $ 1&& 1&$.%%

    11 1#

    #%.%% 1%.%%

    h B

    (m) (m!) (m#)

    #%.%% %.%% %.%% #%

    #%.&8 #. $1#.&9

    #%.9$ 8.8$ 9"&.8%

    #1."1 1".8 1%#&.&$

    (m!/2) (m!/2)

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    #1.9% #%.88 1%&8.9#

    ##.1# #!.$" 1%"8.$"

    %.%% #&."$ IBD-J

    %.%% #&."$ IBD-J

    ##.1# #!.$" 1%"8.$"

    #1.9% #%.88 1%&8.9#

    #1."1 1".8 1%#&.&$

    #%.9$ 8.8$ 9"&.8%

    #%.&8 #. $1#.&9

    #%.%% %.%% %.%%

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    Tabel Penam

    ;kolam total kolam leAa2ib

    (m)

    1!.9

    %.%% %

    %.%% #%

    %.%% %.%% Tabel ,an Gr

    #. #% h

    1!&.#$ #. (m)

    .&" #%.&8 %

    ##&.#$ 8.8$ %.#%"

    .99 #%.9$ %.&1

    1&.#$ 1".8 %.1"".%1 #1."1 %.8#

    11&.#$ #%.88 1.%#"

    #.8$ #1.9% 1.#!

    &".#$ #!.$" 1.&!"

    %.81 ##.1# 1.&

    %.%% #&."$ 1.8&"

    ik total #&."$ #.%"

    #.#""

    #.&

    #."

    #.8$

    !.%$"

    !.#8

    !.&8"

    !.9

    !.89"

    &.1

    (m!/2) (1%"m!) (1%"m!)

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    ang Saluran #!

    h m i ;ka7 B P R

    (m) (m!/2) (m#) (m) (m)

    &.1 1 %.%%%89$& 1&9.$#&%" $!.8 #"."% #.89

    a6ik Hubungan antara ; ,an h

    ;

    (m!/2)

    %.%%

    1.$

    &.$!

    8.$%1!.!9

    18.$#

    #&.%

    !1.%%

    !$.88

    &".#%

    "#.9&

    1.%$

    9."9

    $8.&

    8$.9

    9$.#"

    1%$.1&

    11$.!!

    1#$.8&

    1!8.&

    1&9.$#&%"

    0.00 20.00 40.00 60.00 80.00 100.00

    0

    0.5

    1

    1.5

    2

    2.5

    3

    3.5

    4

    4.5

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    1.8

    &.1

    1&9.$#&%"

    120.00 140.00 160.00

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    Tabel Penam7ang Saluran !&

    b h m i ;ka7 B P

    (m) (m) % % (m!/2) (m#) (m)

    &.$ &.1 1 %.%%%9 %.9 !.%8 1.!%

    Tabel ,an Gra6ik Hubungan antara ; ,an h

    h ;

    (m) (m!/2)

    %.%% %.%%

    %.#1 %.8

    %.&1 1.9#

    %.# !."!%.8# ".&!

    1.%! $."9

    1.#! 9.9$

    1.&& 1#."$

    1.& 1".!"

    1.8" 18.!#

    #.%" #1.&

    #.# #&.$

    #.& #8.#1

    #.$ !1.8%

    #.8$ !"."&

    !.%8 !9.

    !.#8 &!.&!

    !.&9 &$." h (m) %.%% %.#1

    !.9 "1.8# ; (m!/2) %.%% %.8

    !.9% ".#%

    &.1% %.9

    0.00 10.00 20.00 30.00

    0.00

    1.00

    2.00

    3.00

    4.00

    5.00

    Lengkung

    Q (

    h (m)

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    R #.

    (m)

    #.#1 &.1

    %.9

    %.&1 %.# %.8# 1.%! 1.#! 1.&& 1.&

    1.9# !."! ".&! $."9 9.9$ 1#."$ 1".!"

    40.00 50.00 60.00 70.00

    Debit

    3/s)

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    1.8" #.%" #.# #.& #.$ #.8$ !.%8

    18.!# #1.& #&.$ #8.#1 !1.8% !"."& !9.

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    !.#8 !.&9 !.9 !.9% &.1%

    &!.&! &$." "1.8# ".#% %.9

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    hQ A P R

    (m^3/s) (m^2) (m) (m) (m/s)

    %.$9$### &.1#&!#1 9%."% 11!."# !".%$ !.#& %.%!#

    %.$999!!" &.11#1 9%."% 11!.1! !".%! !.#! %.%!!

    %.8%#%$" &.1 9%."% 11#.$" !".%% !.## %.%!!

    b #!.&%

    m 1.%%

    V2/2g

    0.00 50.00 100.00 150.00 200.00 250.00 300.00 350.00 4

    2.00

    1.00

    0.00

    1.00

    2.00

    3.00

    4.00

    Backwater

    Jarak (m)

    Elevasi (m)

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    h Q A P R

    (m^3/s) (m^2) (m) (m) (m/s)

    %.$9$#"$1 &.1#& 9%."% 11!."1 !".% !.#& %.%!#

    %.$999!!" &.11# 9%."% 11!.1! !".%! !.#! %.%!!

    %.8%#%$" &.1 9%."% 11#.$" !".%% !.## %.%!!

    h Q A P R

    (m^3/s) (m^2) (m) (m) (m/s)

    %.$9$### &.1#&!#1 9%."% 11!."# !".%$ !.#& %.%!#

    %.$999!!" &.11#1 9%."% 11!.1! !".%! !.#! %.%!!

    %.8%#%$" &.1 9%."% 11#.$" !".%% !.## %.%!!

    h Q A P R

    V(m^3/s) (m^2) (m) (m)

    &.1#&1" 9%." 11!."1&198 !".%&9%%# !.#!$#"998 %.$9$#"$1

    &.11#1 9%." 11!.1!&&%& !".%!%9&&9 !.##9""1 %.$999!!"

    &.1 9%." 11#.$" !&.99""1# !.##1$&%! %.8%#%$"

    V2/2g

    V2/2g

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    E EdSF Sf rata

    (m) (m)

    &.1"$ %.%%%119&&

    %.%1 %.%%%1#%%&

    &.1&" %.%%%1#%&

    %.%1 %.%%%1#1#"

    &.1!! %.%%%1#18

    So %.%%%1#

    elA " 1.&"

    "

    0.7972570977

    0.7999335031

    0.8026607539

    00.00 450.00

    T* -/ A

    D/&/ S//*

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    V E Ed SF Sf rata

    (m) (m)

    %.$9$ &.1" %.%%%119&"

    %.%118 %.%%%1#%%"

    %.8%% &.1&&8 %.%%%1#%&

    %.%119 %.%%%1#1#"

    %.8%! &.1!#8 %.%%%1#18

    E EdSF Sf rata

    (m) (m)

    &.1"$ %.%%%119&&

    %.%1 %.%%%1#%%&

    &.1&" %.%%%1#%&

    %.%1 %.%%%1#1#"&.1!! %.%%%1#18

    E Ed SF Sf rata

    (m/s) (m) (m)

    %.%!#!9&8 &.1""1&8 %.%%%119&"&"

    %.%11$8$1#!9 %.%%%1#%%&$"

    %.%!#1&!" &.1&&$$&!" %.%%%1#%&%"

    %.%119!$#!! %.%%%1#1#&89

    %.%!#8!$1# &.1!#8!$1# %.%%%1#18"$!

    V2/2g

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    dX X b h m i ;ka7

    m m (m) (m)

    %.%% #!.& &.1 1 %.%%%% I5/%J

    1%1.!1

    1%1.!1

    1%%.#9

    #%1.%

    h $/

    ($) ($) ($)

    1.&! %.%% &.1#

    1.&! 1%%.%% &.1#

    1.&! #%%.#9 &.1#

    (m!/2)

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    dX X

    m m

    %.%%

    1%%.%%

    1%%.%%

    1%%

    #%%

    dX X

    m m

    %.%%

    1%1.!1

    1%1.!1

    1%%.#9#%1.%

    dX X

    m m

    %

    1%%.%%#%$$

    1%%.%%#%$$

    1%%.#89"$#

    #%%.#91"

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    B P R

    (m#) (m) (m)

    11#.$" !".%% !.##

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