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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#"
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0.7972570977
0.7999335031
0.8026607539
00.00 450.00
T* -/ A
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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#%%&
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E Ed SF Sf rata
(m/s) (m) (m)
%.%!#!9&8 &.1""1&8 %.%%%119&"&"
%.%11$8$1#!9 %.%%%1#%%&$"
%.%!#1&!" &.1&&$$&!" %.%%%1#%&%"
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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
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1.&! 1%%.%% &.1#
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(m!/2)
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dX X
m m
%.%%
1%%.%%
1%%.%%
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B P R
(m#) (m) (m)
11#.$" !".%% !.##
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