Sand Drainase

8/17/2019 Sand Drainase

1/38

BAB III

PERHITUNGAN CURAH HUJAN

3.1. DATA CURAH HUJAN

No. Tahun

Curah Hujan

Sta A Sta B Sta C

1 1992 199 160 235

2 1993 160 175 180

3 1994 185 225 140

4 1995 175 175 220

5 1996 150 210 265

6 1997 245 150 270

7 1998 240 235 175

8 1999 90 165 190

9 2000 210 135 235

10 2001 215 239 21511 2002 110 240 205

12 2003 210 190 160

13 2004 260 190 105

14 2005 215 240 110

15 2006 90 215 260

16 2007 170 240 235

17 2008 200 160 175

18 2009 195 250 190

19 2010 215 160 210

20 2011 165 225 20021 2012 165 215 186

Sumber : Data Curah Hujan


2/38

ILAI K DISTRIBUSI LOG PEARSO TIPE III

Kemencenan Per!o"e U#an $Tahun%

$C&% ' ( 1) ') '( () 1)) ')) ()) 1)))

3 -0.36 0.42 1.18 1.912 2.278 3.152 4.051 4.97 5.825 7.25

2.5 -0.36 0.518 1.25 1.9246666667 2.262 3.048 3.845 4.652 5.3825 6.62.2 -0.33 0.574 1.284 1.9213333333 2.24 2.97 3.705 4.444 5.1025 6.2

2 -0.307 0.609 1.302 1.9133333333 2.219 2.912 3.605 4.298 4.9025 5.91

1.8 -0.282 0.643 1.318 1.9013333333 2.193 2.848 3.499 4.147 4.714375 5.66

1.6 -0.254 0.675 1.329 1.885 2.163 2.78 3.388 3.99 4.515 5.39

1.4 -0.225 0.705 1.337 1.8643333333 2.128 2.706 3.271 3.828 4.30875 5.11

1.2 -0.195 0.732 1.34 1.838 2.087 2.626 3.149 3.661 4.095625 4.82

1 -0.164 0.758 1.34 1.8086666667 2.043 2.542 3.022 3.489 3.883125 4.54

0.9 -0.148 0.769 1.339 1.7916666667 2.018 2.498 2.957 3.401 3.77375 4.395

0.8 -0.132 0.78 1.336 1.7773333333 1.998 2.453 2.891 3.312 3.66375 4.25

0.7 -0.116 0.79 1.333 1.7556666667 1.967 2.407 2.824 3.223 3.55375 4.105

0.6 -0.099 0.8 1.328 1.7353333333 1.939 2.359 2.755 3.132 3.4425 3.96

0.5 -0.083 0.808 1.323 1.7143333333 1.91 2.311 2.686 3.041 3.33125 3.815

0.4 -0.066 0.816 1.317 1.6923333333 1.88 2.261 2.615 2.949 3.219375 3.67

0.3 -0.05 0.824 1.309 1.669 1.849 2.211 2.544 2.856 3.106875 3.525

0.2 -0.033 0.842 1.282 1.5946666667 1.751 2.054 2.326 2.576 2.76875 3.09

0.1 -0.017 0.836 1.27 1.5973333333 1.761 2 2.252 2.482 3.0325 3.95

0 0 0.842 1.282 1.5946666667 1.751 2.054 2.326 2.576 2.76875 3.09

-0.1 0.017 0.85 1.258 1.5393333333 1.68 1.945 2.178 2.388 2.97375 3.95

-0.2 0.01657978 0.849962 1.25816554 1.5397026163 1.6804711542 1.94570036 2.17894231 2.389197 2.980586511 3.966235718

-0.3 0.05 0.853 1.245 1.5103333333 1.643 1.89 2.104 2.294 2.436875 2.675

-0.4 0.066 0.855 1.231 1.481 1.606 1.834 2.029 2.21 2.33375 2.54

-0.5 0.083 0.856 1.26 1.4646666667 1.567 1.777 1.955 2.108 2.2175 2.4

-0.6 0.099 0.857 1.2 1.4186666667 1.528 1.72 1.88 2.016 2.113125 2.275

-0.7 0.116 0.857 1.183 1.3863333333 1.488 1.663 1.806 1.926 2.01 2.15

-0.8 0.132 0.856 1.166 1.354 1.448 1.606 1.733 1.873 1.93375 2.035

-0.9 0.148 0.854 1.147 1.3203333333 1.407 1.549 1.66 1.749 1.809375 1.91

-1 0.164 0.852 1.128 1.2866666667 1.366 1.492 1.588 1.664 1.715 1.8

-1.2 0.195 0.844 1.086 1.2166666667 1.282 1.379 1.449 1.501 1.5475 1.625

-1.4 0.225 0.832 1.041 1.1456666667 1.198 1.2701 1.318 1.351 1.39375 1.465

-0.0974532207 0.03613072 0.929691 1.34709849 1.6037289507 1.7320441795 1.9480756 2.1060408 2.2302191 2.395082837 2.669855771

-1.6 0.254 0.817 0.994 1.0753333333 1.116 1.166 1.197 1.216 1.24 1.28

-1.8 0.282 0.799 0.945 1.005 1.035 1.069 1.087 1.097 1.109375 1.13

-2 0.307 0.777 0.895 0.9376666667 0.959 0.98 0.99 1.995 1.621875 1

-2.2 0.33 0.752 0.844 0.8733333333 0.888 0.9 0.905 0.907 0.908125 0.91

-2.5 0.36 0.711 0.771 0.7856666667 0.793 0.798 0.799 0.8 0.80075 0.802

-3 0.396 0.636 0.66 0.664 0.666 0.666 0.667 0.667 0.667375 0.668


3/38

3.' PERHITUNGAN CURAH HUJAN RENCANA

3.'.1 Ta*e# D!&tr!*u&! +re,uen&!

No. TahunCurah Hujan

X' (X-X')Sta A Sta B Sta C

1 1992 199 160 235 198.00 39204.00 4.05 16.382 1993 160 175 180 171.67 29469.44 -22.29 496.653 1994 185 225 140 183.33 33611.11 -10.62 112.764 1995 175 175 220 190.00 36100.00 -3.95 15.625 1996 150 210 265 208.33 43402.78 14.38 206.816 1997 245 150 270 221.67 49136.11 27.71 768.087 1998 240 235 175 216.67 46944.44 22.71 515.948 1999 90 165 190 148.33 22002.78 -45.62 2081.109 2000 210 135 235 193.33 37377.78 -0.62 0.3810 2001 215 239 215 223.00 49729.00 29.05 843.7611 2002 110 240 205 185.00 34225.00 -8.95 80.1512 2003 210 190 160 186.67 34844.44 -7.29 53.0813 2004 260 190 105 185.00 34225.00 -8.95 80.1514 2005 215 240 110 188.33 35469.44 -5.62 31.57

15 2006 90 215 260 188.33 35469.44 -5.62 31.5716 2007 170 240 235 215.00 46225.00 21.05 443.0017 2008 200 160 175 178.33 31802.78 -15.62 243.9518 2009 195 250 190 211.67 44802.78 17.71 313.8019 2010 215 160 210 195.00 38025.00 1.05 1.1020 2011 165 225 200 196.67 38677.78 2.71 7.3721 2012 165 215 186 188.67 35595.11 -5.29 27.94

∑ 4073 796339.22222 3.6948222E-013 6371.174603Rata-Rata 193.9523809524

3.'.' Perh!tunan Parameter Stat!&t!, "a#am D!&tr!*u&! +re,uen&!

A. Standar Deviasi

Sx = (( x' - x )2

) ½n-1

= (6371.1746

)½20

= 17.8482136

B. Harga Koefisien Asimetri

Cs =

=

-796743.428571421

2160567.62371548

= -0.3687657909

C. Harga Koefisien Kurtosis

Ck =

=2899326935.74603 2899326935.7694120905.592744 44969152473

= 4.176976824

D. Harga Koefisien Variasi

Distribusi Log Normal

Cv =Sx Cv = 0.0920236893X Cs =

=

=17.8482136 = 0.2845394272193.952381

X² (X-X')²

n.∑ ( x! - x )³(n-1).(n-2).Sx³

n².∑ ( x! - x )⁴(n-1).(n-2).(n-3).Sx⁴

3.Cv"Cv²3.(0#170) " (0#170)²

SYA


4/38

3.'.3 -eto"e o Pear&on III

No Tahun /! $mm% o /!

1 1992 4.047619 0.6072 Err:502 Err:5022

1993 -22.28571 Err:502 Err:502 Err:5023 1994 -10.61905 Err:502 Err:502 Err:5024 1995 -3.952381 Err:502 Err:502 Err:5025 1996 14.38095 1.1578 Err:502 Err:5026 1997 27.71429 1.4427 Err:502 Err:5027 1998 22.71429 1.3563 Err:502 Err:5028 1999 -45.61905 Err:502 Err:502 Err:5029 2000 -0.619048 Err:502 Err:502 Err:502

10 2001 29.04762 1.4631 Err:502 Err:50211 2002 -8.952381 Err:502 Err:502 Err:50212 2003 -7.285714 Err:502 Err:502 Err:50213 2004 -8.952381 Err:502 Err:502 Err:50214 2005 -5.619048 Err:502 Err:502 Err:50215 2006 -5.619048 Err:502 Err:502 Err:50216 2007 21.04762 1.3232 Err:502 Err:50217 2008 -15.61905 Err:502 Err:502 Err:50218 2009 17.71429 1.2483 Err:502 Err:50219 2010 1.047619 0.0202 Err:502 Err:50220 2011 2.714286 0.4337 Err:502 Err:50221 2012 -5.285714 Err:502 Err:502 Err:502

Jumlah Err:502 Err:502 Err:502

n 21

!"# $ Err:502

Err0()'21

S% C& 'n - 1(

Err:502

20 . Err:502

20 20 18 19 . ))) 3

Err0()' Err0()'

*er+a&ar,an nla C& Err:502 ma,a +er"leh nla / untu, &eta er"+e ulan# 'tabel 3(

!"# $ !"# $ / . S%Ta*e# 1.1T (tahun) K o / S2 /! $mm%

2 0.017 Err:502 Err:502 Err0()'

5 0.850 Err:502 Err:502 Err0()'1.258 Err:502 Err:502 Err0()'

15 2.098 Err:502 Err:502 Err0()'

3.'. Ta*e# Re,a4!tu#a&! Perh!tunan Curah Hujan Rencana

Curah Hujan ata -ata +en#an et"+e !"# ear&"n e

EDE !; -

1 2 Err:5022 5 Err:502

3 10 Err:5024 15 Err:502

$o /! 5 o /%' $o /! 5 o /%3

!"# $ - !"# $ n-1 . !"# $ - !"# $

'n - 1('n - 2('n-3('S%(


5/38


6/38

3.'. Ta*e# Re,a4!tu#a&! Perh!tunan Curah Hujan Rencana

CH HJ - DE; EDE !; ES

EDE !; -

1 2 Err:502

2 5 Err:502

3 10 Err:502

4 15 Err:502


7/38

3.3 PERHITUNGAN INTENSITAS CURAH HUJAN

3.3.1 Inten&!ta& Curah Hujan Rencana Denan -eto"e -onono*e

I 6 R / $ (( t

D,etahu :

Err:502 mm

Err:502 mm

10 Err:502 mm

15 Err:502 mm

ntu, t 1 jam

Err:502

% '

5

Err:502 mm


8/38

ntu, t 3 jam

Err:502% '

5 Err:502 mm


9/38

0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.50.000

2.000

4.000

6.000

8.000

10.000

12.000

GA!IK IN"#NSI"AS C$AH H$%AN "'D# &'N'N'B#

C$%&n

(a)tu * +am ,

I n t e n s i t a s * m m

- + a m ,


10/38

8.5 8 7.5 7 6.5 6.0 5.5

b =

0 1 2 3 4 5 6

h * C D

C C1 C

9

*0 *1 *2 *3 *4 *5

C0 C1 C2 C3

D0

#>

C1

9.5 E0

?0 ?1 >

C3

;0 ;1 ;2 ;3

@

> $ H0 H1 H2

C3 C3 ?

10

0 1 2

$

J0 J1 J2 J3 J4 C J5 J6

E

ea

Di)etaui /

1 = 0.3 C1 = 0.4 C4 = 0.6

2 = 0.4 C2 = 0.5

3 = 0.5 C3 = 0.7

a = 150 * = 200 k = 200

+ = 300 , = 150 % = 75

= 100 = 100 = 200

/ = 200 ! = 50

= 50 = 200

Lebar %alan 0 "rotoar /

a%an = 25 = 0.5 X0 = 10 X6 = 7

a%an B = 25 X1 = 9.5 X7 = 6.5

a%an C = 25 X2 = 9 X8 = 6

a%an = 25 X3 = 8.5 X9 = 5.5

a%an E = 25 X4 = 8 X10 = 5

A3

A1

A2

3/t!k

3/t!k

3/t!k

C a%an


11/38

BAB I8

PERHITUNGAN DAN PERENCANAAN

.1 DATA DASAR

.1.1 Data Curah Hujan

No TahunCurah Hujan $mm%

Sta A Sta B Sta C

1 1992 199 160 235

2 1993 160 175 180

3 1994 185 225 140

4 1995 175 175 220

5 1996 150 210 265

6 1997 245 150 270

7 1998 240 235 175

8 1999 90 165 1909 2000 210 135 235

10 2001 215 239 215

11 2002 110 240 205

12 2003 210 190 160

13 2004 260 190 105

14 2005 215 240 110

15 2006 90 215 260

16 2007 170 240 235

17 2008 200 160 175

18 2009 195 250 19019 2010 215 160 210

20 2011 165 225 200

21 2012 165 215 186


12/38

.1.' Data To4ora9!

umu& erhtun#an EleBa& anjan# !ahan erjauh +an ,emrn#an lahan

n

m

erhtun#an EleBa& al +an ,hr

$ Jara, areal ,e #ar& ber,utna 'm(

r Jara, antar ,"ntur 'm(

r nterBal antar ,"ntur an# membata& tt,

Sehn##a tn## eleBa& /"ntur -$

erhtun#an anjan# lahan terjauh

6

/emrn#an !ahan

StE aal - E a,hr

% 100!t

en=ar !ua& lahan

m % n

Perh!tunan ua& Area#

PETAK Panjang Lebar Luas

(m) (m) (Ha)

400 590 23.6

400 600 24

400 400 16

> 1000 900 90

> 500 1200 60

> 1200 400 48

> 1000 900 90

> 1000 590 59

$ 1000 600 60

$ 300 400 12

$ 300 900 27

Den#an men#a=u a+a +enah +aat +buat tabel +ata t""#ra@ &eba#a ber,ut :

No Peta, ua& Area# E#e:a&! $ m % Panjan #ahan $ t % Kem!r!nan

$ Ha % A;a# A,h!r $ m % ahan $ < %

1 23.60 8.25 7.45 712.81 0.11223

2 24.00 7.65 6.5 721.11 0.15948

3 16.00 6.85 5.55 565.69 0.22981

4 > 90.00 6.78 5.3 1345.36 0.11001

5 > 60.00 8.78 7 1300.00 0.13692

6 > 48.00 8.37 6.5 1264.91 0.14784

7 > 90.00 8 6.5 1345.36 0.11149

8 > 59.00 9.5 8.45 1161.08 0.09043

9 $ 60.00 9.02 8 1166.19 0.08746

10 $ 12.00 8.8 8.3 500.00 0.10000

t' m2 n2

110109

108

P

Lt


13/38

11 $ 27.00 8.47 7.68 948.68 0.08327

Jum#ah 509.60


14/38

.1.3 Data Sa#uran

No Sa#uranE#e:a&! $ m % Panjan Kem!r!nan

A;a# A,h!r Sa#uran $ m % Sa#uran $ < %

1 7.98 7.45 590 0.09

2 7.38 6.50 600 0.15

3 6.00 5.55 400 0.11

4 5.75 5.30 900 0.05

5 7.80 7.45 400 0.09

6 6.83 6.50 400 0.08

7 6.35 5.55 400 0.20

8 6.35 5.30 1000 0.11

9 8.40 6.90 1200 0.13

10 6.90 6.50 400 0.10

11 7.92 7.00 500 0.18

12 8.15 6.50 1200 0.14

13 6.85 6.50 900 0.04

14 7.63 6.50 1000 0.11

15 8.77 8.45 590 0.05

16 8.38 8.00 600 0.06

17 9.22 8.45 1000 0.08

18 8.80 8.00 1000 0.08

19 8.40 8.30 400 0.02

20 8.25 7.68 900 0.06

21 8.50 8.30 300 0.07

22 8.32 7.68 300 0.21

23 9.50 9.22 590 0.05

24 9.02 8.80 600 0.04

25 8.80 8.50 400 0.08

26 8.47 8.32 900 0.02

0 -

1

2 -

3

4 -

5

6 -

7

*1 -

1

*3 -

3

*5 -

5

D1 -

7

C0 - C

1

C2 - C

3

?1 - C1

H1 - C

3

E0 - E

1

H3 - E

1

;0 - ;

1

;2 - ;

3

J1 - ;

1

J3 - ;

3

0

- 1

2 -

3

J5 -

1

J7 -

3

J0 - J

1

J2 - J

3

J4 - J

5

J6 - J

7


15/38

.'.' Contoh Perh!tunan De*!t

=& 6 )>))'?@ . C&. Cr. I.A

C& 6' tc

t= t" t+' tc t"

t+ !&

B

Cr 6

to 6 ).)1?t

St

,et. :

!ua& areal 'Ha(

!& anjan# Saluran 'm(

!t anjan# lahan terjauh 'm(

St /emrn#an lahan '(

t" Fa,tu untu, men#alr +ar ermu,aan lahan ,e &aluran ter+e,at 'ment(

t+ Fa,tu en#alran +alam &aluran 'ment(

t= Fa,tu en#umulan ar 'ment(

C& /"e@&en enamun#an

Cr /"e@&en en#alran rata-rata

nten&ta& =urah hujan 'mm


16/38

t" 6&

B 0.4 m


17/38

to 6 ).)1? 2t ).??

St

t" 0.0197 %1161.0771 0.77

0.0301

t" 67.0228 ment

t" 6&

B 0.4 m


18/38

+,etahu +ata-+ata &bb :

16.00 Ha 160000

1 Ha 10000

!& 400 m

!t 565.69 m

St 0.0023

Cj 0.5

0.6

to 6 ).)1? 2t ).??

St

t" 0.0197 %565.6854 0.77

0.0479

t" 26.9043 ment

t" 6&

B 0.4 m


19/38

Err:502 m3


20/38

.'.3 TABE PERHITUNGAN DEBIT $=% CURAH HUJAN UNTUK PERIDE UANG ' TAHUN> ( TAHUN> DAN 1) TAHUN

Tabel 4.2.%.#. Debit &en'ana ntu Periode lang 2 Tahun (!aluran Tersier)

No

A#!ran Permu,aan A#!ran "a#am &a#urantc

C& Cr

Curah Hujanua& $A%

t St to & 8 t" T I

$m% men!t $m% m7"t, men!t men!t Thn m7jam

1 712.811 0.0011 42.361 590 0.40 24.583 66.944 0.845 0.500 2 Err:502 23.60 Err:502

2 712.811 0.0011 42.361 400 0.40 16.667 59.027 0.876 0.500 2 Err:502 23.6 Err:502

3 1300.00 0.00136923 62.325 1200 0.40 50.000 112.325 0.818 0.500 2 Err:502 60.00 Err:502

4 1264.91 0.00147836 59.250 400 0.40 16.667 75.916 0.901 0.500 2 Err:502 48.00 Err:502

5 1345.36 0.00111494 69.260 900 0.40 37.500 106.760 0.851 0.501 2 Err:502 90.00 Err:502

6 1161.08 0.00090433 67.023 590 0.40 24.583 91.606 0.882 0.500 2 Err:502 59.00 Err:502

7 500.00 0.001 33.703 400 0.40 16.667 50.370 0.858 0.500 2 Err:502 12.00 Err:502

8 948.68 0.08327331 10.057 900 0.40 37.500 47.557 0.717 0.500 2 Err:502 27.00 Err:502

9 1161.08 0.00090433 67.023 590 0.40 24.583 91.606 0.882 0.500 2 Err:502 59.00 Err:502

10 1166.190 0.0009 68.120 600 0.40 25.000 93.120 0.882 0.500 2 Err:502 60.00 Err:502

11 500.000 0.0010 33.703 400 0.40 16.667 50.370 0.858 0.500 2 Err:502 12.00 Err:502

12 948.683 0.0008 59.218 900 0.40 37.500 96.718 0.838 0.500 2 Err:502 27.00 Err:502

Nama&a#uran

=Rencana$m37"et%m'

0 - 1

1 - *

1

C0 - C

1

C2 - C

3

E0 - E

1

;0 - ;

1

0 -

1

2 -

3

J0 - J

1

J2- J

3

J4 - J

5

J6 - J

7


21/38

Tabel 4.2.%.2 Debit &en'ana ntu Periode lang " Tahun (!aluran !eunder)

No


C& Cr

Curah Hujanua& $A%

t St to & 8 t" T I

$m% men!t $m% m7"t, men!t men!t Thn m7"t,

1 721.110 0.0016 37.333 600 0.40 25.000 62.333 0.833 0.500 5 Err:502 24.00 Err:502

2 721.11 0.0016 37.333 400 0.40 16.667 53.999 0.866 0.500 5 Err:502 24.00 Err:502

3 565.69 0.0023 26.904 400 0.40 16.667 43.571 0.839 0.500 5 Err:502 16.00 Err:5024 1345.36 0.0011 69.619 1000 0.40 41.667 111.285 0.842 0.501 5 Err:502 90.00 Err:502

5 1300.00 0.0014 62.325 500 0.40 20.833 83.158 0.889 0.500 5 Err:502 60.00 Err:502

6 1264.91 0.0015 59.250 1200 0.40 50.000 109.250 0.814 0.500 5 Err:502 48.00 Err:502

7 1345.36 0.0011 69.260 1000 0.40 41.667 110.926 0.842 0.501 5 Err:502 90.00 Err:502

8 1161.08 0.0009 67.023 1000 0.40 41.667 108.690 0.839 0.500 5 Err:502 59.00 Err:502

9 1166.19 0.0009 68.120 600 0.40 25.000 93.120 0.882 0.500 5 Err:502 60.00 Err:502

10 1166.190 0.0009 68.120 1000 0.40 41.667 109.787 0.841 0.500 5 Err:502 60.00 Err:502

11 500.000 0.0010 33.703 300 0.40 12.500 46.203 0.881 0.500 5 Err:502 12.00 Err:502

12 948.683 0.0008 59.218 300 0.40 12.500 71.718 0.920 0.501 5 Err:502 27.00 Err:502

Tabel 4.2.%.% Debit &en'ana ntu Periode lang #$ Tahun (!aluran Primer)

No


C& Cr

Curah Hujanua& $A%

t St to & 8 t" T I

$m% men!t $m% m7"t, men!t men!t Thn m7"t,

1 565.69 0.0022981 26.904 400 0.4 16.667 43.571 0.839 0.500 10 Err:502 16.00 Err:502

2 1345.362 0.0011 69.619 900 0.40 37.500 107.119 0.851 0.501 10 Err:502 90.00 Err:502

Err:502 Err:502

Err:502

Nama&a#uran

=Rencana$m37"et%m'

2 -

3

*3 -

3

*5 -

5

D1 -

7

?1 - C

1

H1 - C

3

H3 - E

1

J1 - ;

1

;2 - ;

3

J3 - ;

3

J5 -

1

J7 -

3

Nama&a#uran

=Rencana$m37"et%m'

4 -

5

6 -

7

At"tal

A '6-

7( A 'D

1-

7(

m3


22/38

02

02

02

02

02

02

02

02

02

02

02

02

u#at!9

et%


23/38

02

02

02

02

02

02

02

02

02

02

02

02

02

02

u#at!9et%

u#at!9

et%


24/38

4. Perhitungan Dimensi Saluran

Dimensi saluran bentuk trapesium

Dimana:

Kecepatan rencana !" # 0.$ m%&tk

K'e(sien kekasaran )annin* n"# 0.02

Kemirin*an talu& rencana m : n # 1 : 2

+

,

1 - 2 -

m

b

enampan* Ek'n'mis

b # 1.5 -

Luas penampang trapesium (A)

A !

/ &imana : # b m.-".-"

Keliling #asah (p)

p

$ari%&ari 'irli* ( R )

R A

P

# b m.-".-

Den*an men**unakan rumus )annin*/ maka ! kecepatan" :

"

Dimana:

! #

3 4 #

p

ket:

#

#p # kelilin* basa- m"

4 # ari6ari -i&r'lis

+,n . R-,3 . S+,-

&ebit m%&tk"

uas m

2

"

b+2h .√ 1+m2

b+2h .√ 1+m2


25/38

# kemirin*an saluran


26/38

#

1.

.

n p

#

# n . ............................................

#

ntuk trapesium &imana b # 1.5 -/ &i&apat:

# b m.-".- / misal m # 1

# 1.5- 1 . - " .-

# 2.5

p ##

#

# $.28 -

Dari persamaan 1/ &i&apat :

# n .

#

#n .

3 n# 0.02

97.;5;#

0.02 .

18.72

5.215 # 0.0000080

# 0.0000015

- # 0.187;1

.............................. 2 "

2% 1%2

n . . 2% 5% . 1%2

5%

p2% 1%2

-2

1.5- 2-.1 " 12

1.5 - 2- . 2

5%

p2% 1%2

2.5.-2 "5 1%

$.28.-"2

1%2

-10

-2 1%2

-81%2

-81%2

%8

1%2

b+2h .√ 1+m2


27/38

Ta#el Perhitungan Dimensi Saluran Tersier


28/38

Ta#el Perhitungan Dimensi Saluran Se*uner


29/38

1.1 Peritungan Dimensi Gorong2gorong dan Keilangan #nergi

Perhitungan Gorong-gorong A3 2 A4

ata-/ata s++

Ban,&nan :%!ntas ,$;$n,-,$;$n, +nt&k S,! :at

= E;;502

= k:atan /! &%& sa%&;an = 0.40 s

= k:atan /!/a%a ,$;$n,-,$;$n, = 1.5 s

= k:atan /! !%!; sa%&;an = 0.4 s

, = :;. ;av!tas! = 9.81

n =


30/38

Keilangan #nergi /

1. k!+at :as&kan

8 6 9.:94 . g

= 0.50

1.5 - 0.40

= 0.0308 2 x 9.81

2. k!+at ,skan

A!%a! k$*!s!n kkasa;an St;!k%; (k) &nt&k +t$n 70

f 6 C* =1

R16

=1

E;;50216

= E;;5024 . g k 70

=E;;502 x 1.5 2

= E;;502 2 x 9.81

3. k!+at :n,%&a;an

o 6 9.334 . g

= 0.11 1.5 - 0.40

= 0.0068 2 x 9.81

4. 6 8 0 f 0 o

= 0.0308 " E;;502 " 0.0068

= E;;502

S)etsa Penam5ang Gorong2Gorong A3 2 A4

E ; ; 9 5 0 2

=

.

/ = E;;502

*v4 2 v

3,4

)2

Cf . v44

*v4 2 v;, 4

) 2

Htotal


31/38

"abel Peritungan Dimensi Gorong2gorong *Bulat,

SK#"SA P#NA&PANG G''NG2G''NG

( )

+ ( )

No Nama Gorong2Gorong

Ke8e5atan Aliran Dimensi KoefisienP

A d b &anning

m-dt m-dt m-dt m m * n , m

1 1 - 2 E;;502 0.40 1.5 0.40 E;;502 E;;502 E;;502 0.02 E;;502

2 3 - 4 E;;502 0.40 1.5 0.40 E;;502 E;;502 E;;502 0.02 E;;502

3 5 - 6 E;;502 0.40 1.5 0.40 E;;502 E;;502 E;;502 0.02 E;;502

4 C1 - B3 E;;502 0.40 1.5 0.40 E;;502 E;;502 E;;502 0.02 E;;502

5 C3 - B5 E;;502 0.40 1.5 0.40 E;;502 E;;502 E;;502 0.02 E;;502

6 E1 - 1 E;;502 0.40 1.5 0.40 E;;502 E;;502 E;;502 0.02 E;;5027 1 - 2 E;;502 0.40 1.5 0.40 E;;502 E;;502 E;;502 0.02 E;;502

8 3 - 1 E;;502 0.40 1.5 0.40 E;;502 E;;502 E;;502 0.02 E;;502

9 1 - 1 E;;502 0.40 1.5 0.40 E;;502 E;;502 E;;502 0.02 E;;502

10 3 - 3 E;;502 0.40 1.5 0.40 E;;502 E;;502 E;;502 0.02 E;;502

No Nama Gorong2Gorong

Keilangan #nergi

8 f o

m m m m

1 1 - 2 0.0308 E;;502 0.0068 E;;5022 3 - 4 0.0308 E;;502 0.0068 E;;5023

5 - 60.0308 E;;502 0.0068 E;;502

4 C1 - B3 0.0308 E;;502 0.0068 E;;5025 C3 - B5 0.0308 E;;502 0.0068 E;;5026 E1 - 1 0.0308 E;;502 0.0068 E;;5027 1 - 2 0.0308 E;;502 0.0068 E;;5028 3 - 1 0.0308 E;;502 0.0068 E;;5029 1 - 1 0.0308 E;;502 0.0068 E;;502

10 3 - 3 0.0308 E;;502 0.0068 E;;502

73 V

3V

4V

;

m; -det m4

Σ

H


32/38

1.: Peritungan Inlet 5ada "rotoar

*!n!s! n%t &+an,-%&+an, /! s!s! a%an an, +;*&n,s! &nt&k na:&n, /an na%&;kan

%!:asan a!; &an an, +;a/a /! s:anan, a%an n&& k /a%a sa%&;an.

!kta&! /ata-/ata s+a,a! +;!k&t

6 - 7

= 900

= 7

= 1

= 10

= 1

=280

x S ≤ 50 D

/!ana D = %+a; a%an ()

s = k!;!n,an a%an () = 2

= a;ak anta;a s;t !n%t ()

=

/!ana

= = %+a; +aan !n%t ()

, = k:atan ,;a*!tas!

/ = k/a%aan a!; ()

A= 2 A>

!k D = 7

S = 0.02 = 2

, = 9.8

• a%&; F;$t$a; an, /!;nanakan

• @anan, Sa%&;an

• +a; a%an

• %+a; t;$t$a;

• a%an " t;$t$a;

• Ba& a%an

• %ara) antara Sreet Inlet * D ,

• Ka5asitas untu) inlet tega)

0#36 x , x /32

ka:as!tas !n%t (3/t)

/t2

Peren8anaan inlet 5ada +alur trotoar

/t2


33/38

%ara) antara Sreet Inlet * D ,

=280

x S ≤ 50 D

280x 2 ≤ 50

7

56.57 ≤ 50 No

S%an&tna &%a !n%t t,ak an, /!+&at /! s:anan, a%an

A =t$t

=900

= 16 56.57

&as 1 !n%t = 12 x D x = 0.5 x 7 x 57

= 0.0198

Ka5asitas inlet tega) *Curb Inlet,

ata-/ata

= 0.02 a st = 2.0

t = 3.501 C = 0.5

s = 900

@;!t&n,an

t$ = 0.0197 ( t ) 1( st ) 0.5

= 0.0197 (3.50069993

)1

= 0.2331 n!t( 2.000 ) 0.5

t/ =s Gnt&k k!;!n,an 0-1 = 0.4

v Gnt&k k!;!n,an 1-2 = 0.6

Gnt&k k!;!n,an 2-4 = 0.9

=900

= 1000.00 /t!k = 16.67 n!t0.9

t = t$ " t/

= 0.233114 " 16.667 = 16.90 n!t

Cs =2 . t

=2 x 16.900

= 0.672 . t " t/ ( 2 x 16.900 ) " 16.67

Guna)an Cura Hu+an &a)simum antara 5eriode ulang 4? :? 39 dan 3: taun

15 =R

x (5

)235 t 60

=

E;;502

x

5 23

= E;;502 a5 16.900 60


34/38

"inggi Genangan Air

/ = 0.046

= 0.046 ( 57 . HHH ( 1 2

= E;;502

/!ana t!n,,! ,nan,an aks!& an, /!!!nkan &nt&k a%&; a%an an, %&;&s = 6.5

A 0.36

/!ana =

, = = 9.81

= +a; +&kaan &;+ ( )

/!a+!% % = 20 = 0.2

/ = k/a%aan a!; /a%a &;+ ()

/!a+!% / = 10 = 0.1

= 0.36 x 9.81 x 0.032 x 0.2

= 0.0223358

= 22.3358 %t/t

S)etsa Inlet /

/ = 0.10

0.20

( . ) 0.5 ( 1 S ) 0.2

) 0.5 ) 0.2

#. +3


35/38

Ta*e# In#et Pa"a Trotoar

" ama Jalan n!ua& '( t0 t+ t=

C&Debt 'A(

'm( 'm( 'm( 'Ha( 'ment( 'ment( 'ment( 'mm


36/38

4. Perhitungan /ut0all *e sungai

>ut?all ke sun*ai @an* &i*unakan a&ala- bentuk trapesium

Diketa-ui &ata sbb:

Debit rencana " # Err:502

Kecepatan air 'ut?all # 0.$0 m%&tk

m # 1.00n # 0.02

Luas penampang #asah (A)

A !

# Err:502

" 0.$0

# Err:502

1en2ari le#ar saluran an *ealaman air

A 3 3 &iasumsikan b # 2-

Err:502 #

- # AAA m

b # AAA m

1en2ari le#ar permu*aan saluran ( T

T # -.m.h

# AAA 2. AA . A

# Err:502

$ari%&ari hirlis ( R )

R A

#

p $.28 -

# Err:502

Err:502

4 # Err:502 m

Tinggi &agaan ( 0# )

0# +. . ! .h+

5

# 2 . AAA . AAA 0.5;0

# Err:502 m

Kehilangan ting*at energi (6)

! @ . A . 4g . 3 &imana : B # k'e(sien &ebit # 1

C # ke-ilan*an tin**i ener*i m"

6 ! * #

@ . A . 4g

# Err:5021 . AAA . 19.;2

C # Err:502 m

m³%&tk

m²

h-

-2

-2

percepatan *ra!itasi m%s2"


37/38


38/38

SK7TSA SAL8RA9

Err0()'

E r r : 5 0 2

+ E;;502

E;;502

HHHB

SK7TSA P79A1PA9

Err:502

Err:502

Err:502

Sand Drainase

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