03 Hidrograf Contoh Soal HSS Snyder

Contoh Perhitungan HSS Snyder  Tabel Perhitungan Perhit ungan Diketahui: -

akibat hujan

Luas DAS Panjang sungai utama jara jarak k titi titik k !ng !ngam amat atan an "!ng "!ngan an titi titik k b!ra b!ratt DAS DAS k*!+isi!n,

A = 290 km2 L = 92 km L# = 44 km n = 0$20 t = 1$22  = 1$26 - t!r!ngaruh *!h  buah hujan !+!kti+ 6 mm3 10 mm "an 4 mm ang b!rs!ang 1 jam

Ditanya: a$ 5itung "!bit maksimum "!ngan m!t*"! 5SS Sn"!r  b$ gambar gra+ik hi"r*gra+na hi"r*gra+na 

Jawab: a$ !nghitung !nghitung "!bit maksimum (7) t

8 tr

= = = = = = =

t(L$L#)n 1322(92<44)032 6$4240.42 jam t8 t8r r2 2 6$9240.42 jam t. t.$. $. 1$2.91..4 jam tr  8r>>>>>>>harus "ik*r!ksi

8:

8

= t0$2.( t0$2.(tr-8 tr-8r) r) = = 8: 8:  tr2 tr2

6$4/64/4 jam

t (jam)

X = t8

1-X

(1-X) 2

((1-X)2)X )X

a;((( a;(((1-X 1-X)) 2)X)

Y

7 (m"!t)

6 mm

10 mm

4 mm

8*ta 7 (m"!t)

0

0$000

1$000

1$000

%D % D&'0

%D&'0

0$000

0 $0 $000

0$000

0$000

0$000

1

0$144

0$.6

0$/2

.$06

1$29.

0$0.1

0$ 0$/16

4$296

0$000

0$000

0 $0 $000 .$ .$012

2

0$29

0$/11

0$.06

1$/.1

0$44/

0$./

.$ .$040

0$242

/$161

0$000

42$44



0$4

0$.6/

0$21

0$/41

0$19

0$64/

9$ 9 $12

.4$/66

.0$40

2$64 11/$162

4

0$./

0$422

0$1/

0$09

0$0/9

0$4

11 11$//2

/0$6.

91$2//

20$161 19$46

.

0$/22

0$2/

0$0//

0$10/

0$02/

0$99

1$2.6

/9$.6

11 11/$/2.

6 6$.11 24/$02

6

0$6/

0$1

0$01

0$021

0$00.

0$9

1$94/

$62

1 12$.60

4/$090 2//$2/9

/

1$011

-0$011

0$000

0$000

0$000

1$000

14$116

4$694

19$469

.$024 291$0



1$1..

-0$1..

0$024

0$021

0$00.

0$9

1$944

$66.

141$1.6

..$/ 294$..2

9

1$00

-0$00

0$090

0$069

0$01

0$960

1$..4

1$2

19$441

.6$462 290$/0

10

1$444

-0$444

0$19/

0$1/

0$0.

0$92

1$026

/$1.

1 1.$.9

..$//6 22$499

11

1$.9

-0$.9

0$4/

0$21

0$0.6

0$0

12$41/

/4$.00

1 10$26

.4$21. 2/1$96

12

1$/

-0$/

0$./

0$10

0$0/9

0$

11$/6

/0$.//

12 124$16/

.2$10. 2.$61

1

1$/

-0$/

0$//0

0$410

0$10.

0$/6

11$091

66$.44

11/$629

49$66/ 244$90

14

2$ 2 $022

-1$022

1$044

0$.1/

0$12

0$/

10$41

62$.0

110$90/

4/$0.1 20$4

1.

2$166

-1$166

1$60

0$62

0$160

0$691

9$/./

.$.41

104$1/9

44$6 216$40

16

2$11

-1$11

1$/1

0$/44

0$190

0$646

9$116

.4$694

9/$.69

41$6/2 20$0.0

1/

2$4..

-1$4..

2$11

0$6

0$220

0$602

$.00

.0$99/

91$1.6

9$02/ 19$60

1

2$600

-1$600

2$..9

0$94

0$2.1

0$.60

/$912

4/$4/1

4$99.

6$462 1/6$41

19

2$/44

-1$/44

$042

1$10

0$2

0$.21

/$..

44$12

/9$119

$99 164$.99

20

2$

-1$

$.66

1$2.

0$1.

0$44

6$2

40$9/0

/$.46

1$64 1.2$992

21

$0

-2$0

4$1

1$6

0$4

0$449

6$

$000

6$24

29$41 142$06

22

$1//

-2$1//

4$/41

1$492

0$1

0$416

.$69

.$21.

6$4

2/$14 11$/1

2

$22

-2$22

.$91

1$62

0$41.

0$.

.$4.

2$60

.$691

2.$4 122$06/

24

$466

-2$466

6$02

1$/..

0$44

0$.6

.$029

0$1/4

.4$4/

2$4/6 11$026

2.

$611

-2$611

6$1.

1$

0$42

0$29

4$6.1

2/$90.

.0$290

21$/9 104$..

26

$/..

-2$/..

/$.90

2$021

0$.16

0$0.

4$299

2.$/94

46$.09

20$116

2/

$99

-2$99

$40/

2$1.6

0$..1

0$21

$9/2

2$1

42$990

1$604

9$96

2

4$044

-$044

9$26.

2$291

0$..

0$260

$66

22$00

9$/1

1/$196

 2$ 2$.90

29

4 1

 1

10 16.

2 42/

0 620

0 240

 6

20 1/

6 60

1. /

/6 2/1

96$/1

?

= 0$2/.(8) =

D!bit un#ak hi"r*gra+, 7 = ?$A =

0$046//.1 m"!tkm2mm

14$116.6690 m"!tmm

b$ @ra+ik hi"r*gra+  Y 7 X

= 77 = Y$7 = t8

2

4$622

-$622

1$116

2$

0$/2.

0$1

2$6.9

1.$9..

2$1

12$.00

.9$946



4$/66

-$/66

14$1

2$9/6

0$/60

0$1/4

2$4.2

14$/12

26$.92

11$.

..$29

4

4$910

-$910

1.$291

$114

0$/96

0$160

2$261

1$.6

24$.21

10$6/

.0$91

.

.$0..

-4$0..

16$442

$2.

0$1

0$14

2$04

12$.01

22$606

9$0

46$999

6

.$199

-4$199

1/$64

$92

0$66

0$16

1$920

11$.20

20$6

9$042

4$1

/

.$44

-4$44

1$6

$.1

0$902

0$12.

1$/69

10$61.

19$201

$4

9$919



.$4

-4$4

20$14

$6/0

0$9

0$11.

1$60

9$//

1/$691

/$60

 6$//9

9

.$6

-4$6

21$461

$10

0$9/

0$106

1$.01

9$00/

16$29/

/$0/6

$1

40

.$///

-4$///

22$20

$9.0

1$009

0$09

1$2

$29.

1.$011

6$.19

 1$20/

$

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"an s!t!rusna>>>

Y a 

a

= 10-a((-X)2X) = 1$2 2  0$1.   0$04. = (7$8)(h$A) = =

0$46. 0$2..4./1/

 perhitungan selanjutnya lihat Tabel Perhitungan

Grafik Hidrograf Banjir HSS Snyder  .0$000

   )    k    t    "        0 00$000   m    (    7    t    i    b 2.0$000   !    D

7 akibat hujan 6 mm akibat hujan 10 mm

200$000

1.0$000

100$000

.0$000

0$000 1

2



4

.

6

/



9

10

11

12

1

14

1.

16

1/

1

19

20

21

22

Baktu t (jam)

2

24

2.

26

2/

2

29

0

1

2



4

.

6

/



9

40

41