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7/24/2019 Tri Diah Lutfiyani

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DRAINASE PERKOTAAN



DRAINASE

Menurut Dr. Ir. Suriin! M.En". #2004$%& 'raina(e)e)unyai arti )en"a*ir+an! )en"ura(!)e),uan"! atau )en"a*ih+an air.

Draina(e yaitu (uatu -ara e),uan"an +e*e,ihan

air yan" ti'a+ 'iin"in+an a'a (uatu 'aerah! (erta-ara-ara enan"""u*an"an a+i,at yan" 'iti),u*+an/*eh +e*e,ihan air ter(e,ut. #Suhar'/n/ 1481&



Tuuan 'i,an"unnya ra(arana(a*uran 'raina(e er+/taan

• )ena)in +e(ehatan 'an +e(eahteraan)a(yara+at.

• )e*in'un"i a*a) 'an *in"+un"an (eerti tanah!+ua*ita( u'ara 'an +ua*ita( air.

• )en"hi'ari ,ahaya! +eru(a+an )ateri*! +eru"ian'an ,e,an,e,an *ain yan" 'i(e,a,+an /*eha)u+an *i)a(an ,anir.

• )e)er,ai+i +ua*ita( *in"+un"an

• +/n(era(i (u),er 'aya air



un"(i 'ari 'raina(eer+/taan

• )en"erin"+an 'aerah ,e-e+ 'an "enan"an air

• )en"en'a*i+an a+u)u*a(i *i)a(an air huan yan",er*e,ihan

• )en"en'a*i+an er/(i! +eru(a+an a*an 'an

,an"unan,an"unan.



Sistem jaringandrainase perkotan• Si(te) Draina(e May/r

• Si(te) Draina(e Mi+r/



SISTEM DRAINASE

• SAL5RAN TERSIER

• SAL5RAN SEK5NDER

• SAL5RAN PRIMER

• 6ADAN AIR



Bentuk Penampang SaluranDrainase



(a*uran 'raina(e air huan 'ianur+an ena)an"nya ,er,entu+(a*uran ter(u(un. Pena)an" (a*uran (eten"ah *in"+aran'ihara+an ,er7un"(i )en"a*ir+an 'e,it *e,ih +e-i* 'ari 'e,it ren-ana

ataui 'e,it a+i,at huan harian )a+(i)u) ratarata.



Tahapan dalam peencanaandimensi saluran drainase

1. Ana*i(a a+tu K/n(entra(i

a. In*et ti)e #t0&

t/ 9 :;!% < L#t0&1!1:; < D0!38: #)enit&

•.

Di)anaL#t0& ara+ titi+ terauh 'ari 'aerah hu*u (a)ai titi+

yan" 'itinau

D ,e'a tin""ititi+ e*ea(i terauh'en"an e*ea(i titi+yan" 'itinau



• 5ntu+ 'aerah en"a*iran =300 ) )en""una+anru)u(

t/ 9

• 5ntu+ 'aerah en"a*iran 300 = L = 1000)en""una+an ru)u(

• Di)ana

• > K/ef(ien Pen"a*iran• L/ Panan" Li)a(an

• S/ Ke)irin"an ?a*an

•



Menurut Ru)u( Ker,y #1:&

L400)

Di)ana

• L ?ara+ titi+ terauh +e in*et #)&

• n' +/ef(ien (etara 'en"an +e+a(aran

• i +e)irin"an )e'an

•



,. >/n'uit ti)e #t'&

Di)ana

• t' -/n'uit ti)e

• L Panan" (un"ai

• B Ke-eatan )ini)u) a*iran (un"ai

• Sehin""a Ca+tu +/n(entra(i 'aat 'i ru)u(+an'en"an er(a)aan

t-9t0t'

Di)ana

• t- Ca+tu +/n(entra(i

• t0 in*et ti)e

• t' -/n'uit ti)e

•



2. Ana*i(a Inten(ita( uan

5ntu+ )en"ana*i(a inten(ita( huan 'i "una+aner(a)aan M/n/n/,e ya+ni

Di)ana

• I Inten(ita( uan #))Fa)&

• R24 tin""i huan )a+(i)u) 'a*a) 24 a) #))&

• t Ca+tu huan #a)&

•



3. Ana*i(a K/ef(ien Pen"a*iran F run /G

Di)ana

• > +/ef(ien run /G

• A1 *ua( area +e (atu

• A2 *ua( area +e 'ua

• An *ua( area +e n

• H1 +/ef(ien run /G area +e (atu

• H2 +/ef(ien run /G area +e 'ua

• H3 +/ef(ien run /G area +e n

• A *ua( area +e(e*uruhan

Per(a)aan *ain yan" 'aat 'i"una+an) untu+ )rn"hitun" +/ef(ien run

/G a'a*ah

• > +/ef(ien run /G

• >i K/ef(ien en"a*iran untu+ ,a"ian 'aerah yan" 'itinau 'en"an (atu eni( er)u+aan

•

Ai*ua( ,a"ian 'aerah

•



4. Ana*(ia De,it Ren-ana

Di)ana

• 'e,it #)3F'eti+&

• > +/ef(ien en"a*iran

• I intn(ita( huan

• A Lua( Area

•



:. Perhitun"an Ke-eatanSa*uran

tipe saluran

Variasi

Kecepatan

(m/detik)

Bentuk bulat, buis beton

Bentuk Persegi, pasangan

batu kali

Bentuk Trapesium, tanpa

pengerasan

0!%: J 3!0

1!0 J 3!0

1!; J 1!:



Perhitungan DimensiSalurana Dimensi saluran berpenampang persegi

5ntu+ (a*uran ,erena)an" er(e"i! 'i)en(inya 'aat'iren-ana+an 'en"an er(a)aaner(a)aan 'i,aCah ini

A 9 , < h

P 9 , 2h

T 9 ,

Di)ana

A Lua( ena)an" (a*uran #)2&

, Le,ar 'a(ar (a*uran

htin""i (a*uranP Ke*i*in" ena)a)n" ,a(ah #)&

R ?ariari hi'r/*i( #)&

T Le,ar ata( (a*uran #)&

•



b Dimensi saluran berpenampang trape!ium

5ntu+ (a*uran ,erena)an" traeiu)! 'i)en(inya 'aat'iren-ana+an 'en"an er(a)aan 'i,aCah ini

A 9 #, #).h&&h

P 9 , 2h)21

T 9 , 2)h

Ni*ai , 'an h a'a er(a)aan 'iata( 'i a),i* ,er'a(ar+a(u)(i 'ari +e,utuhan eren-anaan. Aa ,i*a ,entu+'i)en(inya te*ah +ita er/*eh )a+a +ita )en"hitun" ni*ai 'e,ityan" ,era'a 'i (a*uran 'en"an )en""una+an er(a)aan

?i+a ni*ai 'e,it 'i(a*uran *e,ih ,e(ar 'ari ni*ai 'e,it yan"'iren-ana+an )a+a 'i)en(i yan" +ita ren-ana+an (u'ah ,enar!a+an tetai i+a ni*ai 'e,it 'i(a*uran *e,ih +e-i* 'ari 'e,it yan"'iren-ana+an! )a+a +ita haru( )en"hu*an" erhitun"an'i)en(i (a*uran 'en"an a(u)(i ni*ai , 'an h yan" ,aru.

•



• "ontoh Soal

Ren-ana+an (a*uran 'raina(e 'aerah 'en"an*ua( )a(in")a(in" 100)

2! 400)2! 200)2. K/ef(ien

run /G 0.88 'an inten(ita( 10))Fa).Sa*uran

'iren-ana+an a+an 'i,uat 'ari ,et/n. ?aCa,



#$itung besarn%adebitA 9 #1000 400 2000& 9 3400 )2 9 0!0034 +)2

> 9 0!88

I 9 10 ))Fa)

9 1F3!; < >.I.A

9 1F3!; < 0!88 < 10 < 0!0034

9 0!1%% )3F'eti+



& Penentuan dimensi saluran

Penentuan 'i)en(i 'iaCa*i 'en"an enentuan,ahan

• Sa*uran 'iren-ana+an 'i,uat 'ari ,et/n 'en"an+e-eatan a*iran yan" 'iiin+an 1!:0 )F'eti+

#Ta,e*&• 6entu+ ena)an" (e"i e)at

• Ke)irin"an (a*uran )e)anan" yan" 'iiin+an (a)ai 'en"an %!: #Ta,e* :&

•

An"+a +e+a(aran er)u+aan (a*uran Mannin"#'ari Ta,e* 10& n 9 0!013

' T k k l



' Tentukan kecepatan saluran(V ) kecepatan ijin dan

kemiringan saluran (is)• V 9 1!3 )F'eti+ # = V iin 9 1!:0 )F'eti+ &

• is9 3 #'i(e(uai+an 'en"an +e)irin"an)e)anan" a*an! i(&

Den"an 'i)en(i h 90!:) )a+a R 9 FP 9 #h<,&F

#2h,& 9 0!:,F#1,&Dari er(a)aan 'i'aat



Tentukan tinggi jagaan

?a'i "a),ar 'i)en(i (a*uran 'raina(e er)u+aan



+e(i)u*an

Draina(e er+/taan ,er7un"(i untu+ )e),uan"+e*e,ihan air a'a (uatu +/ta 'en"an -ara)en"a*ir+annya )e*a*ui er)u+aan tanah #(ur7a-e'raina"e& atau *eCat 'i ,aCah er)u+aan tanah

#(u, (ur7a-e 'raina"e& untu+ 'i ,uan" +e (un"ai!*aut atau 'anau.

Tahaan enentuan 'i)en(i (a*uran 'raina(ea'a*ah )enentu+an ,e(arnya 'e,it! enentuan

,ahan! ,entu+ ena)an"! +e)irin"an (a*uran!an"+a +e+a(aran )annin"! +e-eata) (a*uran!tin""i a"aan.



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