IS 6518: Code of practice for control of sediment in reservoirs

12 Pages·1992·1.4 MB·English

by  Bureau of Indian Standards

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IS 6518 (1992): Code of practice for control of sediment in
reservoirs [WRD 10: Reservoirs and Lakes]
“!ान $ एक न’ भारत का +नम-ण”
Satyanarayan Gangaram Pitroda
““IInnvveenntt aa NNeeww IInnddiiaa UUssiinngg KKnnoowwlleeddggee””
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“Knowledge is such a treasure which cannot be stolen”

IS6518:1992
ma"fs rfFr;T;

W~~~~WZ~ti?roT~ti~T
( Qqmg;i*wJI )
Indian Standard
CODE OF PRACTICE FOR CONTROL OF
SEDIMENT IN RESERVOIRS
( First Revision )
UDC 627.81-034.7

@ BIS 1992
BUREAU OF INDIAN STANDARDS
MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG
NEW DELHI 110002

January 1992 Price Group 3
sriovreseR lanoitceS ,eettimmoC RVD 4
FOREWORD
sihT naidnI dradnatS was detpoda yb eht uaeruB fo naidnI Standards, retfa eht tfard dezilanif
yb eht sriovreseR lanoitceS eettimmoC had neeb devorppa yb eht reviR yellaV noisiviD
.licnuoC
noitatnemideS fo sriovreser is a larutan nonemonehp and is a rettam fo lativ nrecnoc rof -ots
egar stcejorp ni gniteem eht suoirav ,sdnamed ekil ,noitagirri cirtcele-ordyh ,rewop doolf
,lortnoc ,cte ecnis ti stceffa eht lufesu yticapac fo eht sriovreser desab no hcihw eht stcejorp
era detcepxe ot eb evitcudorp rof a ngised .doirep rehtruF eht tnemides noitisoped adds ot eht
secrof no serutcurts ni dams, ,syawllips .cte
ehT etar fo noitatnemides lliw dneped ylegral no eht annual tnemides daol deirrac yb eht maerts
and eht tnetxe ot hcihw eht emas lliw eb deniater ni eht .riovreser sihT ni ,nrut sdneped nopu
a rebmun fo ;srotcaf hcus as eht aera and erutan fo eht ,tnemhctac esndnal nrettap ( noitavitluc
,secitcarp ,gnizarg ,gniggol noitcurtsnoc seitivitca and noitavresnoc secitcarp ,) llafniar ,nrettap
egarots ,yticapac doirep fo egarots ni noitaler ot eht tnemides daol fo eht ,maerts elcitrap ezis
noitubirtsid ni eht dednepsus ,tnemides lennahc ,sciluardyh noitacol and ezis fo ,seciuls teltuo
,skrow noitarugifnoc fo eht ,riovreser and eht dohtem and esoprup fo sesaeler hguorht eht dam.
,eroferehT noitnetta is deriuqer ot hcae eno fo eseht srotcaf rof eht tneiciffe lortnoc fo -ides
noitatnem fo sriovreser htiw a weiv ot gnicnahne rieht lufesu .efil esuaceB fo eht detimil data
,elbaliava eht snoitadnemmocer era ylno fo lareneg .retcarahc
sihT standard was tsrif deraperp ni 1972. tI is gnieb desiver won ot etadpu its stnetnoc ni enil
htiw eht tnerruc ecneirepxe and .secitcarp ehT tnatropmi segnahc edulcni gnitaroprocni -idda
lanoit stniop ni eht ngised fo .sriovreser
roF eht esoprup fo gnidiced rehtehw a ralucitrap tnemeriuqer fo this standard is deilpmoc htiw
eht lanif ,eulav devresbo ro ,detaluclac gnisserpxe eht tluser fo a tset rof ,sisylana shall eb
dednuor ffo ni ecnadrocca htiw SI 2 : 1960 seluR‘ rof gnidnuor ffo laciremun seulav ( revised )‘.

ehT rebmun fo tnacifingis secalp deniater ni eht dednuor ffo eulav dluohs eb eht emas as that fo
eht deificeps eulav ni this standard.
SI 6518 : 1992
Indian Standard
CODE OF PRACTICE FOR CONTROL OF
SEDIMENT IN RESERVOIRS
( First Revision )
1 EPOCS )b morF eht snoitavresbo fo tnemides daol
deirrac yb eht .smaerts
1.1 sihT standard srevoc eht suoirav -igne
gnireen serusaem rof eht lortnoc fo tnemides )c morF snoitciderp no eht basis fo latot
ni .sriovreser ,noisore its ytilibatropsnart and riovreser
part .ycneiciffe
1.2 tI seod ton revoc eht lacimonorga and
yrtserof serusaem ni liated rof eht lortnoc fo 4 SDOHTEM FOR GNILLORTNOC EHT
dehsretaw noisore and eht snoitautis arising NOITATNEMIDES
tuo fo landslides, ,snoisluva ,cte ni eht -reser
.riov 4.1 erehT era lareves srotcaf devlovni ni -noc
gnillort noitatnemides ni sriovreser and yeht
2 ECNEREFER etaler ot stcepsa :no )a( ngised fo ,riovreser
)b( lortnoc fo tnemides ,wolfni )c( lortnoc yb
ehT naidnI Standards detsil ni xennA A era teltuo .skrow llA eseht stcepsa era ot eb -lumis
yrassecen stcnujda ot this standard. ylsuoenat nekat eton fo and etairporppa
sdohtem .detpoda
3 LARENEG
3.1 erehW a riovreser is egral ni nosirapmoc 4.2 ngiseD fo sriovreseR
ot eht annual ffo-nur morf eht tnemhctac aera
ehT yticapac fo sriovreser is denrevog yb a
( egral yticapac wolfni ,)oitar all eht -retaw
rebmun fo srotcaf hcihw era derevoc ni SI
enrob tnemides deirrac yb eht ffo-nur retaw
5477 ( Parts 1 ot 4 .) morF eht tniop fo weiv fo
yam eb detisoped ni eht deb fo eht .riovreser
tnemides ,noitisoped eht gniwollof stniop yam
ehT deb daol yam yllareneg tisoped gnola eht
eb nevig eud :noitaredisnoc
gewlaht ro riovreser-erp ,esruoc tub eht sus-
dednep tnemides hcihw sekat a gnol emit ot )a ehT tnemides dleiy hcihw sdneped no
elttes lliw daerps erom ylneve all revo eht eht ,lacihpargopot lacigoloeg and -oeg
riovreser .deb A small tnuoma fo tnemides lacigolohprom tes up, lacigoloroetem
tisoped ni eht riovreser yam eb devomer yb eht ,srotcaf land dnal/esu ,revoc gnitpecretni
retaw drawn ffo hguorht eciuls ,steltuo tub tanks, ;cte
hcus noitca is yllareneg .lacol
b) tnemideS yrevbed scitsiretcarahc fo eht
3.1.1 nehW eht ffo-nur fo eht tnemhctac fo lennahc ;metsys
riovreser is egral ni nosirapmoc ot eht -reser
riov yticapac ( small yticapac wolfni oitar ,) lC ehT ycneiciffe fo eht riovreser as -ides
tnem ;part
eht riovreser segrahcsid eht surplus yleerf rof
gnol ,sdoirep and ti is elbissop that a -isnoc 4 ehT oitar fo yticapac fo riovreser ot eht
elbared noitroporp fo eht tnemides ni -nepsus ;wolfni
nois yam eb passed ffo htiw eht surplus ,retaw
tub eht deb daol and a trap fo dednepsus e) noitarugifnoC fo ;riovreser
tnemides lliw eb detisoped ni eht riovreser .deb f ) dohteM fo noitarepo fo ;riovreser
3.2 ehT elbaborp etar fo noitatnemides ni yna 8 snoisivorP rof silt .noisulcxe
desoporp riovreser yam eb detamitse ni eht
gniwollof :syaw 4.2.1 ehT etar fo tnemides yreviled sesaercni
)a On eht basis fo noitatnemides ni gnitsixe htiw eht emulov fo .egrahcsid
sriovreser htiw ralimis tnemhctac -ahc
,scitsiretcar eht noitatnemides stisoped 4.2.2 ehT egatnecrep fo tnemides deppart yb
fo hcihw evah neeb deyevrus revo a a riovreser htiw a nevig eganiard aera sesaercni
yltneiciffus gnol .doirep htiw eht desaercni .yticapac nI emos sesac an
1
IS 6518 : 1992
desaercni yticapac lliw ,revewoh tluser ni 4.3.1.1 ehT gnireenigne sdohtem :edulcni
retaerg ssol fo retaw eud ot .noitaropave -woH
)a esU fo kcehc dams demrof yb gnidliub
,reve htiw eht ssergorp fo ,noitatnemides ereht
small sreirrab ro sekyd ssorca maerts
is esaerced fo egarots yticapac hcihw m nrut
.slennahc
srewol eht part ycneiciffe fo eht .riovreser
4.2.3 ehT yticapac fo eht riovreser and eht ezis kcehC-ETON smad era semitemos nwonk sa
gnittes nisab ro noitatnemides .nisab
and scitsiretcarahc fo eht riovreser and its
eganiard aera era eht tsom tnatropmi srotcaf )b ruotnoC gnidnuob and ;guihcnert
gninrevog eht annual etar fo noitalumucca fo
.tnemides lacidoireP riovreser noitatnemides )c ylluG ;gniggulp
syevrus edivorp ecnadiug no eht etar fo -ides )d knaB .noitcetorp
.noitatnem nI eht ecnesba fo devresbo data rof
eht riovreser ,denrecnoc data morf rehto 4.3.1.2 ehT cimonorga serusaem edulcni -atse
sriovreser fo ralimis yticapac and tnemhctac tnemhsilb fo evitategev ,neercs ruotnoc ,gnimraf
scitsiretcarahc yam eb .detpoda pirts gnipporc and porc .noitator
4.2.4 gnitliS sekat ecalp ton ylno ni eht daed
4.3.1.3 yrtseroF serusaem edulcni tserof -noc
egarots tub osla ni eht evil egarots ecaps ni eht
,ycnavres lortnoc no ,gnizarg ,gnirebmul
.riovreser ehT ecitcarp rof ngised fo ri~ovreser
snoitarepo and tserof serif gnola htiw -eganam
is ot esu eht devresbo dednepsus tnemides data
tnem and noitcetorp fo tserof .snoitatnalp
elbaliava morf yek 1acigoIordyh skrowten and
osla eht data elbaliava morf cihpargordyh -rus
syev fo rehto sriovreser ni eht emas .noiger 4.3.2 evitneverP serusaem ot kcehc wolfni of
sihT data eb desu ot etalumis noitatnemides tnemides otni eht riovreser edulcni noitcurtsnoc
status revo a doirep fo riovreser efil as -nem fo ssap-yb slennahc ro .stiudnoc
denoit ni SI 12182 : 1987.
4.3.3 Check Dams
4.2.5 Raising the Dam at Periodic Intervals
)a yehT pleh tserra noitadarged fo maerts
gnireenignE cimonoce sisylana fo emos -reser deb ybereht gnitserra eht epols ;eruliaf
riov stcejorp ylbaborp dluow wohs that ti is
)b yehT ecuder eht yticoIev fo maerts ,wolf
repaehc ot dliub a ylIaitnatsbus rewol dam
ybereht gnisuac eht noitisoped fo eht
,yllaitini and ot esiar ti at slavretni 1itnu its
tnemides .daol
etamitlu thgieh rof eht nevig lanigiro yticapac
os that gnol lufesu efil yam .tluser egatS -noc
kcehC dams emoceb ,yrassecen erehw eht
noitcurts osla sedivorp rewol gnippart ycneiciffe
lennahc stneidarg era peets and ereht is a yvaeh
and less noitaropave ni eht laitini stages.
wolfni fo tnemides morf eht .dehsretaw yehT
,revewoH this dohtem yam ton eb elbisaef ni
era detcurtsnoc fo lacol lairetam ekil ,htrae
all eht gnitsixe dams. reverehW this dohtem
,kcor ,rebmit .cte esehT era elbatius rof small
is ,detalpmetnoc reporp noitaredisnoc dluohs
tnemhctac gniyrav ni ezis morf 40 ot 400
eb nevig no eht htgnerts fo eht gnitsixe -adnuof
.seratceh tI is yrassecen ot edivorp small kcehc
noit rof eht desoporp etamitlu .thgieh
dams no eht yradisbus smaerts gniwolf otni eht
main smaerts sediseb eht kcehc dams ni eht
4.3 Control of Sediment Inflow
main .maerts reporP noitaredisnoc dluohs eb
erehT era ynam sdohtem rof gnillortnoc -ides nevig ot eht rebmun and noitacol fo kcehc
tnem swolfni and yeht nac eb dedivid as :rednu dams .deriuqer tI is elbareferp ot eziminim eht
thgieh fo eht kcehc dams. fI eht maerts ha, a
)a dehsretaW lios/tnemeganam noitavresnoc
peets-yrev ,epols ti is elbarised ot start htiw a
serusaem ot kcehc noitcudorp and -snart
rellams thgieh rof eht kcehc dams than yam
trop fo tnemides ni eht tnemhctac .aera
yletamitlu eb .yrassecen
)b evitneverP serusaem ot kcehc wolfni fo
tnemides otni eht .riovreser 4.3.3.1 kcehC dams yam yllareneg tsoc erom
rep tinu fo egarots than eht sriovreser yeht
4.3.1 ehT lios noitavresnoc serusaem era -ruf .tcetorp ,eroferehT ti yam ton syawla eb -issop
reht dedivid-bus as: elb ot tpoda meht as a yramirp dohtem fo
tnemides lortnoc ni wen .sriovreser ,revewoH
)a ,gnireenignE
ytilibisaef fo gnidivorp kcehc dams at a retal
)b ,ymonorgA and etad dluohs ton eb dekoolrevo elihw planning
)c .yrtseroF eht noitcetorp a-fo wen .riovreser
2
IS 6518 : 1992
43.4 Contour Bunding and Trenching 4.4.1 ‘Density Current
esehT era tnatropmi sdohtem fo gnillortnoc retaW at suoirav slevel fo a riovreser netfo
lios noisore no eht hills and gnipols lands, sniatnoc yllacidar tnereffid snoitartnecnoc fo
erehw stneidarg fo detavitlnc sdleif ro secarret dednepsus tnemides ylralucitrap gnirud and
era ,rettalf yas up ot 10 .tnecrep yB eseht retfa doolf swolf and fi all retaw-etsaw dluoc eb
sdohtem eht llih edis is split up otni small -moc nwardhtiw at esoht slevel erehw eht -artnecnoc
stnemtrap no hcihw eht niar is deniater and noit is ,tsehgih a tnacifingis tnuoma fo tnemides
ecafrus ffo-nur is deifidom htiw noitneverp fo thgim eb devomer morf eht .riovreser esuaceB
lios .noisore nI noitidda ot ruotnoc ,gnidnub a degrembus teltuo draws retaw sdrawot ti
edis gnihcnert is osla dedivorp .semitemos morf all ,snoitcerid eht lacitrev noisnemid fo
eht gninepo dluohs eb small htiw tcepser ot eht
4.3.5 ylluG-
Plugging ssenkciht fo eht reyal and eht etar fo -htiw
sihT is enod yb small kcor llif dams. esehT drawal osla dluohs eb .wol With a weiv ot
dams lliw eb evitceffe ni gnillif up eht seillug passing eht ytisned tnerruc yb seciuls that
htiw tnemides gnimoc morf eht maertspu fo thgim eb ,gnitsixe ti is yrassecen ot ecart eht
eht tnemhctac and osla tneverp rehtruf -nediw tnemevom fo ytisned stnerruc and noitavresbo
snoitats ( gnitsisnoc fo yltnenamrep derohcna
gni fo eht .yllug
stfar morf hcihw stnemerusaem dluoc eb edam
4.3.6 fo erutarepmet and ytivitcudnoc tneidarg morf
Bank Protection
eht ecafrus fo eht ekal ot eht ,mottob sediseb
sihT is deveihca yb ,gnicarret ,tnemtever gnitcelloc retaw samples at suoirav shtped ) at
gniniater walls, snoibag and spurs. tsael eno just evoba eht dam and owt ro erom
lanoitidda snoitats ni eht maertspu ( eno ni eht
4.3.7 By-Pass Canals, Tunnels and Conduits telni and eno ni eht elddim ) dluohs eb .detacol
ehT suoirav sdohtem ni this yrogetac eriuqer
4.4.2
eht noitcurtsnoc fo emos epyt fo noisrevid dam Waste-Water Release
ro riew at eht daeh fo eht riovreser basin, and
gnillortnoC eht noitatnemides yb gnillortnoc
a ,lanac lennut ro tiudnoc gnidael dnuora eht
retaw-etsaw esaeler is ylsuoivbo elbissop ylno
riovreser ot a tniop woleb eht dam erehw eht
nehw retaw nac eb ro dluohs eb .detsaw sihT
wolf yam retne-er eht main .slennahc nI hcus
dohtem is elbacilppa ylno nehw a riovreser is
sesac eht doolf swolf fo tnemides nedal retaw
fo hcus ezis that a small trap fo egral doolf
era dessap-yb ot eht maertsnwod fo eht dam.
swolf lliw llif .ti
nI emos sesac erehw yhpargopot stimrep -ffo
lennahc sriovreser nac eb .deredisnoc esehT
sriovreser lliw ylbairavni evah a yaberof and nI eht ngised fo eht dam, tnemides yam eb
kcehc dam no eht maertspu rof gnippart eht passed hguorht ro revo ti as an evitceffe dohtem
.tnemides ehT derots retaw ni eht yaberof is fo silt lortnoc yb gnicalp a seires fo steltuo at
del ot eht riovreser and eht tnemides deppart suoirav .snoitavele ehT egatnecrep fo latot
is dehsulf hguorht yb ssap-yb /tiudnoc/lennahc tnemides daol that thgim eb detceje morf eht
lennut ot eht main lennahc maertsnwod fo eht riovreser hguorht reporp etag lortnoc lliw reffid
yltaerg htiw tnereffid .snoitacol tI is elbaborp
dam.
that as hcum as 20 tnecrep fo eht tnemides
4.4 Control of Sediment Deposition wolfni dluoc eb passed hguorht ynam sriovreser
yb gnitnev hguorht steltuo dengised and -noc
ehT noitisoped fo tnemides ni a riovreser yam .dellort
eb dellortnoc ot a niatrec tnetxe yb gningised
and gnitarepo setag ro rehto steltuo ni eht dam 4.4.3
Scouring Sluicing
ni hcus a rennam as ot timrep evitceles -htiw
drawals fo retaw gnivah a rehgih than egareva sihT dohtem is tahwemos ralimis ot htob eht
tnemides .tnetnoc ehT dednepsus tnemides lortnoc fo retaw-etsaw esaeler and eht gniniard
tnetnoc fo eht retaw ni sriovreser is rehgih and gnihsulf sdohtem ( ees 4.4.2 and 4.5.3 .)
gnirud and just retfa doolf .wolf ,suhT erom ehT noitcnitsid tsgnoma meht erac eht
eht retaw detsaw at hcus ,semit eht rellams lliw :gniwollof
eb eht egatnecrep fo eht latot tnemides daol
ot elttes otni tnenamrep .stisoped erehT era )a ehT retaw-etsaw esaeler dohtem stceje
yllareneg owt :sdohtem )a( ytisned ,stnerruc and tnemides nedal doolf swolf hguorht peed
)b( retaw-etsaw ,esaeler rof gnillortnoc eht yawllips setag ro egral seciulsrednu
noitisoped and htob lliw ylirassecen tluser ni at eht etar fo egrahcsid that stneverp
ssol fo .retaw .noitatnemides
3
SI 6518 : 1992
)b eganiarD and gnihsulf dohtem sevlovni ehT noitavacxe fo tlis dna yalc hcihw
eht wols esaeler fo derots retaw morf eht etutitsnoc tsom fo eht lairetam ni regral -reser
riovreser hguorht small setag ro sevlav sriov is erom tluciffid than eht noitavacxe
making esu fo lamron ro wol wolf ot fo sand and .levarg derutxet-eniF tnemides
niartne and yrrac eht ,tnemides and tonnac eb detavacxe ylisae morf regral -reser
sriov unless ti is ylevitaler diulf ro ylevitaler
)c gniruocS gniciuls sdneped rof its -iciffe .tcapmoc
ycne no rehtie eht gniruocs noitca
detrexe yb eht neddus rush fo dednuopmi 4.5.2
Dredging
retaw rednu a~high daeh hguorht -rednu
seciuls ro no eht gniruocs noitca fo hgih sihT sevlovni eht lavomer fo stisoped morf eht
doolf egrahcsid gnimoc otni eht -reser mottob fo a riovreser and rieht ecnayevnoc ot
.riov emos rehto tniop yb lacinahcem ro ciluardyh
,snaem elihw retaw egarots is gnieb .deniatniam
4.4.3.1 gniruocS gniciuls dohtem nac eb desu gnigderD secitcarp era depuorg as:
ni eht :gniwollof
a) lacinahceM gnigderd yb ,tekcub ,reddal
a) llamS rewop dams that dneped ot a taerg ;cte
tnetxe no egadnop tub ton no ;egarots
)b noitcuS gnigderd htiw gnitaolf enilepip
b) llamS noitagirri ,sriovreser erehw ylno a and a pmup yllausu detnuom no a
small noitcarf fo eht latot annual wolf ;egarrab and
nac eb ;derots c>
nohpiS gnigderd htiw a gnitaolf epip
lC ynA riovreser ni worran ,slennahc ,segrog gnidnetxe revo eht dam ro detcennoc ot
,cte erehw retaw wastage nac eb ;dedroffa an gninepo ni eht dam and yllausu htiw
and a pmup no a .egarrab
4 nehW eht ralucitrap riovreser rednu SETON
tnemtaert is a tinu ni an detcennocretni 1 ytilacitcarP of the two ,sdohtem ,yleman _avacxe
metsys os that eht rehto sriovreser nac noit dna ,gnigderd seriuqer LO eb ylluferac _isnoc
ylppus eht retaw .dedeen dered ni yna ralucitrap case.
2 elbatiuS serusaem ot tneverp noitisoped of the
4.5 lavomeR fo tnemideS tisopeD dredged tlis ni the larutan lennahc where ti si
degrahcsid deen ot eb adopted.
ehT tsom lacitcarp snaem fo gniniatniam eht
4.5.3
egarots yticapac era esoht dengised ot tneverp Draining and Flushing
noitalumucca fo tnenamrep stisoped as eht
ehT dohtem sevlovni ylevitaler wols esaeler fo
lavomer snoitarepo era ylemertxe ,evisnepxe
all derots retaw ni a riovreser hguorht setag ro
unless eht lairetam devomer is .elbasu -erehT
sevlav detacol raen mottob fo eht dam and
,erof eht noitpmeder fo tsol egarots yb lavomer eht ecnanetniam retfaereht fo nepo steltuo rof
dluohs eb detpoda as a last .troser ehT lavomer
a retrohs ro regnol doirep gnirud hcihw lamron
fo tnemides tisoped seilpmi ni ,lareneg that eht
maerts wolf stuc otni ro detcerid against eht
stisoped era yltneiciffus detcapmoc ro -osnoc
tnemides .stisoped ,eroferehT this dohtem yam
detadil ot tca as a dilos and, ,erofereht era
eb detpoda ni doolf lortnoc .sriovreser
elbanu ot wolf gnola htiw eht .retaw ehT -omer
lav fo tnemides stisoped yam eb dehsilpmocca
4.5.4
yb a yteirav fo lacinahcem and ciluardyh ro Sluicing with Controlled Water
,sdohtem hcus as ,noitavacxe ,gnigderd -nohpis
sihT dohtem sreffid morf eht doolf gniciuls ni
,gni ,gniniard ,gnihsulf doolf ,gniciuls and
that eht dellortnoc retaw ylppus stimrep -soohc
gniciuls dedia yb hcus serusaem as ciluardyh
gni eht emit fo gniciuls erom ylsuoegatnavda
ro lacinahcem noitatiga ro blasting fo eht -ides
and that eht reraw yam eb detcerid erom
.tnem ehT detavacxe stnemides yam eb ylbatius
ylevitceffe against eht tnemides .stisoped elihW
desopsid ffo os that, eseht od ton dnif eht
eht doolf gniciuls sdneped rehtie no eht -rucco
yaw again ni eht .riovreser
ecner fo doolf ro no gnieb elba ot esaeler
yldipar all fo a ,lluf ro ylraen lluf ylppus fo
4.5.1
Excavation retaw ni eht main riovreser is .ytpme ehT
egatnavda fo this dohtem is that yllareneg erom
ehT dohtem sevlovni gniniard tsom of or lla
the water ni eht basin and gnivomer eht tnemides nac eb devomer rep tinu fo retaw
tnemides yb hand ro rewop detarepo ,levohs desu than ni doolf gniruocs ro gniniard and
enilgard reparcs ro rehto lacinahcem .snaem .gnihsulf

4
SI 6518 : 1992
4.5.5 Sluicing with Hydraulic and Mechnical morf eht riovreser erom .etelpmoc reverehW
Agitation ,gniniard gnihsulf ro gniciuls raeppa ot eb
,detnarraw eht lanoitidda esu fo ciluardyh
sdohteM that rits up, kaerb up ro evom stisoped snaem rof gnirrits up eht tnemides ,stisoped
fo a tnemides otni a maerts tnerruc gniwolf ro gnihguols meht ,ffo otni a maerts
hguorht a deniard riovreser basin ro otni a ekal gniwolf hguorht eht riovreser basin dluohs
tnerruc gnivom hguorht and tuo fo a lluf -reser eb .deredisnoc tI has, ,revewoh detimil
riov lliw dnet ot ekam eht lavomer fo tnemides .noitacilppa
ANNEX A
( Clause 2.1 )
TSIL FO DERREFER NAIDNI SDRADNATS
IS No. Title IS No. Title
5477 ( traP )1 : sdohteM rof gnixif eht -apac sdohteM rof gnixif eht -apac
1969 seitic fo sriovreser : traP 1 T;$ ( traP 4, ’
seitic fo :sriovreser traP 4
lareneG stnemeriuqer
doolF egarots
$% ( traP 2 ) : sdohteM rof gnixif eht -apac
seitic fo sriovreser : traP 2
daeD egarots 12182 : 1987 senilediuG rof noitanimreted
5477 ( traP 3 ) : sdohteM rof gnixif eht -apac fo stcelfe fo noitatnemides
1969 seitic fo sriovreser : traP 3 ni planning and ecnamrofrep
eviL egarots fo sriovreser

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