Abstract:
Mos tNatura lrive ricadic sar capproximatel ybalance dwit hrespec tt osedimen tinllo wan doutllow .
Da meonstruetio ndramatieall >alter sthi sbalance ,creatin ga nimpounde drive rreac hcharaeteri/.e db y
e.xtremel )lo wHow\eloeit \an deirieien tsedimen ttrapping .Th eimpotinde dreac hwil laccumulat e
sedimen tan dlos estorag eeapaeits-unti labalanc eisagai nachieved ,whic hwoul dnormall yoccu ralte r
th eimpedimen thasbecom efillet lu pwit hsedimen tan dca nn olonge rjirovid ewate rstorag ean dothe r
henefit .
Theactua llocatio nan dmanne riifdepositio nofsedimen talon gth ereservoi rbeddepen do nfactor slik e
th elongitudina lslop eofth corigina lslreamhed .th eshap eofth creservoir ,th eparticl esi/e-distrihutio n
oflh cincomin gsediments ,th eminera leharaeteristie softh cclay-siz esediments ,th echemistr yofth c
water ,operatio npla nan doutllo weharaeteristie softh creservoir .Ihesedimen taccumulatio ni nadditio n
•t oth elos so fstorag eeaiiaeil )ofth creservoii -adversel safl'eet sth efunctionin gol'th ereservoi routlets ,
recreationa lfacilitie san dimportan tinstallation si nth ebackwate rregions ,ii'any .
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i
^Nowaday si nth eda mprojects ,th emai nproble misestimatin gth esedimen tloa dlikel yt odeposi ti nth e
'reservoir san dpredictin gth esedimen tdisti-ibutio npattern si nthei rlif etim ei norde rt oll xth esil l
elevatio no lth eoutlet so rth enewzer olevels .
Sedimen tloa dl o(iomil ereser\-oi rfro mit swalershe disdelermiiie dusin gKlJSI.f TMode lan dth e
a
resul tdeviate sonl ybyd.79"'()fro mth eestimate dsedimen tdeposit sb ybathymetri csurve yan dals oth e
sedimen tloa dt o(iomit creservoi risestimate dbyUSI.f iequatio nan ditisdeviate db y66.23 %fro mth e
estimate dsedimen tdeposit sbyhathynietri esurve yan ditshow stha tth el\USI.L 2mode lismore
applicabl etha nth eLSI. Lequation sfo reslimatio nofsedimen tyield sofGomit creservoir .
Th ene wzer oelevatio no fGomit ereservoi risdetermine db yLmpiriea larea-reductio nmethod ,
limpirica larea-incremen tmetho dan dMathematica ltw odimensiona lmodel s((Xliil-2 D)an dwhe nw c
compar eth ercsidl swil hth enewzer oelevalio nesliiiKilei-lfro mhalhymeti-i esurve yf'.mpiriea lai'eaivdiiLlioi iinellr^i ,IMi|ii;-k:i!.iieaoii ^ieiiieii linelhi' Jand((ilffl )mode ldeviate sb\O.dOiii.I.lO m
an d((.v-^inres|veli\el\ .An ditallow sliia lih enewzer oleve ldetermine dh_ vih eihre emelhod sisnot
highl ydeviate dfi-omlii ene wzer oelevation silelermine dfro mbtithymelri esurvey .Hutrelativel y
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CCHE2DmodelismoreapplicabletoestimatethenewzeroelevationofGomitereservoirsthanthe
empiricalmethodsandalsowhenwecomparethetwoEmpiricalformulasrelativelyfornewzero
elevationdeterminationEmpiricalArea-ReductionmethodismoreapplicablethantheEmpiricalAreaIncrementmethodforGomitereservoirs.
