WPC2 ZvH怜_N濄=[p5|LO&9YV\kbu >?OJ.'oOf?@ARTUVWDt$HP LaserJet 4L,,LL,,0(9 Z6Times New Roman RegularU(O$ԃLevel 1Level 2Level 3Level 4Level 5mailto:franic@imi.hr -#UKUS.,   _ . (  2  )   SALIGNL~{dAsub{s}(t)}over{dt}~=~(ksub{s}~+~lambda)Asub{s}(t)~+~I(t) -#UKUS.,   _Ԁ . (  1  )   0ALIGNL~I(t)~=~Isub0esup{~ksub{f}~t} I(tX) IH>0e%  k__ fm t  BdAzs(1tq)YRdt=/(koss)AKs(t )  I (O t )WPCV 5139! U * "Systemn-8"Arial- .--"Arial- .-- .-- .-- .-- .--"Arial- .-- .--"Arial- .-- .-- .-- . - "-  3f3333f333ff3fffff3f3f̙3f3333f3333333333f3333333f3f33ff3f3f3f3333f3333333f3̙333333f333ff3ffffff3f33f3ff3f3f3ffff3fffffffffff3fffffff3fff̙ffff3fffff???__ߟ߿3f3333f333ff3fffff3f3f̙3f3f3333f333ff3fffff̙̙3̙f̙̙̙3f̙3f3f3333f333ff3fffff3f3f̙3f45-- "- "-- "-- "- ----8"Arial- .-- .--8"Arial- .--"Arial- .-- .-- .-- .-- .--"Arial- .-- .--"Arial- .-- .-- .-- .-- "-Wc-- "-SSS\S\\\-"Arial- .- "-.- "-SSS- "-!0 - "-aaa- "-aaa\- "-!200 #- "-ppp- "-ppp\- "-!400 2- "-~~~- "-~~~\- "-!600 @- "-- "-\- "-!800 N- "-- "- !1000 \..--"Arial- .!Surface Deposit (Bqm-2)0_..-- ..--"Arial- .- ___"-.- "-jjS- ___"- !1963 - ___"-b0b0S0- ___"-S0S00- ___"-bZbZSZ- ___"-SZSZZ- ___"-bbS- ___"-SS- ___"-bbS- ___"-SS- "-jjS- "-SS- ___"- !1968 - ___"-bbS- ___"-SS- ___"-b)b)S)- ___"-S)S))- ___"-bRbRSR- ___"-SRSRR- ___"-b{b{S{- ___"-S{S{{- "-jjS- "-SS- ___"- !1973 - ___"-bbS- ___"-SS- ___"-bbS- ___"-SS- ___"-b!b!S!- ___"-S!S!!- ___"-bJbJSJ- ___"-SJSJJ- "-jsjsSs- "-SsSss- ___"- !1978 s- ___"-bbS- ___"-SS- ___"-bbS- ___"-SS- ___"-bbS- ___"-SS- ___"-bbS- ___"-SS- "-jBjBSB- "-SBSBB- ___"- !1983 B- ___"-blblSl- ___"-SlSll- ___"-bbS- ___"-SS- ___"-bbS- ___"-SS- ___"-bbS- ___"-SS- "-jjS- "-SS- ___"- !1988 - ___"-b:b:S:- ___"-S:S::- ___"-bdbdSd- ___"-SdSdd- ___"-bbS- ___"-SS- ___"-bbS- ___"-SS- "-jjS- "-SS- ___"- !1993 - ___"-b b S - ___"-S S  - ___"-b3b3S3- ___"-S3S33- ___"-b\b\S\- ___"-S\S\\..-- ..--- "-- "-0- "- 0- "-0Y- "-HpY- "-Ya- "- qBa- "-a- "-yJl- "-- "-- "-- "-- "-(- "- (- "-( Q- "- @ Q- "- Q{- "-!i:{- "-{C- "-4dC- "-C- "-[,- "-"- "-("- "-" - "-:  - "-  J- "- 8  J- "- J-s- "-%b3-s- "--s;- "-E\;- "-;6- "-S$6- "-6!- "-N!- "-!G- "-9 G- "-GMB- "-_00MB- "-MBHk- "-eZ6+Hk- "-HkL- "-`1TL- "-LJ- "-d5~J- "-JL- "-b3L- "-LC- "-d5C- "-CQ:- "-[),Q:- "-Q:Lc- "-iR:#Lc- "-LcM- "-d{5LM- "-MP- "-e6vP- "-PO- "-h9O- "-OP - "-g8P - "-P O2- "-h!9O2- "-O2N\- "-gJ8-ft7E-- ..}--- "-}- "-}0- "-0- "-0Y- "-Y- "-Y!- "-!- "-!- "-- "-- "-- "-- "-- "-(- "-(- "-('Q- "-'Q- "-'Q6{- "-6{- "-6{?- "-?- "-?F- "-F- "-FJ- "-J- "-JM - "-M - "-M OJ- "-OJ- "-OJQs- "-Qs- "-QsR- "-R- "-RR- "-R- "-RS- "-S- "-SS- "-S- "-SSB- "-SB- "-SBSk- "-Sk- "-SkS- "-S- "-SS- "-S- "-SS- "-S- "-SS- "-S- "-SS:- "-S:- "-S:Sc- "-Sc- "-ScS- "-S- "-SS- "-S- "-SS- "-S- "-SS - "-S - "-S S2- "-S2- "-S2S\- "---- ..--- "-- "--- ..-@`@`@--- "-X)v!Data- "-@@@--- "-!Fit0---     f  D  "     -#UKUS.,   _ X ^ Figure  1   ݀90SrannualsurfacedepositWPWin 6.0/OLE 1.0 Prefix Information MarkerWPDraw30.Drawingࡱ> 0  !"#$%&'()*+,-./23456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^Root Entry`.@p/3@Ole 7WPG20VCompObjt'F! WP 7 [0] `.@pCorel Presentations 8 Drawing Embed SourceWPDraw30.Drawing9qG GdWPCV 5139! U * "Systemn-8"Arial- .--"Arial- .-- .-- .-- .-- .--"Arial- .-- .--"Arial- .-- .-- .-- . - "-  3f3333f333ff3fffff3f3f̙3f3333f3333333333f3333333f3f33ff3f3f3f3333f3333333f3̙333333f333ff3ffffff3f33f3ff3f3f3ffff3fffffffffff3fffffff3fff̙ffff3fffff???__ߟ߿3f3333f333ff3fffff3f3f̙3f3f3333f333ff3fffff̙̙3̙f̙̙̙3f̙3f3f3333f333ff3fffff3f3f̙3f45-- "- "-- "-- "- ----8"Arial- .-- .--8"Arial- .--"Arial- .-- .-- .-- .-- .--"Arial- .-- .--"Arial- .-- .-- .-- .-- "-Wc-- "-SSS\S\\\-"Arial- .- "-.- "-SSS- "-!0 - "-aaa- "-aaa\- "-!200 #- "-ppp- "-ppp\- "-!400 2- "-~~~- "-~~~\- "-!600 @- "-- "-\- "-!800 N- "-- "- !1000 \..--"Arial- .!Surface Deposit (Bqm-2)0_..-- ..--"Arial- .- ___"-.- "-jjS- ___"- !1963 - ___"-b0b0S0- ___"-S0S00- ___"-bZbZSZ- ___"-SZSZZ- ___"-bbS- ___"-SS- ___"-bbS- ___"-SS- "-jjS- "-SS- ___"- !1968 - ___"-bbS- ___"-SS- ___"-b)b)S)- ___"-S)S))- ___"-bRbRSR- ___"-SRSRR- ___"-b{b{S{- ___"-S{S{{- "-jjS- "-SS- ___"- !1973 - ___"-bbS- ___"-SS- ___"-bbS- ___"-SS- ___"-b!b!S!- ___"-S!S!!- ___"-bJbJSJ- ___"-SJSJJ- "-jsjsSs- "-SsSss- ___"- !1978 s- ___"-bbS- ___"-SS- ___"-bbS- ___"-SS- ___"-bbS- ___"-SS- ___"-bbS- ___"-SS- "-jBjBSB- "-SBSBB- ___"- !1983 B- ___"-blblSl- ___"-SlSll- ___"-bbS- ___"-SS- ___"-bbS- ___"-SS- ___"-bbS- ___"-SS- "-jjS- "-SS- ___"- !1988 - ___"-b:b:S:- ___"-S:S::- ___"-bdbdSd- ___"-SdSdd- ___"-bbS- ___"-SS- ___"-bbS- ___"-SS- "-jjS- "-SS- ___"- !1993 - ___"-b b S - ___"-S S  - ___"-b3b3S3- ___"-S3S33- ___"-b\b\S\- ___"-S\S\\..-- ..--- "-- "-0- "- 0- "-0Y- "-HpY- "-Ya- "- qBa- "-a- "-yJl- "-- "-- "-- "-- "-(- "- (- "-( Q- "- @ Q- "- Q{- "-!i:{- "-{C- "-4dC- "-C- "-[,- "-"- "-("- "-" - "-:  - "-  J- "- 8  J- "- J-s- "-%b3-s- "--s;- "-E\;- "-;6- "-S$6- "-6!- "-N!- "-!G- "-9 G- "-GMB- "-_00MB- "-MBHk- "-eZ6+Hk- "-HkL- "-`1TL- "-LJ- "-d5~J- "-JL- "-b3L- "-LC- "-d5C- "-CQ:- "-[),Q:- "-Q:Lc- "-iR:#Lc- "-LcM- "-d{5LM- "-MP- "-e6vP- "-PO- "-h9O- "-OP - "-g8P - "-P O2- "-h!9O2- "-O2N\- "-gJ8-ft7E-- ..}--- "-}- "-}0- "-0- "-0Y- "-Y- "-Y!- "-!- "-!- "-- "-- "-- "-- "-- "-(- "-(- "-('Q- "-'Q- "-'Q6{- "-6{- "-6{?- "-?- "-?F- "-F- "-FJ- "-J- "-JM - "-M - "-M OJ- "-OJ- "-OJQs- "-Qs- "-QsR- "-R- "-RR- "-R- "-RS- "-S- "-SS- "-S- "-SSB- "-SB- "-SBSk- "-Sk- "-SkS- "-S- "-SS- "-S- "-SS- "-S- "-SS- "-S- "-SS:- "-S:- "-S:Sc- "-Sc- "-ScS- "-S- "-SS- "-S- "-SS- "-S- "-SS - "-S - "-S S2- "-S2- "-S2S\- "---- ..--- "-- "--- ..-@`@`@--- "-X)v!Data- "-@@@--- "-!Fit0---     f  D  "   BOlePartOlePres0001ZWPGExtents ~zZ =-   ~ Xz 000PPP```ppp@  @   @@@@@@``@```@@@@@@@@@@@@ @ @@ @ @ @@@@@@@@@@@@`@`@@`@`@`@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@  @   @@@@@@``@```@@@@@@  @   @@@@@@``@```@@@@@@  @   @@@@@@``@```@@@@@45     @   .  "Systemn-8"Arial- .--"Arial- .-- .-- .-- .-- .--"Arial- .-- .--"Arial- .-- .-- .-- . - "-  3f3333f333ff3fffff3f3f̙3f3333f3333333333f3333333f3f33ff3f3f3f3333f3333333f3̙333333f333ff3ffffff3f33f3ff3f3f3ffff3fffffffffff3fffffff3fff̙ffff3fffff???__ߟ߿3f3333f333ff3fffff3f3f̙3f3f3333f333ff3fffff̙̙3̙f̙̙̙3f̙3f3f3333f333ff3fffff3f3f̙3f45-- "- "-- "-- "- ----8"Arial- .-- .--8"Arial- .--"Arial- .-- .-- .-- .-- .--"Arial- .-- .--"Arial- .-- .-- .-- .-- "-Wc-- "-SSS\S\\\-"Arial- .- "-.- "-SSS- "-!0 - "-aaa- "-aaa\- "-!200 #- "-ppp- "-ppp\- "-!400 2- "-~~~- "-~~~\- "-!600 @- "-- "-\- "-!800 N- "-- "- !1000 \..--"Arial- .!Surface Deposit (Bqm-2)0_..-- ..--"Arial- .- ___"-.- "-jjS- ___"- !1963 - ___"-b0b0S0- ___"-S0S00- ___"-bZbZSZ- ___"-SZSZZ- ___"-bbS- ___"-SS- ___"-bbS- ___"-SS- "-jjS- "-SS- ___"- !1968 - ___"-bbS- ___"-SS- ___"-b)b)S)- ___"-S)S))- ___"-bRbRSR- ___"-SRSRR- ___"-b{b{S{- ___"-S{S{{- "-jjS- "-SS- ___"- !1973 - ___"-bbS- ___"-SS- ___"-bbS- ___"-SS- ___"-b!b!S!- ___"-S!S!!- ___"-bJbJSJ- ___"-SJSJJ- "-jsjsSs- "-SsSss- ___"- !1978 s- ___"-bbS- ___"-SS- ___"-bbS- ___"-SS- ___"-bbS- ___"-SS- ___"-bbS- ___"-SS- "-jBjBSB- "-SBSBB- ___"- !1983 B- ___"-blblSl- ___"-SlSll- ___"-bbS- ___"-SS- ___"-bbS- ___"-SS- ___"-bbS- ___"-SS- "-jjS- "-SS- ___"- !1988 - ___"-b:b:S:- ___"-S:S::- ___"-bdbdSd- ___"-SdSdd- ___"-bbS- ___"-SS- ___"-bbS- ___"-SS- "-jjS- "-SS- ___"- !1993 - ___"-b b S - ___"-S S  - ___"-b3b3S3- ___"-S3S33- ___"-b\b\S\- ___"-S\S\\..-- ..--- "-- "-0- "- 0- "-0Y- "-HpY- "-Ya- "- qBa- "-a- "-yJl- "-- "-- "-- "-- "-(- "- (- "-( Q- "- @ Q- "- Q{- "-!i:{- "-{C- "-4dC- "-C- "-[,- "-"- "-("- "-" - "-:  - "-  J- "- 8  J- "- J-s- "-%b3-s- "--s;- "-E\;- "-;6- "-S$6- "-6!- "-N!- "-!G- "-9 G- "-GMB- "-_00MB- "-MBHk- "-eZ6+Hk- "-HkL- "-`1TL- "-LJ- "-d5~J- "-JL- "-b3L- "-LC- "-d5C- "-CQ:- "-[),Q:- "-Q:Lc- "-iR:#Lc- "-LcM- "-d{5LM- "-MP- "-e6vP- "-PO- "-h9O- "-OP - "-g8P - "-P O2- "-h!9O2- "-O2N\- "-gJ8-ft7E-- ..}--- "-}- "-}0- "-0- "-0Y- "-Y- "-Y!- "-!- "-!- "-- "-- "-- "-- "-- "-(- "-(- "-('Q- "-'Q- "-'Q6{- "-6{- "-6{?- "-?- "-?F- "-F- "-FJ- "-J- "-JM - "-M - "-M OJ- "-OJ- "-OJQs- "-Qs- "-QsR- "-R- "-RR- "-R- "-RS- "-S- "-SS- "-S- "-SSB- "-SB- "-SBSk- "-Sk- "-SkS- "-S- "-SS- "-S- "-SS- "-S- "-SS- "-S- "-SS:- "-S:- "-S:Sc- "-Sc- "-ScS- "-S- "-SS- "-S- "-SS- "-S- "-SS - "-S - "-S S2- "-S2- "-S2S\- "---- ..--- "-- "--- ..-@`@`@--- "-X)v!Data- "-@@@--- "-!Fit0---     f  D  "       METAFILEPICT~TZ~ =-   ~ Xz 000PPP```ppp@  @   @@@@@@``@```@@@@@@@@@@@@ @ @@ @ @ @@@@@@@@@@@@`@`@@`@`@`@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@  @   @@@@@@``@```@@@@@@  @   @@@@@@``@```@@@@@@  @   @@@@@@``@```@@@@@45     @   .  "Systemn-8"Arial- .--"Arial- .-- .-- .-- .-- .--"Arial- .-- .--"Arial- .-- .-- .-- . - "-  3f3333f333ff3fffff3f3f̙3f3333f3333333333f3333333f3f33ff3f3f3f3333f3333333f3̙333333f333ff3ffffff3f33f3ff3f3f3ffff3fffffffffff3fffffff3fff̙ffff3fffff???__ߟ߿3f3333f333ff3fffff3f3f̙3f3f3333f333ff3fffff̙̙3̙f̙̙̙3f̙3f3f3333f333ff3fffff3f3f̙3f45-- "- "-- "-- "- ----8"Arial- .-- .--8"Arial- .--"Arial- .-- .-- .-- .-- .--"Arial- .-- .--"Arial- .-- .-- .-- .-- "-Wc-- "-SSS\S\\\-"Arial- .- "-.- "-SSS- "-!0 - "-aaa- "-aaa\- "-!200 #- "-ppp- "-ppp\- "-!400 2- "-~~~- "-~~~\- "-!600 @- "-- "-\- "-!800 N- "-- "- !1000 \..--"Arial- .!Surface Deposit (Bqm-2)0_..-- ..--"Arial- .- ___"-.- "-jjS- ___"- !1963 - ___"-b0b0S0- ___"-S0S00- ___"-bZbZSZ- ___"-SZSZZ- ___"-bbS- ___"-SS- ___"-bbS- ___"-SS- "-jjS- "-SS- ___"- !1968 - ___"-bbS- ___"-SS- ___"-b)b)S)- ___"-S)S))- ___"-bRbRSR- ___"-SRSRR- ___"-b{b{S{- ___"-S{S{{- "-jjS- "-SS- ___"- !1973 - ___"-bbS- ___"-SS- ___"-bbS- ___"-SS- ___"-b!b!S!- ___"-S!S!!- ___"-bJbJSJ- ___"-SJSJJ- "-jsjsSs- "-SsSss- ___"- !1978 s- ___"-bbS- ___"-SS- ___"-bbS- ___"-SS- ___"-bbS- ___"-SS- ___"-bbS- ___"-SS- "-jBjBSB- "-SBSBB- ___"- !1983 B- ___"-blblSl- ___"-SlSll- ___"-bbS- ___"-SS- ___"-bbS- ___"-SS- ___"-bbS- ___"-SS- "-jjS- "-SS- ___"- !1988 - ___"-b:b:S:- ___"-S:S::- ___"-bdbdSd- ___"-SdSdd- ___"-bbS- ___"-SS- ___"-bbS- ___"-SS- "-jjS- "-SS- ___"- !1993 - ___"-b b S - ___"-S S  - ___"-b3b3S3- ___"-S3S33- ___"-b\b\S\- ___"-S\S\\..-- ..--- "-- "-0- "- 0- "-0Y- "-HpY- "-Ya- "- qBa- "-a- "-yJl- "-- "-- "-- "-- "-(- "- (- "-( Q- "- @ Q- "- Q{- "-!i:{- "-{C- "-4dC- "-C- "-[,- "-"- "-("- "-" - "-:  - "-  J- "- 8  J- "- J-s- "-%b3-s- "--s;- "-E\;- "-;6- "-S$6- "-6!- "-N!- "-!G- "-9 G- "-GMB- "-_00MB- "-MBHk- "-eZ6+Hk- "-HkL- "-`1TL- "-LJ- "-d5~J- "-JL- "-b3L- "-LC- "-d5C- "-CQ:- "-[),Q:- "-Q:Lc- "-iR:#Lc- "-LcM- "-d{5LM- "-MP- "-e6vP- "-PO- "-h9O- "-OP - "-g8P - "-P O2- "-h!9O2- "-O2N\- "-gJ8-ft7E-- ..}--- "-}- "-}0- "-0- "-0Y- "-Y- "-Y!- "-!- "-!- "-- "-- "-- "-- "-- "-(- "-(- "-('Q- "-'Q- "-'Q6{- "-6{- "-6{?- "-?- "-?F- "-F- "-FJ- "-J- "-JM - "-M - "-M OJ- "-OJ- "-OJQs- "-Qs- "-QsR- "-R- "-RR- "-R- "-RS- "-S- "-SS- "-S- "-SSB- "-SB- "-SBSk- "-Sk- "-SkS- "-S- "-SS- "-S- "-SS- "-S- "-SS- "-S- "-SS:- "-S:- "-S:Sc- "-Sc- "-ScS- "-S- "-SS- "-S- "-SS- "-S- "-SS - "-S - "-S S2- "-S2- "-S2S\- "---- ..--- "-- "--- ..-@`@`@--- "-X)v!Data- "-@@@--- "-!Fit0---     f  D  "      [ WPC ! >=ƚ aW   "Systemn-8"Arial- .--{"Arial- .--8"Arial- .--"Arial- .-- .-- .-- .-- .--"Arial- .-- .--"Arial- .-- . - "-  3f3333f333ff3fffff3f3f̙3f3333f3333333333f3333333f3f33ff3f3f3f3333f3333333f3̙333333f333ff3ffffff3f33f3ff3f3f3ffff3fffffffffff3fffffff3fff̙ffff3fffff???__ߟ߿3f3333f333ff3fffff3f3f̙3f3f3333f333ff3fffff̙̙3̙f̙̙̙3f̙3f3f3333f333ff3fffff3f3f̙3f45-- "- "-- "-- "- ----8"Arial- .-- .--8"Arial- .--{"Arial- .--8"Arial- .--"Arial- .-- .-- .-- .-- .--"Arial- .-- .--"Arial- .-- .-- "-K-- "-GGGG-"Arial- .- "-.-- "-!0 - "-- "-G-!100 - "-- "-G-!200 w- "-- "-G-!300 n- "-- "-G-!400 e- "-- "-!500 \..--"Arial- .!Activity (TBq)lt..-- ..- "---"Arial- ..GGG   !1963666^^^!1969)))QQQzzz!1975DDDmmm!1981888```!1987+++SSS|||!1993..-- ..-- .-----^^^^>>>(bbb(>">"b"DDPDDPJJJmmymmysss]]]AAA]]A77C`7`7`C==`=n`n`nl``lnfnffKKKKKjjj%%%jj%66666DDDDDS*S*S6**6S0S00@S@S@_SS_@Y@YY{{;{;{;;*****ooooo*ppp*$$p$bFbFbRFFRbLbLL#o#o#{ o o {#u#u u)))))'''''88888@9@9@E49494E@?@?4?>b>b>n/b/b/n>h>h/hlllll    PPPPP---- -  .,.,.8,,8.2.22-- ..-- .- "-H%""JCs'Oc=fH0Y6$L'u> #?:h6F) &2!--- "-  --2--SZ3:--7c--(--_?--* --s%S--M---vV--~--X8----$--/@ --iI--q------F &--4t--7\<--(e--N.----"--3'--JO*/--Fx&X--V6-- --9--6--1B"-- ..- "-H%""J snS=kf9W0oY$Lu?h 2--- "--------------------------------------------------------------------- ..--- "-- "--- ..- "-DD--- "-, b!Data- "---- "-!Fit--- :    f     j   =-^+&OLE 2.0 Box <=8C HKKKKCCCC'dxd( $ Figure  1  bbbb'dxd&p d Pddddd'dxd&p Pd dfgfg'dxd3+0 d d d3+0 d d diiii'dxd dCCCCC'dxdC'dxd=-^+ I&mage <=8C HKKKK  -#UKUS.,   _ X ^ Figure  2   ݀90Srintheintermediatereservoir   X   oftheAdriaticSea ALIGNL~Asub{s}(t)~=~Isub{0}over{ksub{s}~+~lambda~~ksub{f}}~[esup{ksub{f}~t}~esup{(ksubs+lambda)t}]~+~Asub{s}(0)esup{(ksubs+lambda)t}d ddd(d2dssek>fyF[FeR  k__ fV t Ft Fe ] ( k__ s c  ) tF]FFA?s{F(F0;F)Fep(k__sv)t B5!UKUS.,  TRX6&X3' Letter6&A43'T   _@ c ASSESSMENTOFTHEADRIATICSEA@@cWATERMEANRESIDENCETIME  @  cUSINGFALLOUT90SrASRADIOACTIVETRACER   FRANI`Z. t InstituteforMedicalResearchandOccupationalHealth,RadiationProtectionUnitZagreb,Ksaverskacesta2,POBox291,CroatiaEmail:4F (MO  5  franic@imi.hr63MOGB  7 h u 8  Inphysicaloceanography90Srcanbeusedasradioactivetracertostudycirculationofseawater.  ` Asapartofanextendedmonitoringprogramme,90Srhasbeenanalysedinseawatersamplesand  L  falloutontheAdriaticsince1963.SamplesofsurfaceseawaterhavebeencollectedonfourlocationsoftheAdriaticSea:townsofRovinjandRijekainNorthAdriatic,townofSplitinMidAdriaticandtownofDubrovnikinSouthAdriatic.FalloutsampleshavebeencollectedmonthlyinthecityofZadar(MidAdriatic).90Sractivityconcentrationsarefoundtobeapproximately   equalonalllocationsobserved,notdifferingfromtherestoftheMediterraneanSea[1].Itwasestimatedthatapproximately85%ofallmanmaderadioactivecontaminationintheMediterraneancomesfromfallout[2].Consequently,intheAdriatic,90Sractivityconcentrations p areingoodcorrelationwiththefalloutactivity,thecoefficientofcorrelationbeing0.72[1].Theelongatedshape(some800by200km)andalmostlandlockedpositionoftheAdriaticseaplayanimportantroleindynamicsofitswater.TheAdriaticseaisthemajorsourceofthedensestwaterintheEasternMediterranean,theEasternMediterraneanDeepWater(EMDW)[3].  p MeteorologicalconditionsfavourabletodensewaterformationoccurringduringBoraevents(thedominantwinterwindblowingfromNortheast),causerapidmixingofsurfacewaterswiththeintermediatewaterlayer,whichcanthereforebeconsideredasasinglewaterreservoir(83%ofthetotalvolume).ThisisespeciallytruefortheNorthAdriaticsinceitisrelativelyshallow,thedeepnotexceeding100m.Togetherwiththesurfacewaters90Srsinkstodeeperwaterlayersand   eventually,duetothegeneralcirculationpattern,leavestheAdriatic.Assumingthatmostofthe  90SrcomesintotheAdriaticseabyfallout,the90SrcirculationintheAdriaticseacanbedescribed  bythesimplemathematicalmodel:/QUR_OKz| 7 p @Xdddddddd@E,g f7  , . ""    ""whereAs(t)0  isthetotal,timedependantWW90Sractivity(Bq)inreservoirconsistingofsurfaceand $X" intermediatewater,obtainedbymultiplyingtheobservedactivityconcentrationdatabythevolumethereservoir(29U,U000km3)%0!$"" 0  isthedecayconstantfor90Sr(y-1),&"%"" 1/ks0  isthemeanresidencetimeof90Srinareservoir(y)and'#&"" I(t)0  isthetotalannual90SrinputintotheAdriaticsea(Bqy-1).(#'"" Inordertosolvetheequation (1) severalassumptionsweremade.Itwasassumedthatthe )$( intermediatewaterenteringtheAdriaticfromtheMediterranean(Ioniansea)doesnotsignificantlycontributetototal90SrinventoryintheAdriaticduetoaslowermixingrateof l+&* surfaceandintermediatewaters.Also,itwasassumedthattheinputof90SrbythePoriveris X,'+ proportionaltothedirectfalloutinput.Therefore,thetotalinputof90SrtotheAdriaticseawas D-(, estimatedbymultiplyingtheobservedfalloutdatabytheareaoftheAdriaticsea(138V,V600km2) 0.)- andmultipliedbyfactor1.2toadjustfortherunoffcontributionformthePoriver.Finally,thefalloutdataobtainedfromthemeasurementsinthecityofZadarwereassumedtoberepresentativeforthewholeAdriaticarea.Thelongtermfalloutdatawerefittedtotheequation: 0D,0 Ї/STP_OKz|P 7 p @Xdddddddd@E,Q7F N, ""   xl6XB2.p~0  ` E   {2 x where: Io0  istheinitialinputof90Srinthe `  !"!" !"!"Adriaticseaand "  kf  isaconstant. 8    Byfittingthefalloutexperimentaldata !"!" !"!"forthe19631996period( Figure1 ),  L   !"!" !"!"forkfisobtained0.39y1andfor  8   !"!" !"!"Io=I(1963)135TBq(812Bqm2).After $   !"!" !"!"combiningequations (1) and (2) and    !"!" !"!"solvingforA(t),withinitialconditions !"!" !"!"Io=I(1963)andAs(0)=As(1963)the    !"!" !"!"followingsolutionisobtained: =/o7_OKz|3Mf p @Xdddddddd@E)f& 3+?.==/o7_OKz|M%f p @Xdddddddd@Eff=aY..       ""=>xlZnB2.p~0  ` E05  + 2 x>?>xlZnB2.p~0  ` E05  + 2 x>?A@nl0:*&`><   ` EdW   a n@ATxl02B2.p~0  ` EN  + 0[2 x ""TByfittingtheexperimentaldatatoa  theoreticallypredictedcurve (3 ),the H   unknownparameterkswascalculatedto 4   be0.2A1Ay1( Figure2 ).Althoughthe     model (3) issimplifiedrepresentationof     therealsituation,thefitisreasonably  good,thecoefficientofcorrelation  betweenexperimentalandpredicteddata  being0.92.Themeanresidencetimeof l   90Srinthereservoirconsistingofsurface X    andintermediateseawaterlayersbeing  thereciprocalvalueofkswasestimated 0"    tobeapproximately4.75years.This  valueiscomparabletotheresultof  approximately5years,obtainedby  studyingwaterflowsoftheAdriaticsea  ""waterthroughthestraitofOtranto. REFERENCES  )$( [1]0  FRANI`Z.andBAUMANA.Activityof90Srand137CsintheAdriaticSea,Health h+&* Physics, 64 :162-169;1993.T,'+"" [2]0  UnitedNationsEnvironmentProgram(UNEP).MediterraneanActionPlan.Assessment D-(, ofthestateofpollutionintheMediterraneanseabyradioactivesubstances.Athens,UNEP1991. "" [3]0  ORLI`M.,GAbI`M.andLAVIOLETTEP.E.Thecurrentsandcirculationofthe 0X+/ Adriaticsea.OceanologicaActa, 15(2) :109123;1992.