Understanding floods and risks of the last 7000 years at Lake Mondsee

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1 Understanding floods and risks of the last 7000 years at Lake Mondsee Tina Swierczynski Alfred Wegener Institut, Germany PAGES Workshop Paleofloods June 2016, Grenoble

2 Strengthening European Climate Research!!!"#$%&'$()*&+#"#,

3 @!"#$%&'!"#$%&'()*$$+%,$'-."/01%"()%2'.3(-%3(%4"#$%*$)35$(6* 7$2'(*6.8263'(%'9%.8('99%$:$(6*%9.'5%!"#$%&'()*$$%*$)35$(6* ;4'')*%'9%60$%4"*6%<===%1$".*%"6%!"#$%&'()*$$ ;4'')73*#<===%> 8/2'53(-%20"44$(-$*?'(248*3'(

4 Lake Mondsee: Geography and coring A ($#%#")'+%ABC%5%"*4 *+,'-."/0+1'2-CDEB%#5F 3'4# %GB%5 :+#157'&#2-HA<% #5F ;'+&-< ) 2-A%5 D I* ;+8=-< >?? 2-CD<%5 D I* :@/%&A-$@1+#%@&. CC%J0'.6%?'.$*%KAHLC=D%25M C%%%?'5/'*36$%?'.$%KCN%5M%

5 Lake Mondsee: Geography and coring N O.$23/36"63'(%"()%.8('99%20"."26$.3*632*%"6%!"#$%&'()*$$%!?'(:$263:$%."3(9"44% $:$(6*%3(% *855$.! 7"3(L'(L*('P% $:$(6*%3(%*/.3(-

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6 Reconstruction of runoff events from Lake Mondsee sediments G &$60')* B')%7'&#-)+#+ &32.'9"23$*%"("41*3* QL7"1%948'.$*2$(2$%KRQ7;M &"-($632%J8*2$/63S34361 J2"((3(-%$4$26.'(%532.'*2'/1%KJT&M QL7"1%)399."263'(%KQ7UM C&.#/"7'&#+$-)+#+!"#$%P"6$.%4$:$4%K&'()*$$V%C==%1.*M U3*20".-$%KJ6E%!'.$(WI,.3$*4$.%X20$V% D=%1.*M O.$23/36"63'(%KY.$5*5Z(*6$.V%C==%1.*M D%.#@/%1+$-3+#+- [ 73:$.%\."8(%K7'0.V%H==GM

7 Reconstruction of runoff events from Lake Mondsee sediments <?0.'('4'-1 4<=0 >?07&+) ;&%;#0 $6,8+)89 5(6670 $/%686(69: -&,+#%.&$/0#+0&("102344

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8 Reconstruction of runoff events from Lake Mondsee sediments B ]".:$%532.'9"23$* C25 3'#/%#+$-$+E'/.-F%#5%&-.4/%&AG."77'/-."HI$+E'/ 3*I JE4'->-67%1/@.1@4%19 3*I JE4'-K-67+1/@.1@4%19 U!L\1/$%C U!L\1/$%H [ =E=NLCEG%55 [ =EGNLHG%55 [ ;3($%*346 *3W$)V%[ J346 6' *"() *3W$) K*'.6$)M%'.-"(32 9."-5$(6* "() 9."-5$(6* "() 24"*6*

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9 Reconstruction of runoff events from Lake Mondsee U!L\1/$%C U!L\1/$%C U!L\1/$%C U!L\1/$%C U!L\1/$%H

10 Reconstruction of runoff events from Lake Mondsee sediments C=

11 Reconstruction of runoff events from Lake Mondsee sediments CC What we know: 1. Floods recorded in Lake Mondsee (based on calibration with discharge of Griesler Ache between ): a.) in proximal coring (close to the inflow): daily discharge > 40m3/s b.) in central coring sides: max. peak discharge > 80 m3/s, and more than two days > 40m3/s 2. Vb weather patterns in summer trigger heavy precipitation events and floods and large sediment transport (flood layers in cores)

12 Floods of the last 7000 years at Lake Mondsee CH

Floods of the last 7000 years at Lake Mondsee CD M(&$)#%0*#(+0)80@CJ@, DL+(&8+)$I

13 Floods of the last 7000 years at Lake Mondsee CD DL+(&8+)$I DL+(&8+)$I L,+,*80G(667? DL+(&8+)$I

14 Floods of the last 7000 years at Lake Mondsee CA H==HM%".$%.$4"6$)%6'%94'')*% 2"8*$)%S1%*'860$.41%

15 Floods of the last 7000 years at Lake Mondsee CN _(2.$"*$) `]S P$"60$. H==HM%".$%.$4"6$)%6'%94'')*% /"66$.(*a )8.3(- 6."(*363'( 2"8*$)%S1%*'860$.41% 9.'5 P".5$.%6' 2''4$.% 5$)36$.."($"(%"3.5"**$* 2435"6$

16 Conclusion CG

17 FloodRisk7000 Estimating flood damage potentials C< Aim The overall aim of FloodRisk-7000 a two-year research project started in March 2016 is to provide improved estimations on flood damage potential in Northern Austria for past, current and future climatic conditions by making use of and merging different kinds of data sets. Tasks [ Link of paleodata with meterological phenomena/cyclones [ Link damage losses with meteorological cyclones [ Calculate long term insurance premiums including paleofloods (frequences, cycles) [ Calculate maximum flood damage potentials including climate scenarios

18 Conclusion CB "?'(63('8*V%*$"*'("4%*/.3(-I*85$.%94'')%20.'('4'-1%9'.% 60$%4"*6%<===%1$".*%K5344$(3"4%"()%58463L)$2")"4% *2"4$% 94'')%:".3"S34361M " U3*63(263'(%S$6P$$(%94'')*%"()%4'2"4%)$S.3*%94'P* " c3-0$.%94'')%"263:361%)8.3(-%2435"6$%6."(*36363'(*v%s86% 4'P$*6%)8.3(-%P".5$*6%"()%2'4)$*6%2435"6$%2'()363'(*

19 Conclusion &'')') ".%&A # S'+#5'/2-_5/.':$) 20"."26$.3W"63'( '9 94'') /.'($ P$"60$..$-35$* 3(%&'()*$$IT"*6$.(%X4/* # :$%7+#'2-7$-3'("4 94'')%:".3"S34361%"()%01).'4'-32"4%2'(6."*6*%3(% T8.'/$%$*/$23"441%)8.3(-%2'4)$*6%2435"6$%2'()363'(*%'9%60$%!3664$%_2$% X-$b # 9.'5%!"#$%&'()*$$V%$E-E%8(2$.6"3(63$*%3(%)"63(-%'9%*$)35$(6*%"()% 94'')%4"1$.*V%8*3(-%248*6$.*V%/'3(6*%'9%20"(-$*%$62E

20 Thank you for your attention!

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