Rødsand laboratoriet et samarbejde mellem KU, Femern & DHI

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1 Rødsand laboratoriet et samarbejde mellem KU, Femern & DHI Ulrik Lumborg DHI

2 Rødsand laboratoriet I 2012 var det erkendt at Rødsand lagune ville være et fokusområde i forbindelse med etableringen af Femernforbindelsen DHI og KU havde arbejdet i området i flere omgange Femern var indstillet på fortsat at have fokus på området

3 Hvad foregår der? Langtidsmonitering af især sedimentdynamik, flora og fauna Udvikling og test af moniteringsteknikker Kurser

4 Faciliteter Hus med, værksted, lade, lille laboratorium og mulighed for overnatning Pt fire målestationer i lagunen (en bøjestation og tre måleplatforme) Gode aftaler med de lokale havne

5 Fehmarnbelt and Rødsand lagoon Fehmarnbelt is part of transition system between the North Sea and the Baltic The lagoon is protected by a spit (Hyllekrog) and two partly submerged barriers Open to the north through Guldborgsund

6 Sediments in Rødsand The bed inside the lagoon consists mainly of sand Few deeper areas with substantial amount of cohesive material Cohesive seidment in suspensions during most of the year The areas around the inlets are dynamic and in continuous remodelling

7 Biology in Rødsand The bed inside the lagoon consists mainly of sand Few deeper areas with substantial amount of cohesive material Cohesive seidment in suspensions during most of the year The areas around the inlets are dynamic and in continuous remodelling

8 Moniteringsplatforme Meteorologi Vandprøver Styreelektronik Vandkvalitetsparametre Sedimentparametre Hydrografi

9 Alt er sat op online Mulighed for løbende kontrol og kvalitetskontrol Mulighed for vandprøvetagning efter ønske

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11 Bundmateriale NS04B 245µm NS04 169µm NS04A 209 µm Meget lidt fint sediment på bunden

12 Rødsandlaboratoriet er en del af Hydralab+ Ny EU projekt med en lang række deltagere Rødsandlaboratoriet skal bl.a. bruges til test af nye sensorer undersøgelse af sedimenttransport under indflydelse af biologiske parametre Mødeaktiviteter

13 Kom og vær med Alle er inviteret til at deltage i løjerne Aftestning af sensorer Undersøgelser af særlige parametre Netværk og vidensdeling Afholdelse af kurser

14 Suspended sediment concentrations correlated to wind

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17 Grain size Grain size [mm] TSMC [mg/l] Wind

18 Flocculation Primary particles Grain size distribution In situ particles Grain size distribution

19 The sediment system contains cohesive sediment and sand with only little cohesive sediment in the bed The sediment system can respond different to similar meteorological situations

20 NTU correlations to wind Just the wind speed Wind speed and direction

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22 Main conclusion Low energy system with mixed sediments Periodically high sediment concentrations caused by a combination of sediment inflows and local redistribution Mixed sediments does complicate efforts quite a bit Light attenuation results show a correlation of increased attenuation for higher concentrations. The results also indicate that two sediment populations exist that has different effects

23 About DHI DHI are the first people you should call when you have a tough challenge to solve in a water environment. In the world of water, our knowledge is second-to-none, and we strive to make it globally accessible to clients and partners. So whether you need to save water, share it fairly, improve its quality, quantify its impact or manage its flow, we can help. Our knowledge, combined with our team s expertise and the power of our technology, hold the key to unlocking the right solution.

24 Thank you