1 / 30

ELBE Restoration project: Spadenlander Busch / Kreetsand

ELBE Restoration project: Spadenlander Busch / Kreetsand. Dr. Annedore Seifert, Hamburg Port Authority. Changing Estuary – dynamic nature. Elbe river mouth. 1976. 2002. within 30 years, loss of 100 million m³ of sediment  more tidal energy can enter the estuary. 1.

yaron
Télécharger la présentation

ELBE Restoration project: Spadenlander Busch / Kreetsand

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. ELBERestoration project: Spadenlander Busch / Kreetsand Dr. Annedore Seifert, Hamburg Port Authority Meeting TIDE - GIP Seine-Aval, 08.06.2011 | Annedore Seifert | Hamburg Port Authority

  2. Changing Estuary – dynamic nature Elbe river mouth 1976 2002 within 30 years, loss of 100 million m³ of sediment  more tidal energy can enter the estuary Meeting TIDE - GIP Seine-Aval, 08.06.2011 | Annedore Seifert | Hamburg Port Authority 1

  3. Changing Estuary - uses Past Present Meeting TIDE - GIP Seine-Aval, 08.06.2011 | Annedore Seifert | Hamburg Port Authority

  4. Changing Estuary: tidal range Elbe Meeting TIDE - GIP Seine-Aval, 08.06.2011 | Annedore Seifert | Hamburg Port Authority

  5. Changing Estuary: tidal pumping Nachteilige Veränderung: Verlandung silting up of anabranches and embankments More sedimentation in port and fairways Meeting TIDE - GIP Seine-Aval, 08.06.2011 | Annedore Seifert | Hamburg Port Authority

  6. Restoration of the Estuary: The Tidal Elbe Concept Three main Objectives for a Future Action Plan: • Attenuation of the Tidal Energy through River Engineering in the Mouth of the Estuary, • More Space for the River (Tidal Volume) in the upper Part • Optimisation of the Sediment- management considering the whole System of the Elbe Meeting TIDE - GIP Seine-Aval, 08.06.2011 | Annedore Seifert | Hamburg Port Authority

  7. Spadenlander Busch / Kreetsand Project: Spadenlander Busch / Kreetsand Tidal Volume: New shallow water area Hamburg Meeting TIDE - GIP Seine-Aval, 08.06.2011 | Annedore Seifert | Hamburg Port Authority

  8. Project: Spadenlander Busch / Kreetsand • former spoil area / dewatering field, partially dyke foreland with alluvial forest • dyke realigned in 1999 • planning area ~ 47 ha • mean surface level +5,50 m NN Meeting TIDE - GIP Seine-Aval, 08.06.2011 | Annedore Seifert | Hamburg Port Authority

  9. Project: Spadenlander Busch / Kreetsand Tidal Volume: New shallow water area • Operational Objectives • increaseoftidalvolume • reductionoftidalrange (supporting MTLW) • reductionoftidalpumpingeffects (lessdredgingefforts) • Further Objectives • Project integrating all needsofuses (natureandwaterconservation, tidalriverdevelopment,recreationetc.) • Maintainingandimprovingthediversityofbiotopes • Enhancepublicexperience on interactionsoftidalactionsandnature • Usetheprojectfor a newcommunciationschemeoftheTidal Elbe Concept Meeting TIDE - GIP Seine-Aval, 08.06.2011 | Annedore Seifert | Hamburg Port Authority

  10. Comparison, selection and technical planning of the final version Planning process / examinated criteria Design and evaluation of the preferential alternatives Earth works planning • Soil-mechanical and –chemical examination • Removal: concept of re-useand disposal • Geotechnical analysis Hydrodynamics • 2-D-modelling • evaluation of the flow conditions • evaluation of the sedimentation processes Nature conservation • Inventory and assessment of the status quo • Definition of required compensation • Strategic environmental assessment Meeting TIDE - GIP Seine-Aval, 08.06.2011 | Annedore Seifert | Hamburg Port Authority

  11. Selectionofthepreferential versionsandmodelling Preselection of 8 different alternatives Selection of 3 preferential alternatives Meeting TIDE - GIP Seine-Aval, 08.06.2011 | Annedore Seifert | Hamburg Port Authority

  12. Modelling ofthecurrents Alternative 1 Alternative 3 Meeting TIDE - GIP Seine-Aval, 08.06.2011 | Annedore Seifert | Hamburg Port Authority

  13. Modelling ofsedimentationprocesses Alternative 1 Alternative 3 Meeting TIDE - GIP Seine-Aval, 08.06.2011 | Annedore Seifert | Hamburg Port Authority

  14. Evaluation matrixandcriteria • Rating of the alternatives by using different evaluation criteria to the topics • Target achievement • Impact on nature conservation objectives • Time line • Costs • Scoring to give more weight to extra important criteria • Attenuation of the tidal range support of MTLW • Sustainability  restriction of sedimentation • Nature  alluvial forest, biotopes • Sensitivity analyses to verify the results Meeting TIDE - GIP Seine-Aval, 08.06.2011 | Annedore Seifert | Hamburg Port Authority

  15. Selectionanddetailedplanningofthe final version Meeting TIDE - GIP Seine-Aval, 08.06.2011 | Annedore Seifert | Hamburg Port Authority

  16. TIDE: Applicationof a newcommunicationconceptat Elbe estuary: „Deichbude (dykeshed)“ Meeting TIDE - GIP Seine-Aval, 08.06.2011 | Annedore Seifert | Hamburg Port Authority

  17. Time line • Application for the planning approval: June 2010 • Public hearing: October 2010 • expected permission: end of 2011 • anticipated start of construction: end of 2011 / beginning of 2012 • The entire project will be finished end of 2014 / beginning of 2015 Meeting TIDE - GIP Seine-Aval, 08.06.2011 | Annedore Seifert | Hamburg Port Authority

  18. Meeting TIDE - GIP Seine-Aval, 08.06.2011 | Annedore Seifert | Hamburg Port Authority

  19. www.tide-project.eu www.hamburg-port-authority.de Thank you! Annedore.Seifert@hpa.hamburg.de | Hamburg Port Authority | Neuer Wandrahm 4, 20457 Hamburg, Germany

  20. Meeting TIDE - GIP Seine-Aval, 08.06.2011 | Annedore Seifert | Hamburg Port Authority

  21. Constructionprogress: • soundingandclearingofexplosives Meeting TIDE - GIP Seine-Aval, 08.06.2011 | Annedore Seifert | Hamburg Port Authority

  22. Constructionprogress: • Removalof 2 Mio. m³ in threephasesofconstruction • eachwith: • Hot Spots • otherfilled in soil • unspoiltclayandsand • Shaping Meeting TIDE - GIP Seine-Aval, 08.06.2011 | Annedore Seifert | Hamburg Port Authority

  23. Meeting TIDE - GIP Seine-Aval, 08.06.2011 | Annedore Seifert | Hamburg Port Authority

  24. Restoration of the Estuary: The Tidal Elbe Concept Three main Objectives for a Future Action Plan: • Attenuation of the Tidal Energy through River Engineering in the Mouth of the Estuary, • More Space for the River (Tidal Volume) in the upper Part • Optimisation of the Sediment- management considering the whole System of the Elbe Meeting TIDE - GIP Seine-Aval, 08.06.2011 | Annedore Seifert | Hamburg Port Authority

  25. TIDE Pilot Projects: Elbe • 1. Feasibility study: engineering measures (creation of sandbars) in the estuary mouth • Modelling of expected behavior/effects 3. Evaluation of sediment trap as part of a • sediment management scheme • Functioning and effectiveness of the new approach Depth ~ 2m Meeting TIDE - GIP Seine-Aval, 08.06.2011 | Annedore Seifert | Hamburg Port Authority

  26. In folgenden Kriterien weisen die Varianten bewertungsrelevante Unterschiede auf: • Nachhaltigkeit, einschließlich der daraus resultierenden Betriebskosten • Dämpfung • Erlebbarkeit, über potentielle Weglänge • Erzeugte Insellagen • Rückgebaute Tidegehölze • V1 dämpft signifikant besser als V2 und V3 • V3 erzeugt deutlich weniger Sedimentationen als V1 und V2 • V1 und V3 liegen in der Zielerreichung dicht beieinander • V1 und V2 liegen in den Auswirkungen dicht beieinander • Dauer und Kosten wirken sich nur unmaßgeblich auf die Auswertung aus • V1 erhält vor V2 und vor V3 in der Summe die meisten Punkte Meeting TIDE - GIP Seine-Aval, 08.06.2011 | Annedore Seifert | Hamburg Port Authority

  27. ZIELFUNKTIONEN NATURSCHUTZ • Minimierung des Eingriffes in schützenswerte Flächen bzw. Schaffung von Ersatz für rückzubauende Teilflächen des Auwaldes, der Röhrichtflächen und des Deichgrabens • Förderung einer naturnahen Dynamik und biologischen Vielfalt Weitere Zielsetzungen ERLEBBARKEIT • Wahrnehmbarkeit der Wasserflächen und -bewegung vom Deich aus !!! Meeting TIDE - GIP Seine-Aval, 08.06.2011 | Annedore Seifert | Hamburg Port Authority

  28. Aufstellung Bewertungskriterien und Auswertungsmatrix • Einstufung der Varianten nach verschiedenen Kriterien • Bildung von Bewertungsblöcken • Zielerreichung • Auswirkungen auf Schutzgüter • Termine • Kosten • Vergabe von Wichtungspunkten zur Abwägung der Kriterien • Herausarbeitung besonders wichtiger Kriterien • Dämpfung Tidehub  Stützung Tideniedrigwasser • Nachhaltigkeit  Beschränkung Sedimentation • Schutzgut Natur  Auwald, Lebensräume • Sensitivitätsanalyse zur Ergebniskontrolle Meeting TIDE - GIP Seine-Aval, 08.06.2011 | Annedore Seifert | Hamburg Port Authority

  29. Installation of the rating criteria and - matrix • Rating of the alternatives using different criteria • Creation of valuation units • target achievement • impact on subjects of protection • time line • costs • Scoring to give extra important criteria more weight • attenuation of the tidal hub subsidy of the tidal low water • Sustainability  restriction of sedimentation • nature  alluvial forest, biotopes • Sensitivity analyis to verify the results Meeting TIDE - GIP Seine-Aval, 08.06.2011 | Annedore Seifert | Hamburg Port Authority

  30. Naturschutzfachliche Aspekte BESTANDSAUFNAHME UND BEWERTUNG: • Tide-Auwald (ca. 7,5 ha) • Der Tide-Auwald stellt einen prioritären Lebensraumtyp dar • Tideröhricht (ca. 6 ha) • Die Tideröhrichtflächen sind nach § 28 HmbNatSchG geschützt • Deichnaher Graben • Der deichnahe Graben stellt einen wertvollen Biotyp dar (nicht nach § 28 HmbNatSchG geschützt) Meeting TIDE - GIP Seine-Aval, 08.06.2011 | Annedore Seifert | Hamburg Port Authority

More Related