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1Axel Netzband
30 years Dredged Material Management in the Port of Hamburg
2
Natural Suspended Matter Transport in the North Sea
Source: Kappenberg (2007)
from ICONA, 1992; Eisma and Irion, 1988
Hamburg
North Sea
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Need for Water Depth Maintenance
Sedimentation rates up to several meters / year
4
Disposal in the 1960‘s
METHA – Treatment since 1993
1993: Investment 70 Mio. Euro | Annual expenditure 15 Mio. Euro
Throughput 1.000.000 m³ per year
6
Mechanical treatment …
Hydrocyclones….
…. Band filter press
… and Land Disposal
Beneficial use of treated sediments
Dyke construction
Harbour Basin Backfilling
… have shown: These options are very limited!
Large scale tests...
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Open Water Placement
Buoy E3
Nesssand
10
E L
Dewatering
METHAJV
Feldhofe
Francop
Land TreatmentRelocation
Today‘s Dredged Material Management Concept
~ 3 Million m³ cost effective dependancy
max. 1 Million m³ costly limited
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Mercury in fresh Sediments (mg/kg TS)
Research started METHA into operation
12
River Basin Sediment Management
The Elbe:
Length 1,100 km
Population 25 Million
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Tidal Elbe Organotin
Havel Organotin, Zn
Schwarze Elster HCH; Cd, Zn, Hg
Czech RepublicDDX, HCB, PCB, TBT, PAK, Haloether, Cd, Zn, Hg
MuldeOrganotin, HCH, HCB, Dioxin/Furan, Cd, As, Zn, Hg, Cu, Pb
SaaleOrganotin, PCB, PAH, HCB, Pentachlorbenzene, Pb, Cd, Zn, Hg, CuDioxin/Furan
Source: „Hintergrundpapier zur Ableitung der überregionalen Bewirtschaftungsziele für die Oberflächengewässer
im deutschen Teil der Flussgebietseinheit Elbe für den Belastungsschwerpunkt Schadstoffe,“ FGG Elbe 2009
Elbe Watershed Contamination Sources
Remediation of most significant contaminated sites
Sou
rce:
Ran
k 20
02
Sources = Burdens of the past.
River Basin Sediment Management = Task for the International Elbe River Community.
EC Water Framework Directive = Legal tool for source control.
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Pillars of Tidal Elbe Management
River Engineering- and Sediment Management Concept
RIVER ENGINEERING
Construction of shallow areas for tidal volume
Win-win with flood protection and climate change adaptation
OPTIMIZATION of RELOCATION
Relocation of fresh sediments
Flexible, adaptive approach
Sediment traps to concentrate sedimentation
ELBE REMEDIATION
International Elbe Sediment Management Concept
Hamburg supports upstream measures
LAND DISPOSAL UNTIL 2025
Third disposal site in Hamburg
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Thank you for your attention!
Axel Netzband | Hamburg Port Authority Neuer Wandrahm 4 | D - 20457 Hamburg+49.40.42847-2791 | [email protected]
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Pilot ProjectKreetsand / Spadenländer Busch