B.COM Unit – 4 ( CORPORATE SOCIAL RESPONSIBILITY ( CSR ).pptx
Ng pres antwerpen 08122010
1. - - - - Alternative Dredging „Mud Conditioning“ Case Study Emden Surveying Problems and the Physical Behaviour of Fluid Mud Offer new Dredging Strategies Workshop Antwerpen, 08.12.2010 Norbert Greiser GREISER AND PARTNER Dredging Applications
2. Agenda - - Determination and Maintaining Nautical Depth 1. Surveying Problems 2. Additional Measuring Technology 3. Fluid Mud 4. Mud Conditioning Aussenhafen Emden (open basin to River Ems) GREISER AND PARTNER Dredging Applications
3. 1. Surveying Problems - - Proof of Nautical Depth by Echosounding Which echosounding layer represents the nautical depth ? GREISER AND PARTNER Dredging Applications
4. 1. Surveying Problems - - Proof of Nautical Depth by Echosounding GREISER AND PARTNER Dredging Applications
5. 1. Surveying Problems - - Proof of Nautical Depth by Echosounding GREISER AND PARTNER Dredging Applications
6. 1. Surveying Problems - - Multi Frequency-Echosounding is needed for Sediment Layer Detection 210 kHz 33 kHz Still open Question: Layer Consistency? ? ? GREISER AND PARTNER Dredging Applications
7. Agenda - - Determination of Nautical Depth 1. Surveying Problems 2. Additional Measuring Technology 3. Fluid Mud 4. Mud Conditioning Density / Stiffness Limits for Safe Navigation ? GREISER AND PARTNER Dredging Applications
8. 2. Additional Measuring Technology - - Vertical Profiling Probes are Required Vertical Extension of Navigable Layer(s) ? Determination of Nautical Depth GREISER AND PARTNER Dredging Applications
9. 2. Additional Measuring Technology - - Vertical Profiling Example: Nautical Depth Extension 4,5 m 8,0 m GREISER AND PARTNER Dredging Applications
10. Agenda - - 1. Surveying Problems 2. Additional Measuring Technology 3. Fluid Mud 4. Mud Conditioning Origin and Stability of Fluid Mud GREISER AND PARTNER Dredging Applications
11. - - 3. Fluid Mud Progressive Aggregation SPM from River Weser Fluorescence Dye FITC Origin: Clay-Microbes Assemblages /Stability: Sticky EPS GREISER AND PARTNER Dredging Applications
12. - - 3. Fluid Mud SEM Preparation Acroleine fixed EPS SPM from River Ems Origin: Clay-Microbes Assemblages /Stability: Sticky EPS GREISER AND PARTNER Dredging Applications
13. - - 3. Fluid Mud SEM - Preparation Bakteria Cell with EPS - Filaments SPM from River Elbe Origin: Clay-Microbes Assemblages /Stability: Sticky EPS GREISER AND PARTNER Dredging Applications
17. 4. Sediment Conditioning Since 1990 a new iteration, “ Active Nautical Depth”, objective to keep fluid mud entrained in situ by occasional mixing without ever carrying any material away. Need for “mixing” creates the “Active” component of keeping mud navigable. Artificial Liquefaction Maintaining Nautical Depth by KSN GREISER AND PARTNER Dredging Applications
18. 4. Sediment Conditioning Throughout 5 years, maintenance dredging needs at Emden reduced to zero, staff from 110 to 4, and costs from € 12.5 million to €2 million/yr. Formerly maintenance dredging and disposal need was 4 million m ³/yr. Important aim is to maintain a “neutral” sediment budget (neither long-term gain or loss of mud). “ Conditioning”, ie. not just re-fluidising mud but also re-oxygenating it in the open hopper. Artificial Liquefaction Maintaining Nautical Depth by KSN GREISER AND PARTNER Dredging Applications
19. Agenda - - 1. Surveying Problems 2. Additional Measuring Technology 3. Fluid Mud 4. Mud Conditioning Thanks for Your Attention ! Maintaining Nautical Depth by KSN GREISER AND PARTNER Dredging Applications
23. - - 4. Sediment Conditioning Port of Rotterdam Conditioning Trials Botlek Harbour (2x) Petroleumhaven 2e GREISER AND PARTNER Dredging Applications
24. - - 4. Sediment Conditioning Port of Rotterdam Conditioning Trials Botlek Harbour GREISER AND PARTNER Dredging Applications
25. - - 4. Sediment Conditioning Port of Rotterdam Conditioning Trials Conditioning Area 183.315 m 2 4 3 3 7 0 GREISER AND PARTNER Dredging Applications
26. - - 4. Sediment Conditioning 400 kHz Multibeam Chart Dredging Tracks before Conditioning GREISER AND PARTNER Dredging Applications
27. - - 4. Sediment Conditioning 400 kHz Multibeam Chart Dredging Tracks after Conditioning Main Sedimentation Area of the Relocated Silt GREISER AND PARTNER Dredging Applications
28. - - 4. Sediment Conditioning Dual Frequency Pre- and Post-Dredging Charts GREISER AND PARTNER Dredging Applications Location of the Profile Left end Right end
29. - - 4. Sediment Conditioning Dual Frequency Pre- and Post -Dredging Charts GREISER AND PARTNER Dredging Applications Depth (m) 210 kc-Layer 15 kc-Layer Distance (m) 0.7 m
30. - - 4. Sediment Conditioning Dual Frequency Pre- and Post-Dredging Charts GREISER AND PARTNER Dredging Applications Depth (m) 210 kc-Layer 15 kc-Layer Distance (m) 1.5 m