Project part-financed by the European Union (European Regional Development Fund)

The Interreg IVB North Sea Region Programme


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Management measures analysis and comparison

Table of content

Authors:

by S. Saathoff, J. Knüppel, S. Manson & A. Boerema



10d. List of collected measure examples from Weser, Elbe, Humber and Scheldt with indication of development targets

Table 51: List of measure examples collected, analysed and compared with indication of short title, status, measure category and development targets
No. Estuary Measure example Short title Status Development Targets
Hydrology/Morphology Biology/Ecology Physical/Chemical Quality
planned implemented Measure to reduce tidal energy, tidal range, tidal asymmetry and tidal pumping effects Measure for flood protection Measure to improve morphological conditions Measure to decrease the need for dredging Measure to develop and/or to protect specific habitats Measure to develop and/or protect specific species Other measure to develop natural gradients and processes, transition and connection Measure to prevent introduction of or to fight invasive species Measure to reduce pollutant loading (point and diffuse sources) Measure to reduce nutrient loading (point and diffuse sources) Measure to improve oxygen conditions Measure to reduce physical loading (e.g. heat input by cooling water entries) Other measure to improve self-purifying power Other development target(s).
01 Elbe Spadenlander Busch/Kreetsand Spadenlander Busch   x x   x   x   x              
02 Elbe Underwater relocation area ‚Medemrinne Ost‘ Medemrinne Ost x   x   x x                    
03 Elbe Current deflection wall ´Köhlfleet´ Current deflection wall   x     x x                    
04 Elbe Study on ´Investigation on freshwater current direction control at Bunthaus and possible impact on sedimentation patterns in the Port of Hamburg´ Bunthaus   x     x x                    
05 Elbe Sediment-Trap near Wedel Sediment trap Wedel   x     x x                    
06 Elbe Compensation channel ‘Hahnöfer Nebenelbe’ Hahnöfer Nebenelbe   x         x           x      
07 Elbe Realignment Wrauster Bogen Wrauster Bogen   x         x   x              
08 Elbe Compensation measure Hahnöfer Sand (2002) Hahnöfer Sand   x         x x x              
09 Elbe Spadenlander Spitze Spadenlander Spitze   x         x x x              
10 Elbe Settlement of reed at the harbour location´Haken´ Reed settlement Haken   x         x                  
11 Elbe Land treatment of dredged material including MEchanical Treatment and Dewatering of HArbour-sediments (METHA) METHA   x                 x          
12 Elbe Managing the ´Reiherstieg´ sluice to improve oxygen conditions Managing Reiherstieg sluice x                       x      
13 Scheldt Lippenbroek - flood control area with controlled reduced tide (FCA-CRT) Lippenbroek   x   x     x                 x
14 Scheldt Groynes at Waarde Groynes Waarde   x         x                 x
15 Scheldt Ketenisse wetland - small scale tidal wetland restoration in the brackish part of the estuary Ketenisse wetland   x         x   x             x
16 Scheldt Paddebeek wetland- small scale tidal wetland restoration in the freshwater zone of the Seascheldt Paddebeek wetland   x         x   x             x
17 Scheldt Paardenschor- small scale brackish tidal wetland restoration in the Seascheldt Paardenschoor wetland   x         x   x             x
18 Scheldt Heusden LO -small scale tidal wetland restoration in the freshwater zone of the Seascheldt Heusden LO wetland   x         x   x             x
19 Scheldt Schelde pilot project 2: Relocation of dredged sediment to deep areas of the navigation channel Sediment relocation Ketelplaat   x x                          
20 Scheldt TIDE pilot: Relocation of dredged sediment to a shallow water area at the edge of the Walsoorden sandbar (2004) Walsoorden 2004   x     x   x                  
21 Scheldt TIDE pilot: Relocation of dredged sediment to a shallow water area at the edge of the Walsoorden sandbar (2006) Walsoorden 2006   x     x   x                  
22 Scheldt TIDE pilot: Relocation of dredged sediment to four shallow water areas at the edge of sandbars (2010) Sandbars 2010   x     x   x                 x
23 Scheldt Vispaaiplaats – Fish spawning pond Fish pond   x         x x                
24 Weser Tegeler Plate- Development of tidally influenced brackish water habitats Tegeler Plate   x         x   x              
25 Weser Shallow water area Rönnebecker Sand Rönnebecker Sand   x         x                  
26 Weser Tidal habitat Vorder- und Hinterwerder Vorder- und Hinterwerder   x         x   x              
27 Weser Shallow water area Kleinensieler Plate Kleinensieler Plate   x         x   x              
28 Weser Cappel-Süder-Neufeld Cappel-Süder-Neufeld   x         x x                
29 Weser TIDE pilot: Restoration of a dike foreland in Werderland – Feasibility study Werderland x   x       x   x              
30 Humber Alkborough Managed Realignment and flood storage – Creation of ~440 a of intertidal habitat Alkborough   x   x     x                  
31 Humber Paull Holme Strays Managed Realignment – creation of ~80 ha of intertidal habitat Paull Holme Strays   x         x                  
32 Humber Hydromotion MudBug – determine the density of ‘fluid’ mud to determine the depth of the navigable channel (1250 kg/m³) MudBug   x       x                    
33 Humber Creation of ~13 ha of intertidal habitat at Chowder Ness Chowder Ness   x         x x               x
34 Humber Creation of ~54 ha of intertidal habitat at Welwick Welwick   x         x x                
35 Humber Kilnsea Wetlands Klinsea Wetlands   x         x x                
36 Humber South Humber Gateway Roosting Mitigation South Humber Gateway Roosting x             x                
37 Humber Training walls at Trent falls Trent falls   x x     x                    
38 Humber Donna Nook and Skeffling Donna Nook and Skeffling x     x   x x                  
39 Humber Turnstall Realignment Turnstall Realignment x     x   x x                  



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10c. Templates for evaluation of measures in terms of Natura 2000 aims: Conservation objectives for relevant operational areas based 10e. Assignment of collected measure examples from Weser, Elbe, Humber and Scheldt to measure categories

Important to know

Reports / Measures / Tools

Report: Management measures analysis and comparison


Management issues

How and by which management measures can tidal amplification be reduced?
How can public acceptance for management actions be increased?
How can the Ecosystem Services Approach be used to support management decisions?
How can we assure accessibility to an inland estuarine port without affecting the habitats and safety against flooding?
How can we prevent excessive degradation or loss of tidal marshes?
How does habitat management affect the supply of ecosystem services?
What are the key areas of conflicts or synergies in TIDE estuaries?
What are the restoration opportunities for side branch systems and river banks (e.g. left side branch Weser)?
What factors determine the distribution of suspended sediments in an estuary?
What measures are successful for the dissipation of tidal energy?
What monitoring is required to support and assess management decisions?
What parameters should be used to define and evaluate measure targets?
What tool is available to help manage multiple users of a resource in an integrated way (i.e. achieving more holistic management)?
Which aspects do I have to take into account in order to make a measure a success?
Which measures are suitable to achieve specific ecological targets?
Which measures are suitable to achieve specific morphological and hydrological targets?
Which measures are suitable to identify, protect or develop valuable submerged habitats e.g. mussel beds and Sabellaria reefs?
Which measures are suitable to improve the physical characteristics and chemical water quality?
Which measures are suitable to provide ecosystem services and benefits?
Which synergistic effects and conflicts can be expected by planning and implementing a certain measure?
“Working with nature”: What are the opportunities for sediment management in estuaries?