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At flood tide a complete exchange of water occurred. However the creek could not be permanently used by fish due to too low water levels during ebb tide. Therefore the downstream opening of the creek was closed in 1994, and a sill was placed in the other opening in order to prevent the complete drainage of the creek.
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Realignment Wrauster Bogen
Table of content
- 1. Measure description
- 1a. Introduction
- 1b. Objectives
- 1c. Background and side conditions
- 1d. Measure
- 1e. Expected effect
- 2. Execution of the main effectiveness criteria
- 2a. Effectiveness according to development targets of measure
- 2b. Impact on ecosystem services
- 2c. Degree of synergistic effects and conflicts according the uses
- 3. Additional evaluation criteria in view of EU environmental law
- 3a. Degree of synergistic effects and conflicts according WFD aims
- 3b. Degree of synergistic effects and conflicts according NATURA 2000 aims
- 4. Crux of the matter
- 5. Contact
- 6. References
Additional information
for this measure:
No further information available.
for this measure:
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Measure
An area of 2.2 ha was realigned at the northern shore of the Elbe estuary upstream of the City of Hamburg. The position of the dyke was changed in order to create a tidal creek of approximately 400 m length (flow through system) in combination with an island of 300*40m². The northern shore of the creek was planted with grasses and willows aiming at accelerating the succession of the vegetation.At flood tide a complete exchange of water occurred. However the creek could not be permanently used by fish due to too low water levels during ebb tide. Therefore the downstream opening of the creek was closed in 1994, and a sill was placed in the other opening in order to prevent the complete drainage of the creek.