The compensation measure ‘Tidal habitat Vorder- und Hinterwerder’ was implemented before the Water Framework Directive (WFD) came into force in 2000. Thus, it was not designed to meet WFD aims. However, the measure tackles five of six main pressures the limnic zone of the Weser estuary is affected by (Table 2).
Indicator Group |
Code |
Main pressures freshwater zone Weser |
Effect? |
Description |
-- |
- |
0 |
+ |
++ |
S.I. |
- |
Habitat loss and degradation during the last 100 years: Subtidal |
|
|
|
|
X |
Additional subtidal area was created (shallow water zone). |
S.I. |
1.1 |
Habitat loss and degradation during the last 100 years: Intertidal |
|
|
|
X |
|
Intertidal habitats were developed (e.g. reeds and mudflats). |
S.I. |
1.4/ 1.5 |
Gross change in morphology/hydrographic regime during the last about 100 years |
|
|
|
|
X |
Due to Weser deepening, many side habitats of the river including shallow water got lost. The compensation measure creates new side habitats and therefore contributes to mitigating negative effects of the gross changes in morphology/hydrographic regime. |
D.I. |
1.3 |
Land claim during the last about 100 years |
|
|
|
X |
|
By partly lowering a summer dike and increasing the tidal influence on the project area, land formerly used for agricultural purposes was given back to the river. |
D.I. |
1.7 |
Relative Sea Level Rise |
|
|
|
X |
|
Project area provides additional holding capacity. |
D.I. |
2.6 |
Capital dredging |
|
|
X |
|
|
There are no direct effects to be stated, but measure generally contributes to mitigating the negative effects of capital dredging. |