Holter-Hammrich Area - Flood Protection and Nature Conservation, Germany

Title Holter-Hammrich Area - Flood Protection and Nature Conservation, Germany
Description
Preview image No image
Preview image caption
Creators fullname Laszlo Cseh
Contributors fullname
NWRM
Site information
Climate zone
cool temperate moist
Mean annual rainfall
0 - 300 mm
Mean rainfall unit
mm/year
Average temperature
9
Mean runoff unit
450 - 600 mm
Type
Actual Test Site
Light or indepth?
In-depth
Mean annual runoff range
150 - 300 mm
Average slope range
0%-1%
Vegetation class
Grassland
Design and implementations
Application scale
Field Scale
Installation date
2011-05
Lifespan
40
Age
3
Performance timescale
1 - 4 years
Area (ha)
223
Area subject to Land use change or Management/Practice change (ha)
223
Size
223
Size unit
ha
Design capacity
3800000
Basis of design
rainfall
Constraints
none
Favourable preconditions
natural site conditions, in particular the height variations of the area
Design contractual arrangement
No data
Design consultation activity
No data
Design land use change
No data
Design authority
Authority type Role Responsibility Name Comments
National water authority
Implementation
Martin Wendeburg
Lessons, risks, implications
Key lessons
A continuous and open discussion between all involved groups led to a high acceptance of the overall process. It was a key lesson of this measure that cooperation between different sectors (flood protection, nature conservation etc.) as well as different stakeholder groups (government agencies, NGO†™s) are able to cooperate in effective networks, when a consistency of goals is given.
Success factor(s)
Success factor type Success factor role Comments
Attitude of relevant stakeholders

Willing stakeholders a positive public perception were the major enabling factors. A continuous and open discussion between all involved groups led to a high acceptance of the overall process. The availability of financial resources and cooperation between all stakeholders led to a smooth implementation of all measures.
Communication activities
Financing
Financing type Comments
National funds
Landacquisition for the implementation of NWRMs was paid by the State of Lower Saxony.

Other measure were financed from different sources due to the various goals. NWRM unrelated constructions of dykes and technical facilities were paid from water management sources, whereas reconstructions of roads were paid by rural development funds. The cost for a specially prepared trail with nature information were covered by European funds.
Barrier
Barrier type Barrier role Comments
Other
There were no major implementation barriers, although the benefit for nature conservation aspects were doubted by nature conservation NGO†™s. It was argued that the use of the structure as a flood protection and water storage facility would counteract the habitat restoration means in extreme cases of floods. By a continuous and open discussion these uncertainties were resolved.
Driver
Driver type Driver role Comments
Organisation committed to it
main driver
The NLWKN is the Nature Protection Agency of Lower Saxony
Availability of subsidies
secondary driver
Financing share
No data
Policy, general governance
Policy description
Nutrient Pollution
Policy target
Target purpose
Improved Biodiversity
Policy pressure
No data
Policy area
No data
Policy impact
No data
Policy wider plan
Wider plan type Wider plan focus Name Comments
Lower Saxony otter protection programme
Lower Saxony wetlands protection programme
Policy requirement directive
No data
Socio economic
Direct benefits information
none
Costs investment
12600000
Costs investment information
Technical constructions
Specially prepared trail for nature information and experience
New Roads for farmers
Costs operation maintenance
N.A.
Costs total
12600000
Costs total information
see above
Information on Economic costs - income loss
Actual income loss: Lease Agreements are given out for free, due to heavy regulations for farming
Ecosystem improved biodiversity
1
Information on Ecosystem improved biodiversity
Extensification or abandonment of agricultural use and high water levels in spring support an increase of characteristic breeding birds for example. Amphibians benefit from standing water bodies.
Information on Ecosystem provisioning services
N.A.
Ecosystem impact climate regulation
No information available
Information on Ecosystem impact climate regulation
N.A.
Biophysical impacts
Information on retained water
3.8 million m3
Information on increased water storage
N.A.
Information on runoff reduction
N.A.
Water quality overall improvements
N/A info
Information on Water quality overall improvements
N.A.
Soil quality overall soil improvements
N/A info
Information on Soil quality overall soil improvements
N.A.
Monitoring maintenance
Monitoring impacts effects
0
Performance
Performance impact estimation method
Unknown
Performance impact estimation information
N.A.
Measures
sources
Nwrm type In-depth
Nwrm geolocation 7.6115,53.1982
General
National Id
Germany-01
Site name
Halter-Hommrich
Summary
This Project realized a combination of three natural water retention measures: the restoration of meadows and pastures (A1) as well as a large floodplain (N3). Furthermore reduced tillage (A7) was introduced to the area. The location of the measures was in north-west Germany within the river basin district Weser (DE4000). They were directed at national policy contexts, namely the Lower Saxony otter protection program and the Lower Saxony wetlands protection program, although they also mitigate impacts identified by the WFD. As mentioned above, the measures also served the creation of large scale floodplains. As result a wide variety of stakeholders were involved in the implementation, ranging from nature conservation agencies and water managers to local farmers. Therefore, different parts of the measures could be financed by different sources.
Apart from the main objectives of the project, it was also an important success in terms of cooperation of different stakeholders.
NUTS Code
Weser-Ems
RBD code
DE4000
Transboundary
0
Data provider
Tamer Fawzy, BEF DE
Longitude
7.6115
Latitude
53.1982
EEA core metadata
Topics
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