1. General information
Location and description of the intervention
City or FUA
Essen
Region
Europe
Native title of the NBS intervention
Emscher-Renaturierung
Short description of the intervention
The river Emscher is the symbol of one of the internationally most renowned industrial regions: the Ruhr area with its 5 million inhabitants and an important location of key industries such as steel, chemical, and materials industry. The revitalisation of the Emscher over the last 20 years marks a new phase in the region‘s history and is an impressive example of ecological and socio-economic transformation affecting all aspects of life along the river (Ref. 1).
Address

Germany

Area boundary
POINT (7.2299566161597 51.563107634162)
POINT (6.8393718982714 51.496394523189)
POINT (6.8394122290198 51.484778611284)
POINT (7.2299250479374 51.556815231855)
NBS area image
Source of NBS area image
Google Earth Pro (October 27, 2020). Coordinates offer a rough approximation of extent of NBS.
Type of area before implementation of the NBS
Timeline of intervention
Start date of the intervention (planning process)
pre-1990
Start date of intervention (implementation process)
2005
End date of the intervention
2020
Present stage of the intervention
Please specify "other" stage of the intervention
Several restoration projects have been completed, and the projects will continue until
the year 2020. The first 20 km of the river have been completely re-naturalised, 140 km
of trunk sewers out 400 km have been completed and the required eight wastewater
treatment plants are fully operational (5).
Goals of the intervention
1. A central goal of the Emscher Park project was to clean up the Emscher River, which runs through the very middle of the green plan and stretches a distance of 70 kilometers from east to west through the region. For decades, the river had a reputation of being a biologically dead "open sewer," acting as a waste water canal since the end of the late 19th century (Ref. 2).
2. To prevent abandonment and dereliction of many steel works (Ref. 2)
3. To improve employment situation of the area (Ref. 2)
4. To give the region a greener image (Ref. 2)
5. To improve living conditions of the local population (Ref. 4)
6. To increase biodiversity in the area (Ref. 7)
Quantitative targets
Unknown
Monitoring indicators defined
1. Number of species increased (Ref. 7)
2. Water quality (Ref. 2)
3. Amount of investment to the area (Ref. 2)
Climate change adaptation: What were the goals of the NBS?
Climate change adaptation: What activities are implemented to realize the conservation goals and targets?
What types of restoration goals are / were defined for the NBS intervention?
What activities are implemented to realize the restoration goals and targets?
Implementation activities
Now that much of the mining in the region has ceased, underground sewers have been installed to carry waste away from the river and promote its re-naturalization. Additionally, the river has been re-profiled to allow for better flooding management and, to slow the speed of the currents, part of the river's course has been changed from a straight narrow concrete channel back to a wide curved pool. Trees and native plants have been introduced along the bank, which has improved the water quality as well as the ecosystems in the area (Ref. 2).
NBS domain and interventions
Ecological domain(s) where the NBS intervention(s) is/are implemented
Grey infrastructure featuring greens
Riverbank/Lakeside greens
Green playgrounds and school grounds
Parks and urban forests
Large urban parks or forests
Blue infrastructure
Rivers/streams/canals/estuaries
Green areas for water management
Sustainable urban drainage systems
What is the level of innovation / development of the NBS related to water management?
Vegetation Type
Please specify how many trees were planted
Unknown
Amenities offered by the NBS
Services
Expected ecosystem services delivered
Provisioning services
Water (surface and ground water for drinking and non-drinking purposes)
Regulating services
Flood regulation
Water purification / filtration
Habitat and supporting services
Habitats for species
Maintenance of genetic diversity
Cultural services
Aesthetic appreciation
Inspiration for culture, art and design
Recreation
Scale
Spatial scale
Meso-scale: Regional, metropolitan and urban level
Beneficiaries
Governance
Non-government actors
Non-governmental organisation (NGO) / Civil society / Churches
Citizens or community groups
Please specify the roles of the specific government and non-government actor groups involved in the initiative
The restoration of the Emscher River was initiated by the Emscher Genossenschaft (Ref. 5). The Emscher region has set an example for civic participation in regional planning. The Emscher – Zukunft (future) is a strategic master plan for regional development that has been developed through an intensive dialogue process involving a wide range of stakeholders and effective public participation. This process has enabled many of the Emscher cities to conceptualize a family-friendly, multi-generational living environment (Seltmann, 2007) (Ref. 5).
Key actors - initiating organization
Key actors - Other stakeholders involved (besides initiating actors)
National government
Regional government
Local government/municipality
Non-government organisation/civil society
Citizens or community group
Policy drivers
NBS intervention implemented in response to an Regional Directive/Strategy
Yes
Please specify the "Regional Directive/Strategy"
EU Water Framework Directive (Ref. 5) is an operational tool, which sets the objectives for water protection in Europe.
NBS intervention implemented in response to a national regulations/strategy/plan
Yes
Please specify the national regulations/strategy/plan
1. Regional development strategy by the Ministry of Urban Development, Housing, and Transport in Nord Rhein- Westphalia (1989). One of the key components of this strategy was to bring an International Building Exhibition (International Bauausstellung - IBA) to the region. The IBA initiative was designed to instigate integrated development and regeneration in the region, with architectural competitions playing an important role. Thus it implied that the re-development considered not only economic and job creation factors, but also criteria such as society, the environment, and culture. This initiative was later termed as IBA Emscher Park (Ref. 5).
2. “Future Convention for Stormwater in the Emscher Catchment” (Ref. 5). See comments.
NBS intervention implemented in response to a local regulation/strategy/plan
Unknown
Mandatory or voluntary intervention
Mandatory (based on policy)
Intervention is mandatory
Enablers
Presence of specific city-level GI/NBS vision/strategy/plan - mentioned in connection to the project
Yes
Please specify
Green Infrastructure Ruhr - a strategy for the integrated and sustainable development of the cities and urban landscapes in the agglomeration led by The Ruhr Regional Association (RVR) (Ref. 3).
Presence of specific city-level GI/NBS section/part in a more general plan - mentioned in connection to the project
Yes
Please specify the general plan with GI/NBS section
In the face of this abandonment and decay, the State Government of NorthRhine-Westphalia created a regional redevelopment plan entitled the "International Building Exhibition (IBA) at Emscher Park" in 1989. Over the course of a ten year period, IBA Emscher Park was to encourage the ecological, economic, and urban revitalization of the Ruhr Valley and the Emscher River through several collaborative partnerships with various agencies and, notably, 17 local authorities of the Ruhr district (Ref. 2).
If there is a relevant strategy or plan, please specify the theme / type of the plan.
Presence of city network or regional partnerships focused on NBS - mentioned in connection to the project
Yes
Please specify
1. The Ruhr Regional Association (RVR), with its offices in Essen, is the regional hub of the 11 independent municipalities and four districts of the Ruhr Metropolis with its 5,1 million inhabitants. The Association is responsible for the regional planning for the Ruhr region. It maintains and preserves green open spaces for recreation and leisure, the regional business and tourism development, as well as public relations for the Ruhr Metropolis (Ref. 3).
2. The founding of the Emscher-Freunde association is based on the conviction that the Emscher region needs a wide range of support in order to develop and exploit the existing and future potential of the region for the benefit of the people living here (Ref. 4).
3.The Emschergenossenschaft is a self-governed joining of all users of water - mainly industry and communities - in the natural catchment of the river Emscher, Germany, a tributary of the river Rhine between Cologne and the Netherlands (Ref. 6).
Presence of GI / NBS research project - mentioned in connection to the project
Yes
Please specify
The Emscher Region - the opportunities of economic transition for leapfrogging urban water management. A case study investigating the background of and the drivers for, sustainable urban water management in the Emscher Region (Ref. 5).
Subsidies/investment for GI / NBS in the city - mentioned in connection to the project
Yes
Please specify
Funding for Emscher Park was derived from a variety of sources. The State Government of NorthRhine-Westphalia allocated 17,9 million EUR for IBA but much of the invested money, in fact, came from developers, private companies, non-profit groups and local town governments that worked specifically on individual projects connected to the park (Ref. 2).
Co-finance for NBS
Yes
Co-financing governance arrangements
Unknown
Was this co-governance arrangement already in place, or was it set up specifically for this NBS?
Financing
What is/was the Cost/Budget (EUR) of the NBS or green infrastructure elements?
4 400 000 000 EUR (Ref. 2)
What are the total amount of expected annual maintenance costs?
Unknown
What is the expected annual maintenance costs of the NBS or GI elements?
Unknown
Please specify cost savings
Unknown
Please specify total cost (EUR)
Altogether, the process of river regeneration has required an investment of 4.4 billion Euros (Ref. 2)
Non-financial contribution
Unknown
Which of the involved actors was motivated by this model?
Please specify technological innovation
The Emschergenossenschaft is acknowledged for its pioneering efforts in introducing sustainable stormwater management practices in the cities of the region (Seltmann, 2007).
Please specify social innovation
It has also been influential in initiating the ’Future Convention on Stormwater’, which has been ratified by 17 municipalities in the region.
Please specify novelty level of the innovation
By signing the ’Future Convention on Stormwater’, the 17 municipalities have voluntarily committed themselves to disconnect 15% of the region’s impervious area from sewer connection within 15 years while proceeding with the river regeneration (Seltmann, 2007).
Please specify Replicability/Transferability
"The paper also includes lessons learned from the Emscher Region that can be transposed to other cities depending on the local context. These relate to: (1) the restoration of an ecologically dead river; (2) the socio-economic restructuring of a
region using water as a central theme; and (3) a regional mayors’ convention on stormwater management." (Ref. 5).
Impacts, benefits
Description of environmental benefits
Environmental quality:
-Improved waste management: "First steps include rebuilding superannuated sewer canals and many decentralized sewer treatment plants to ensure that all waste water is effectively and properly cleaned before it reaches the river Emscher" (Ref. 10).

Water management and blue areas:
-Improved water quality/Increased protection against flooding/Improved stormwater management: 20 streams of the Emscher system rehabilitated (Ref. 7). The quality of sand substrate in the rehabilitated areas improved (Ref. 7). The streams have been colonized by about 400 species of invertebrates (mainly mollusks, crustaceans, oligochaetes and aquatic insects) and variety of fish species increasing biodiversity in the area (Ref. 7). Some rare species appeared in the coastal areas that indicates the overall improvement in the environmental conditions of the Emscher area (Ref. 7). The monitoring program for the Emscher includes water quantity, water quality, biological indicators and morphological structure (Ref. 7).

Green space and habitat:
-Increased green space area: "the promotion of measures that serve the protection and care of nature and the restoration of habitats of flora and fauna" (Ref. 4).
-Increased conservation or restoration of ecosystems (local habitats for local species)/Reduction of biodiversity loss: The streams have been colonized by about 400 species of invertebrates (mainly mollusks, crustaceans, oligochaetes and aquatic insects) and variety of fish species increasing biodiversity in the area (Ref. 7). Some rare species appeared in the coastal areas that indicates the overall improvement in the environmental conditions of the Emscher area (Ref. 7).
-Restoration of derelict areas: The project addressed the region's "...industrial past, with derelict factories,
a degraded landscape and polluted waters" (Ref. 5).
Description of economic benefits
-Increase of jobs: Investment in this NBS in the region was intended to improve the employment situation of the area (Ref. 2).
-More sustainable tourism: "transformed into a self-contained local recreation area with walkways, bike paths and public green spaces that will attract both people in the region and tourists" (Ref. 1).
Description of social and cultural benefits
Social justice and cohesion
-Improvement of livability: "the promotion of projects and plans for future initiatives that serve to improve people's quality of life" (Ref. 4).
-Improved social cohesion/Increased opportunities for social interaction: "promoting dialogue between social groups, the promotion of measures that develop solutions for social and societal problems, the implementation of events for the above-mentioned purposes" (Ref. 4).
-Improved access to urban green space: "transformed into a self-contained local recreation area with walkways,
bike paths and public green spaces that will attract both people in the region and tourists" (Ref. 1).
-Increased involvement of locals in the management of green spaces: An aim of the Emscher Friends Association is the promotion of civic engagement (Ref. 4).

Health and wellbeing:
-Gain in activities for recreation and exercise: "Over the past ten years, the municipal action programme, “Essen New ways to the water” has created 150 km of footpaths and cycle paths between the Emscher Valley in the north and the Ruhr Valley in the south, which have eliminated the urban separation of north and south in the Essen municipal area" (Ref. 9).

Cultural heritage and sense of place:
-Promotion of cultural diversity: "promoting dialogue between social groups, the promotion of measures that develop solutions for social and societal problems, the implementation of events for the above-mentioned purposes" (Ref. 4).

Education:
-Increased knowledge of locals about local nature: "As well as being a recreational asset, the converted Emscher is also adding new educational value. Along its ecologically improved waterways, schools are joining ‘Bach (creek) Partnerships’" (Ref. 1).
Type of reported impacts
Indicators
1. Number of species increased (Ref. 7)
2. Water quality (Ref. 2)
3. Amount of investment to the area (Ref. 2)
Analysis of specific impact categories
Job creation: The NBS created ...
Environmental justice: The implementation of the NBS project resulted in ...
Negative impacts: Did the project cause any problems or concerns?
No information was found regarding negative impacts of the project
COVID-19 pandemic
No specific information available as of October 27, 2020.
Methods of impact monitoring
Evidence for use of assessment
Presence of an assessment, evaluation and/or monitoring process
Yes
Presence of indicators used in reporting
No evidence in public records
Presence of monitoring/evaluation reports
No evidence in public records
Availability of a web-based monitoring tool
No evidence in public records
Impact assessment mechanism
Name of any specific impact assessment tools
Ecologic carried out comparative evaluation of the development of urban wastewater systems against the background of the implementation of the Water Framework Directive and this project was included in the analysis as well.
Use of GIS in mapping impacts
No evidence in public records
Citizen involvement
Citizens involvement in assessment/evaluation
Unknown
Citizens involvement in the analysis of the assessment/evaluation
Unknown
Follow-up to the evaluation / assessment
Unknown
References
Documents relevant to the intervention
Attachment Size
5070_emscher_3.pdf (4.38 MB) 4.38 MB
List of references
1. Wuppertal Institut für Klima, Umwelt, Energie GmbH (n.d.). Emscher 3.0 (Document attached).
2. Danish Architecture Centre (2014). EMSCHER PARK: FROM DERELICTION TO SCENIC LANDSCAPES. Available at: http://www.dac.dk/en/dac-cities/sustainable-cities/all-cases/green-city/emscher-park-from-dereliction-to-scenic-landscapes/ (Website not available in 2020).
3. (2016). Regionalverband Ruhr (RVR). Available at: https://www.rvr.ruhr/politik-regionalverband/ueber-uns/(Accessed: October 27, 2020).
4. Emscher Freunde (n.d.). Der Gründung des Vereins Emscher-Freunde. Available at: https://www.emscherfreunde.eu/Content.aspx?pageID=77&mid=46&sid=193 (Accessed: October 27, 2020).
5. Salian, Prit and Anton, Barabara (n.d.). The Emscher Region - the opportunities of economic transition for leapfrogging urban water management A case study investigating the background of and the drivers for, sustainable urban water management in the Emscher Region. Available at: http://www.switchurbanwater.eu/outputs/pdfs/W6-1_CEMS_DEM_D6.1.6_Case_study_-_Emscher.pdf (Accessed: October 27, 2020).
6. Unknown author (n.d.). Emschergenossenschaft (EG), Essen (Germany). Available at: http://apuss.insa-lyon.fr/eg.html (Website not available in 2020).
7. Boon, Philip and Raven, Paul (2012). River Conservation and Management. Available at: https://books.google.hu/books?id=QB3JEWO0ETQC&pg=PA243&lpg=PA243&dq=ecological+restoration+of+the+Emscher+River+essen&source=bl&ots=aUoSpoC27x&sig=1dZNGl1hiY_mIZHcEjwvMBFnoc8&hl=ru&sa=X&ved=0ahUKEwiKvZTm9ZXVAhXBIJoKHbG2A7sQ6AEISDAE#v=onepage&q=ecological%20restoration%20of%20the%20Emscher%20River%20essen&f=false (Accessed: October 27, 2020).
8. Emscher landscape park (n.d.). Emschergenossenschaft. Available at: https://climate-adapt.eea.europa.eu/metadata/case-studies/a-flood-and-heat-proof-green-emscher-valley-germany/11305605.pdf (Accessed: October 27, 2020).
9. Sustain Europe (2017). The European Green Capital – Essen 2017 creates harmony between urban life and greenery. Available at: https://www.sustaineurope.com/essen-european-green-capital-2017-29062017.html (Accessed: October 27, 2020).
10. Northern Architecture (2020). Restoration of Emscher river Ruhr Valley. Available at: https://www.northernarchitecture.us/water-management/restoration-of-emscher-river-ruhr-valley.html (Accessed: October 27, 2020).
Comments and notes
Comments
4/Enablers/partnerships: On 31st October 2005, the mayors of all 17 towns and cities of the Emscher catchment, their departmental heads, the Emschergenossenschaft and the Minister of The environment of North Rhine-Westphalia signed a “Future Convention for Stormwater in the Emscher Catchment”. With this document, the partners committed themselves to disconnect 15 % of catchment run-off into their respective sewer systems within the next 15 years. The ‘15/15 convention’ is not a binding contract but a voluntary declaration of intent of setting a common goal of river regeneration (Ref. 5).
Public Images
Image
Restoration of the Emscher River
Restoration of the Emscher River
Photographer: Ilias Abawi, retrieved 08/29/2018