Isar-Plan: Improving flood protection and recreational opportunities by redesigning the Isar

Wasserwirtschaftsamt München
Publicado: 21 Septiembre 2017
Última edición: 02 Octubre 2020
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Resumen

The project group “Isar-Plan” was initiated in 1995 to restore the Isar river in Munich from its artificial canal bed to a more natural shape and function in order to improve flood control, biodiversity and recreational opportunities. Construction started in 2000 and was finished in 2011 having restored 8km of river and costing 35 million euros.

Classifications

Región
Europa Occidental y del Sur
Escala de aplicación
Local
Ecosistema
Ecosistema urbano
Ecosistemas de agua dulce
Humedal urbano
Río, corriente
Tema
Actores locales
Adaptación al cambio climático
Ciudades e infraestructuras
Fragmentación del hábitat y degradación
Manejo de incendios e inundaciones
Planificaión urbana
Reducción de desastres
Restauracion
Salud y bienestar humano
Servicios ecosistémicos
Retos
Inundaciones
Objectivos de Desarrollo Sostenible
ODS 6 - Agua limpia y saneamiento
ODS 11 - Ciudades y comunidades sostenibles
ODS 13 - Acción por el clima
ODS 15 - Vida de ecosistemas terrestres
ODS 17 - Alianzas para lograr los objetivos
Metas de Aichi
Meta 2: Valores de biodiversidad integrados
Meta 15: Restauración de ecosistemas y resiliencia
Meta 19: Intercambio de información y conocimiento
Metas del marco de Sendai
Meta 4: Reducir los daños de desastres a la infraestructura crítica y los trastornos a los servicios básicos como las instalaciones educativas y de salud, incluyendo el desarrollo de su resiliencia para 2030.

Ubicación

Munich, Germany

Retos

Heavy rain events in the Alps in the years of 1999, 2005 and 2013 led to major floods and substantial financial damage in the South of Germany. Such events are likely to increase with climate change. Furthermore, balancing societal and ecological priorities as well as working to remodel the densely populated inner city to implement the river restoration plan was challenging, with disagreements over the design in certain areas as well as what was feasible within the confines of the city.

Beneficiarios

Given the improved flood protection and the quality of nearby recreational spaces, the main beneficiaries are the surrounding infrastructure, citizens and visitors to the area as well as the economy. The restoration also benefits biodiversity.

¿ Cómo interactúan los building blocks en la solución?

Strong partnerships and public engagement (building block 1) are essential for the successful implementation of the solution and a prerequisite to allow for multiple goals to be achieved through balancing trade-offs (building block 2). Finally, “learning by doing” (building block 3) allows for improved solutions.

Impactos positivos

The project successfully improved protection against flooding through developing more of a natural river landscape, which allows space for the river. Indeed, a big flood in 2005 had an effect on the whole catchment area and allowed evidence to show where the restoration had mitigated flood damage. As seen through the impacts of this massive flood in other areas of southern Germany, the restoration of the river Isar has improved flood control and reduced the damage that could have been caused.

 

The project has also benefited biodiversity through the creation of new habitats for flora and fauna and through allowing fish to move along the river where before they were impeded.

 

The hydrological status has been also improved to achieve bathing water quality. This means that Munich inhabitants and visitors can swim in the river and benefit from the attractive landscape for many recreational activities.

Historia

Wasserwirtschaftsamt München

The Isar river restoration along 8 km in the city of Munich is a spectacular achievement in its ability to accommodate both large floods that regularly impact the area and high recreational usage with up to 30,000 people gathering in the area on warm weekends, while improving biodiversity.

 

The project group “Isar-Plan” was initiated in 1995 during an investigation of the Munich flood protection systems and amidst an increasing demand for a “closer to nature” urban environment which can offer recreational opportunities. The project was headed by Munich City and the Bavarian Water Board and represents an unparalleled level of interdisciplinary cooperation. After preliminary studies in how to design a project that balanced the aims for flood protection, ecology and recreation, work started in 2000. The main channel was widened from 50m to 90m and a number of measures have been undertaken to restore the natural hydrological function, a near-natural appearance of the river, with ample habitat for flora and fauna and recreation areas, while at the same time ensuring flood protection of the surrounding area.

 

In 2003 a landscape design completion was launched with public consultation and participation for the last 1.6Km stretch in the heart of the city (that needed to take into account ecological, flood protection and recreational goals). This resulted in controversial discussions and public quarrel because two near opposing projects (an urban functional design vs a total re-naturalised design) were selected as first and second prize. Finally, in 2005, both teams collaborated to provide a compromised design that encompassed the secure flood protection needed within the constraints required by the heavily built up area and a renaturalised appearance.

 

The restoration finished in 2011.

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Wasserwirtschaftsamt München Wasserwirtschaftsamt München

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Wasserwirtschaftsamt München