State Office for Water Management Munich
The Isar -Plan Project in Munich Great (Un) expectations.
European River Restoration Conference Session 5- Enhancement of Multi-Use Landscapes 11-13 September 2013 State Office for Water Management Munich
The Isar-Plan Project: Basic Facts
Approximate length of the project= 8 km
Planning start 1995
Construction start 2000
Project completed 2011
Successful cooperation between the Free State of Bavaria and the City of Munich Approximate costs= 35 Mio. €
High public acceptance and (ab)use
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Content of this Presentation
Highlights of the Isar-Plan Project
Diversity of land use
Multiple uses of the Isar through the Isar-Plan
Unexpected issues encountered during the project
N. Mahida 3 27.06.2012 State Office for Water Management Munich The River Isar in Munich
The project area= 8km. Total area of the river in the city= 14Km
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Catchment area 9000 km²
Isar River Sections Length 270 km
1 Upper Isar (alpine Character) Medium Low Discharge 40 m³/s
2 Isar in Munich (urban character) Medium discharge 90 m³/s
3 Middle Isar (alluvial forest) Medium high discharge 420 m³/s 4 Lower Isar High discharge (100 a) 1.100 m³/s 5 Danube
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Improving dyke security without affecting tree stands
Modelling of a river section in a 1:20 model scale
Landscape architecture competition
UV treatment of water from sewage treatment plants
Special method (hydrosaat) for planting saplings
Removal of barriers for fish (weir replacement)
Follow-up monitoring of ecological revitalistion
Stakeholder Involvement and consultation
Information system for the public
N. Mahida 6 27.06.2012 State Office for Water Management Munich Multiple uses of the Isar through the Isar- Plan
Ecological protection zones &
monitoring Recreation & tourist attraction
Hydropower
Cooling of power plant
Improvement of micro-climate
Stormwater drainage
Canalisation
Flood retention
Social impacts
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Issues with diversity of land-use
Adaptation of land-use to land demand (for example for recreation, ecological value, public needs) Historical and cultural value preservation Urban use versus ecological protection Management of different interest groups
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Unexpected Issues with the Isar-Plan Project
Conflicting objectives of various stakeholders
Contractual deals
Timing of public participation
Liability issues in case of standing surf wave and potential accidents
Land and water ownership
Free and public goods are not valued
Rule enforcement
Awareness is lacking (eg. waste management)
Cultural and commercial activities are becoming more popular which potentially affect biodiversity
N. Mahida 9 27.06.2012 State Office for Water Management Munich Thank you for your attention !
Website: http://www.wwa-m.bayern.de/index.htm
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Extra Slides- if needed
N. Mahida 11 27.06.2012 State Office for Water Management Munich Historical Floods in Munich
Historical Events
HQ 1940 = 1.440 m³/s
HQ 1999 = 854 m³/s
(above) - Destruction of the Ludwigsbrücke in HQ 2005 = 1050 m³/s 1813
(right)- Floods of August 2005
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The Isar in Munich in 1905- an Artists Impression
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The Isar at the same location in 1930
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The Isar in November 2001
N. Mahida 15 27.06.2012 State Office for Water Management Munich A Balancing Act of the 3 Main Project Goals
The baseline reference situation at the Flaucher Flood protection
Near-natural ecological
restoration Recreation & leisure
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New island
Gravel banks
Dyke reinforcement The Isar-Plan Project
The baseline situation (Flaucher)
Widened river bank
Rock ramps replace sill beams
Stone-blocks for seating
Species-rich flowering meadows
Start- Großhesselohe Bridge
N. Mahida 17 27.06.2012 State Office for Water Management Munich Two spatial zones of the Isar-Plan: Urban and Semi-urban The Semi-Urban River Character •Focus on biodiversity and rare species •Flood protection •Wide bed and gravel banks •Optimising land-use
N. Mahida 18 27.06.2012 State Office for Water Management Munich Two spatial zones of the Isar-Plan: Urban and Semi-urban The Urban River Character •Optimising land-use for recreation purposes •Flood protection for densely urbanised areas •Improving attractiveness for visitors
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Dyke Reinforcement
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Flood Protection Measures
1) Widening the river bed from 50m- 90m 2) Increase in dyke height (freeboard) 3) Silt deposition removed to the flood meadows 4) Near natural design of the banks
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Stakeholder Involvement
Prior to 1990 Isar restoration
planning was largely isolated; Interesting cooperation between
government and city/municipal planners and NGO‘s and public groups; Mediation process to assist
identification of the optimal solution for the last 1.5 km of the urban Isar
N. Mahida 23 27.06.2012 State Office for Water Management Munich Sill beams on the river bed pose a barrier for fish Before After
N. Mahida 24 27.06.2012 State Office for Water Management Munich Before Sloping concrete river banks
Flattened stony river banks After
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Before: Monotonous River Landscape
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After : Diversified Bank Structures
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Before- A concrete channelized water course
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After- more structural variety and diversity
N. Mahida 29 27.06.2012 State Office for Water Management Munich Recreation and Leisure at the Isar River
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