Case study:Isar-Plan

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Location: 48° 8' 5.64" N, 11° 35' 20.04" E

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Project overview

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Status	Complete
Project web site
Themes	Hydromorphology, Monitoring, Spatial planning
Country	Germany
Main contact forename	Nick
Main contact surname	Elbourne
Main contact user ID	User:NickRRC
Contact organisation	Bayerisches Landesamt für Umwelt
Contact organisation web site
Partner organisations
Parent multi-site project
This is a parent project encompassing the following projects	No

Straightened Isar (left) and restored diversified channel (Right)

Project summary

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Monitoring surveys and results

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Lessons learnt

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Catchment and subcatchment

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(affects all case studies in this subcatchment)

Catchment

River basin district	Danube
River basin	Isar

Subcatchment

River name	Isar
Area category	1000 - 10000 km²
Area (km2)	90009,000 km² <br />900,000 ha <br />
Maximum altitude category	1000 - 2000 m
Maximum altitude (m)
Dominant geology	Siliceous
Ecoregion	Central Highlands
Dominant land cover	Alluvial Forest Vegetation
Waterbody ID

Site

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Name	Munich
WFD water body codes	DE16_147237_173317
WFD (national) typology	Type 4 "gravel and stone embossed flow of the Alpine foothills"
WFD water body name
Pre-project morphology	Straight, Revetments, Embanked, Impounded
Reference morphology	Braided, High width:depth
Desired post project morphology
Heavily modified water body
National/international site designation
Local/regional site designations
Protected species present
Invasive species present
Species of interest
Dominant hydrology	Quick run-off
Dominant substrate	Gravel
River corridor land use	Urban
Average bankfull channel width category	10 - 50 m
Average bankfull channel width (m)
Average bankfull channel depth category
Average bankfull channel depth (m)
Mean discharge category
Mean annual discharge (m3/s)
Average channel gradient category
Average channel gradient
Average unit stream power (W/m2)

Project background

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Reach length directly affected (m)	8000 m8 km <br />800,000 cm <br />
Project started	1998/01/01
Works started
Works completed	2006/01/01
Project completed
Total cost category	more than 10000 k€
Total cost (k€)	3500 k€3,500,000 € <br />
Benefit to cost ratio
Funding sources	City of Munich, Free state of Bavaria

Cost for project phases

Phase	cost category	cost exact (k€)	Lead organisation	Contact forename	Contact surname
Investigation and design			Bayerisches Landesamt für Umwelt
Stakeholder engagement and communication			Bayerisches Landesamt für Umwelt
Works and works supervision		28000 k€28,000,000 € <br />
Post-project management and maintenance
Monitoring

Reasons for river restoration

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Mitigation of a pressure	Riparian development
Hydromorphology	Structure & condition of riparian zones, Continuity of sediment transport
Biology
Physico-chemical
Other reasons for the project	Landscape enhancement, Recreation

Measures

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Structural measures
Bank/bed modifications	Gravel banks introduced, Re-grading of banks, Removal of bank protection at several sites
Floodplain / River corridor	Large scale planting, Widening of flood corridor
Planform / Channel pattern	Channel widening, Creation of willow island, Creation of braided channel, Allow future natural channel changes to occur
Other
Non-structural measures
Management interventions
Social measures (incl. engagement)
Other

Monitoring

Hydromorphological quality elements

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quality elements

Element	When monitored		Type of monitoring		Control site used	Result
	Before measures	After measures	Qualitative	Quantitative
Structure & condition of riparian zones		Yes	Yes			Improvement
Continuity of sediment transport		Yes	Yes			Improvement

Biological quality elements

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quality elements

Element	When monitored		Type of monitoring		Control site used	Result
	Before measures	After measures	Qualitative	Quantitative

Physico-chemical quality elements

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quality elements

Element	When monitored		Type of monitoring		Control site used	Result
	Before measures	After measures	Qualitative	Quantitative

Any other monitoring, e.g. social, economic

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Element	When monitored		Type of monitoring		Control site used	Result
	Before measures	After measures	Qualitative	Quantitative
Public use	Yes	Yes	Yes			Improvement

Monitoring documents

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Image gallery

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Additional documents and videos

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Additional links and references

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Link	Description

Supplementary Information

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