Case study:Isar-Plan

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Location: 48° 7' 40.09" N, 11° 34' 41.73" E

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Project overview

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Status	Complete
Project web site	http://www.wwa-m.bayern.de/projekte_und_programme/isarplan/index.htm
Themes	Flood risk management, Habitat and biodiversity, Hydropower, Hydromorphology, Land use management - forestry, Monitoring, Social benefits, Spatial planning, Water quality
Country	Germany
Main contact forename	Nick
Main contact surname	Elbourne
Main contact user ID	User:NickRRC
Contact organisation	State Office for Water Management Munich
Contact organisation web site	http://www.wwa-m.bayern.de/index.htm
Partner organisations	City of Munich
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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The Isar Plan Project is a river restoration project on a stretch of 8Km in the inner city of Munich. The Project was initiated in 2000 and the last site was completed by 2011. The three main goals of the project were: 1) Flood protection 2) Enhancing Species diversity and ecological restoration 3) Improving leisure and recreation

The project is being currently monitored.

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Catchment and subcatchment Select a catchment/subcatchment Edit the catchment and subcatchment details (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 Edit site 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 No National/international site designation Germany - Landschaftschutzgebiet Local/regional site designations Landschaftsschutzgebiet/ Naturschutzgebiet Protected species present Yes Invasive species present Yes Species of interest European green toad (Bufo viridis), little ringed plover (Charadrius dubius), Fish: huchen (Hucho hucho), nase (Chondrostoma nasus), grayling (Thymallus thymallus), burbot (Lota lota), brown trout (Salmo trutta), barbel (Barbus barbus) and chub (Leuciscus cephalus). Flora.rock roses (Helianthemum spp.), broomrapes (Orobanche spp.), meadow clary (Salvia pratensis), quaking grass (Briza media) and the Carthusian pink crocus (Dianthus carthusianorum) Butterflies:Idas blue (Plebejus idas) and common blue (Polyommatus icarus) Dominant hydrology Quick and varying run-off Dominant substrate Gravel- largely limestone River corridor land use Urban, Forest, Flood plains Average bankfull channel width category more than 50 m Average bankfull channel width (m) Average bankfull channel depth category 0.5 - 2 m Average bankfull channel depth (m) Mean discharge category 10 - 100 m³/s Mean annual discharge (m3/s) 63.763.7 m³/s <br />63,700 l/s <br /> Average channel gradient category Average channel gradient Average unit stream power (W/m2) Project background Edit project background Reach length directly affected (m) 8000 m8 km <br />800,000 cm <br /> Project started 1998/01/01 Works started Works completed 2011/08/31 Project completed Total cost category more than 10000 k€ Total cost (k€) 35000€35 k€ <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 more than 10000 k€ State Office for Water Management Munich Matthias Junge Stakeholder engagement and communication more than 10000 k€ City of Munich Peter Schaller Works and works supervision more than 10000 k€ State Office for Water Management Munich Stefan Kirner Post-project management and maintenance more than 10000 k€ State Office for Water Management & City of Munich Monitoring more than 10000 k€ State Office for Water Management Reasons for river restoration Edit reasons for restoration Mitigation of a pressure Riparian development Hydromorphology Structure & condition of riparian zones, Continuity of sediment transport, Quantity & dynamics of flow Biology Fish: Abundance, Habitats, Invertebrates: Disturbance-sensitive species Physico-chemical Bathing water quality Other reasons for the project Improvement of Flood Protection, Landscape enhancement, Recreation Measures Edit Measures Structural measures Bank/bed modifications Gravel banks reintroduced, Re-grading of banks, Removal of concrete bank protection at several sites, widening of river bed, deepening of river floor Floodplain / River corridor Large scale planting of native species, 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 embedding of rootballs and tree trunks, creation of new bicycle path, natural seating stones places on banks Non-structural measures Management interventions Waste management, provision of temporary toilet facilities Social measures (incl. engagement) information for the public Other Monitoring Hydromorphological quality elements Edit Hydromorphological 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 Edit biological quality elements Element When monitored Type of monitoring Control site used Result Before measures After measures Qualitative Quantitative Physico-chemical quality elements Edit Physico-chemical 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 Edit Other responses Element When monitored Type of monitoring Control site used Result Before measures After measures Qualitative Quantitative Public use Yes Yes Yes Improvement Monitoring documents Upload monitoring documents Additional documents and videos Upload additional documents Additional links and references Edit links and references Link Description http://www.restorerivers.eu/Portals/27/NiveditaMahida session05 ECRR2013 Isar-Plan.pdf presentation by N. Mahida http://www.youtube.com/watch?v=JV4Yt9j-h Y&feature=youtu.be N. Mahida talking on you Tube about the Isar Supplementary Information Edit Supplementary Information