Case study:Rio Sant'Ambrogio restoration project

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Location: 45° 35' 19.25" N, 12° 5' 52.21" E

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Project overview

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Status	Complete
Project web site
Themes	Flood risk management, Habitat and biodiversity, Land use management - agriculture, Land use management - forestry, Water quality
Country	Italy
Main contact forename	Paolo
Main contact surname	Cornelio
Main contact user ID
Contact organisation	Consorzio di Bonifica Acque Risorgive
Contact organisation web site	http://http://www.acquerisorgive.it/
Partner organisations
Parent multi-site project	Case_study:Rio San Martino and Piovega di Scandolara restoration project (p.108)
This is a parent project encompassing the following projects	No

The restored stretch

Project summary

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The main objectives of this project concerned the reduction of flood risk and of nutrients supply to Venice Lagoon to avoid eutrophication; in the same time an increase of biodiversity was expected. These different objectives have been reached by a number of restoration actions: river section enlargement, increase of sinuosity by the creation of new meanders,in-stream and out-stream wetlands and adoption of new practices in river management to permit a complete or partial preservation of aquatic vegetation; the creation of 4,200 m.of new woody riparian buffer was mainly done for nutrient removal.

Monitoring surveys and results

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Lessons learnt

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Image gallery

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Before and after restoration

Catchment and subcatchment Select a catchment/subcatchment Edit the catchment and subcatchment details (affects all case studies in this subcatchment) Catchment River basin district Alpi Orientali River basin Bacino scolante della Laguna di Venezia Subcatchment River name Bacino scolante della Laguna di Venezia Area category 1000 - 10000 km² Area (km2) 2,0382,038 km² <br />203,800 ha <br /> Maximum altitude category 100 - 200 m Maximum altitude (m) Dominant geology Ecoregion Italy and Corsica Dominant land cover Intensive agriculture (arable) Waterbody ID Other case studies in this subcatchment: Pagana canal restoration project, Rio San Martino and Piovega di Scandolara restoration project, Rio Sant'Ambrogio restoration project, Salzano wetland and Marzenego river restoration project, Scolo Desolino restoration project, Zero river restoration project Site Edit site Name Rio Sant'Ambrogio WFD water body codes 689_10 WFD (national) typology WFD water body name RioPiovega di Levada - San Ambrogio Pre-project morphology Artificial bed Reference morphology Low gradient passively meandering Desired post project morphology Heavily modified water body No National/international site designation Local/regional site designations Protected species present Yes Invasive species present Yes Species of interest Dominant hydrology Artificially regulated Dominant substrate Sand River corridor land use Intensive agriculture (arable) Average bankfull channel width category 2 - 5 m Average bankfull channel width (m) Average bankfull channel depth category 0.5 - 2 m Average bankfull channel depth (m) Mean discharge category 0.1 - 1.0 m³/s Mean annual discharge (m3/s) Average channel gradient category 0.001 - 0.01 Average channel gradient Average unit stream power (W/m2) Project background Edit project background Reach length directly affected (m) 3,1003,100 m <br />3.1 km <br />310,000 cm <br /> Project started 2005 Works started Works completed Project completed 2009/03/01 Total cost category 1 - 10 k€ Total cost (k€) Benefit to cost ratio Funding sources Veneto Region - “Piano per la prevenzione dell’inquinamento ed il risanamento delle acque del bacino idrografico immediatamente sversante in Laguna – Piano Direttore 2000” Cost for project phases Phase cost category cost exact (k€) Lead organisation Contact forename Contact surname Investigation and design Stakeholder engagement and communication Works and works supervision Post-project management and maintenance Monitoring Reasons for river restoration Edit reasons for restoration Mitigation of a pressure Nutrient removal to reduce eutrophication, reduce flood risk Hydromorphology Create a more natural channel morphology Biology Increase ecological status of Fish, Macrophytes, Macrozoobenthos Physico-chemical Reduce Nitrogen, Phosphorous and Organic pollution Other reasons for the project Increase fruition and biodiversity in general in a agricultural and urban contest Measures Edit Measures Structural measures Bank/bed modifications Bed enlargement Floodplain / River corridor Creation and riconnection of floodplain and new buffer strips Planform / Channel pattern Channel naturalisation, Creation of new meandering channel Other Creation of in-stream wetland Non-structural measures Management interventions Adoption of new practices for acquatic vegetation management Social measures (incl. engagement) Involvement of farmers in buffer strips plantation 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 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 Monitoring documents Upload monitoring documents Additional documents and videos Upload additional documents Additional links and references Edit links and references Link Description http://www.cirf.org/rf2012/atti/rischio Cornelio.pdf Presentation describing the project presented at the II Conference on river restoration in Italy (2012) - In Italian http://www.acquerisorgive.it/page.asp?m=18 A website section dedicated to river restoration projects, studies and monitoring results by Consorzio Acque Risorgive Supplementary Information Edit Supplementary Information