Case study:Scolo Desolino restoration project

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Location: 45° 34' 44.92" N, 12° 8' 11.87" 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, Monitoring, 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
This is a parent project encompassing the following projects	No

New in-stream wetland

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 4220 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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Catchment and subcatchment

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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, Zero river restoration project

Site

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Name	Scolo Desolino
WFD water body codes	672_30
WFD (national) typology
WFD water body name	Fiume Dese
Pre-project morphology	Plane bed
Reference morphology	Low gradient passively meandering
Desired post project morphology
Heavily modified water body	Yes
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

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Reach length directly affected (m)
Project started	2005
Works started
Works completed
Project completed	2009/01/01
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

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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

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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 and out-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

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quality elements

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

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

Monitoring documents

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Image gallery

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Creation of new meanders

Riparian and aquatic vegetation in a restored reach

Additional documents and videos

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Additional links and references

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Link	Description
http://http://http://www.cirf.org/rf2012/atti/rischio Cornelio.pdf	Paper describing the project presented at the II Conference on river restoration in Italy (2012) - In Italian
http://http://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

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