Case study:Rio Sant'Ambrogio restoration project: Difference between revisions

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|Project summary=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.
|Project summary=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.
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{{Case study subcatchment
{{Case study subcatchment
|Subcatchment=Bacino scolante della laguna di Venezia
|Subcatchment=Bacino scolante della laguna di Venezia
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{{Measures
{{Measures
|Bank and bed modifications measure=Bed enlargement
|Floodplain / River corridor=Floodplain reconnection, Floodplain creation, Buffer strips,
|Floodplain / River corridor=Creation and riconnection of floodplain and new buffer strips  
|Planform / Channel pattern=Channel naturalisation, Channel widening, Meandering channel,
|Planform / Channel pattern=Channel naturalisation; Creation of new meandering channel  
|Other technical measure=Creation of in-stream wetland
|Other technical measure=Creation of in-stream wetland
|Management interventions=Adoption of new practices for aquatic vegetation management
|Management interventions=Adoption of new practices for acquatic vegetation management  
|Social measures=Involvement of farmers in buffer strips plantation
|Social measures=Involvement of farmers in buffer strips plantation  
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{{Additional links and references
{{Additional links and references
|Link=http://http://www.cirf.org/rf2012/atti/rischio_Cornelio.pdf
|Link=www.cirf.org/rf2012/atti/rischio_Cornelio.pdf
|Description=Presentation describing the project presented at the II Conference on river restoration in Italy (2012) - In Italian  
|Description=Presentation describing the project presented at the II Conference on river restoration in Italy (2012) - In Italian
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{{Additional links and references
{{Additional links and references
|Link=http://www.acquerisorgive.it/page.asp?m=18
|Link=www.acquerisorgive.it/page.asp?m=18
|Description=A website section dedicated to river restoration projects, studies and monitoring results by Consorzio Acque Risorgive
|Description=A website section dedicated to river restoration projects, studies and monitoring results by Consorzio Acque Risorgive
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Latest revision as of 16:42, 2 January 2019

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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


Before and after restoration
After restoration.jpg
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Catchment and 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

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

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

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

Structural measures
Bank/bed modifications
Floodplain / River corridor Floodplain reconnection, Floodplain creation, Buffer strips
Planform / Channel pattern Channel naturalisation, Channel widening, Meandering channel
Other Creation of in-stream wetland
Non-structural measures
Management interventions Adoption of new practices for aquatic vegetation management
Social measures (incl. engagement) Involvement of farmers in buffer strips plantation
Other


Monitoring

Hydromorphological quality elements

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

Biological quality elements

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

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

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


Monitoring documents



Additional documents and videos


Additional 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

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