Case study:Lower Aurino master plan

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Project overview

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Status	Complete
Project web site
Themes	Flood risk management, Habitat and biodiversity, Hydromorphology
Country	Italy
Main contact forename	Caterina
Main contact surname	Ghiraldo
Main contact user ID
Contact organisation	Provincia di Bolzano
Contact organisation web site
Partner organisations
This is a parent project encompassing the following projects	Lower Aurino river: Gatzaue riverbed widening, Lower Aurino river: Molini di Tures riverbed widening, Lower Aurino river: San Giorgio di Brunico riverbed widening

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Project summary

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The Aurino river is a typical Alpine watercourse (basin Area 630 km2, average discharge in summer 30-50 m3/s) affected in the past by gravel extraction, construction of bank defences along part of its course and a major reduction of sediment load from upstream, due to weirs and other protection measures in most tributaries. This determined channel incision, reduction of riverbed width, alteration of morphological structures and dynamics and as a consequence reduced connection with the floodplain, lowering of the groundwater level and loss of riparian habitats (especially hygrophilic riparian forests of Alnus incana). A major effect was also a reduced flood retention capacity, and its recovery by reverting the incision process was one of the main drivers, together with biodiversity increase, to implement a catchment scale restoration scheme. This has been carried out, step by step, for more than a decade and further measures are foreseen.

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Catchment and subcatchment

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Catchment

River basin district	Alpi Orientali
River basin	Adige

Subcatchment

River name	Aurino
Area category	100 - 1000 km²
Area (km2)	630630 km² <br />63,000 ha <br />
Maximum altitude category	more than 2000 m
Maximum altitude (m)
Dominant geology
Ecoregion	Alps
Dominant land cover	Grassland
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Other case studies in this subcatchment: Lower Aurino river: Molini di Tures riverbed widening, Lower Aurino river: San Giorgio di Brunico riverbed widening

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Project background

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Reasons for river restoration

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Mitigation of a pressure
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Other reasons for the project	Reducing riverbed incision, improving flood retention capacity, stop groundwater table lowering

Measures

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Monitoring

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