The River Tagliamento Sustainable flood defence combined to
floodplain preservation Nicoletta Toniutti, WWF Italy 23/1/2004,
Delft Foto Toni Vorauer - WWF Austria Slide 2 Alps: Near-natural
river sections (Cipra 1992) Fiume Tagliamento Slide 3 River length
178 km Catchment area2871 km 2 Mountainous catchment area 2480 km 2
Ave. Elevation 987 m a.s.l. Source Water Authority Venice Slide 4
*Riparian corridor area 150 km *Active corridor area 61.7 km
*Gravel area 38.7 km *Island area 10.6 km *Water area 12.4 km
*Number of gravel bars 950 *Number of Islands about 700 *Shoreline
length 940 km Photo Toni Vorauer - WWF Austria; Data:Dr. Klement
Tockner - EAWAG Slide 5 Foto Toni Vorauer - WWF Austria Slide 6
M.Spaliviero, Historic Fluvial development of the Alpine-foreland
Tagliamento River, Italy and consequences for floodplain
management, Geomorphology 1277 ( 2002) 1-17 Slide 7 Natura 2000
Greto del Tagliamento photo A.Mohl - WWF Austria Slide 8 WWF
International Petition ERN European Rivers Network Slide 9 Foto
Toni Vorauer - WWF Austria >Severe reduction of riverbed
>consequences on the erosion sedimentation regime
>significant reduction of the recharge of the alluvial
groundwater aquifer Slide 10 Three inter-linked retention basins +
weir 6,46 - 10,35 m high, concrete embankments capacity of 30
million m to reduce the peak discharge from 4600 to 4000 m at
Latisana Photo dr.K.Tockner - EAWAG Slide 11 0.74 1.02 1.23 1.50
1.65 2.35 Stage Tagliamento: Inundation dynamics From Dr. K.
Tockner - EAWAG (CH) (van der Nat et al. 2002) Slide 12 Threats
Slide 13 Slide 14 Foto Nicoletta Toniutti - WWF Italia Slide 15
Current Plan WWF Proposal Municipalities 5 9 Natura 2000 YESNO
Dykes(high) 6,46 - 10,35 1,5 - 5 Diaphragms YESNO Groundwater YESNO
river continuum interrupted not interrupted Foto Toni Vorauer - WWF
Austria Slide 16 *Water Retention basins located closer to the area
of highest flood risk *Conservation of natural and/or semi-natural
floodplains where still existing and maintenance of flow
variability *Setting up an effective forecasting and alert system
*Mix of measures, in particular the non structural ones
*Restoration projects at some critical points/reaches *Public
participation process involving all the main stakeholders,
including the general public *Constitute a multidisciplinary team
involving the scientific community, experts and NGOs WWF Proposal
Foto Toni Vorauer - WWF Austria Slide 17 Hot Issues *Accordance
with WFD --> protection for remaining wetlands ecosystems.
*Coherence at EU policy level *Integrated planning management of
land and water resources *Extensive agriculture management as part
of flood risk reduction strategy *Open information exchange between
governments, experts (university), business enterprises, interest
groups and NGOs Foto Nicoletta Toniutti - WWF Italia Slide 18
Consideration of how wetlands can be used to manage flood and
droughts in a manner compatible with WFD objectives could greatly
assist Member States with implementation and in integrating flood
management strategies with River Basin Plans. It is highly likely
that a mixed range of flood management options will be part of
sustainable flood management in the future Horizontal Guidance on
the Role of Wetlands in the Water Framework Directive Foto
Nicoletta Toniutti - WWF Italia
