Project funded
by theEU–DGEnvironment
L
andsurfacerelevant
forapplication
Artificial surface
Agriculture land
Forest and semi-natural areas
Wetlands
F
inancialcosts
(C
apital
,
operation
&
maintenance
)
The main cost is associated with renaturalisation work that requires engines and
human work.
D
esign
Bed levels should be raised in a manner that does not increase flood levels. This
may be achieved by basing the design on a maximum
water depth
based on
the level at which flows are exceeded 90% of the time. The
material
used for
the river bed should preferably be taken from the alluvial plain or the high water
bed of the river. Backwater effects, i.e. impacts on upstream water levels, have to
be considered in the design and development of the project.
S
cale
The measure is usually implemented
where current rates of erosion are high.
Riverbed material represents the sediment eroded upstream, transported by the river and deposited on the river floor. It can be composed of coarse and/or
fine material. Its re-naturalisation involves recovering the
natural structure and composition
of the bedload where this has been altered over time, in
particular restoring the equilibrium between coarse and fine sediment
Case studies:Restorationof theOdense river,Denmark;River restorationof the lowerAurino in Italy
HYDROMORPHOLOGY
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