Project funded
by theEU–DGEnvironment
L
andsurfacerelevant
forapplication
Artificial surface
Agriculture land
Forest and semi-natural areas
Wetlands
F
inancialcosts
(C
apital
,
operation
&
maintenance
)
Implementation costs are highly dependent on the material applied and the
location.While wooden structures are cheaper and considered nature friendly, they
have a limited life span. Their application requires interventions at source. Stone or
concrete structures tend to be bigger with pronounced flood mitigation purposes.
D
esign
Peak-flow control structures require space. Their scale will depend on the flow and
slope required in order to increase the morphological diversity of the watercourse.
S
cale
Peak flow control structures are most
effective in small headwater catchments
but can also work in catchments of
about 0.1 km
2
.
Peak flow control structures are designed to reduce flow velocities in networks of forest ditches. Peak flow control structures are
engineered ponds
designed
to limit the rate at which water flows out of a ditch network. Because the structures slow water flow, they will contribute to sediment control and can reduce
the size of flood peaks. Peak flow control structures may have a limited lifespan as sediment will eventually fill in the upstream detention pond.
Case studies:
Rural runoffattenuation in theBelfordcatchment,UK;RestorationofDurrowfloodplainalluvialwoodland, Ireland
The measure shares similarities with U10 (Deten-
tion Basins) and U11 (Retention Ponds) and may
also be used in agricultural areas.
FORESTRY
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