URBAN
Project funded
by theEU–DGEnvironment
L
andsurfacerelevant
forapplication
Artificial surface
Agriculture land
Forest and semi-natural areas
Wetlands
F
inancialcosts
(C
apital
,
operation
&
maintenance
)
Channels and rills should only be used as conveyance features within a SuDS train,
in combination with other measures. Therefore, it is not relevant to provide isolated
costs for this measure alone.
D
esign
Channels and rills provide a conveyancing function within a
SuDS ‘train’
. For
example, they may connect a green roof to an infiltration feature. Channels and
rills can be incorporated into landscaping, e.g. in
pedestrianised
areas, without
significant loss of land. They can be designed to any dimensions, which should
aim to slow runoff and encourage sediment deposition, and have a shallow depth.
Channels and rills should be constructed on stable land, and not with a steep
slope. Regular
inspection and maintenance
is important for channels and
rills to ensure effective ongoing operation.
S
cale
Channels and rills should only be used to
collect runoff from a small area.
Channels and rills are
shallow open surface water channels
incorporated in to the start of a SuDS train. They collect water, slow it down and provide
storage for silt deposited from runoff. They can have a variety of cross sections to suit the urban landscape, and can include the use of planting to provide
enhanced visual appeal, water treatment and biodiversity.
Case studies:Dyke relocationon the riverElbe inGermany,ReconstructionofLepikuchannel inTallinnBotanicGarden, Estonia
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