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1. What will it look like?
Landscape changes Currently the land on the west side of
the Valley is spring and autumn pasture. Flooding will change this into
saltmarsh with creeks and some areas of intertidal mudflat. Saltmarsh
is very beautiful, particularly in summer, and aids in absorbing the force
of the tides. Mudflat is an incredibly rich habitat which supports a great
diversity of wildlife. As more silt is deposited each time the land is
inundated, ground levels warp up so that saltmarsh vegetation
can spread. The Cuckmere Valley supports a range of habitats from shingle
to grazing pasture. Allowing the sea to inundate one area will simply
create another habitat and increase diversity.
Damage to existing
archaeological interest The landscape of the Cuckmere Valley has
been evolving for many years, and this project will provide a unique opportunity
to gain valuable insights into previous landuse. If evidence of former
settlements are found, full record will be made, and flooding the area
is actually likely to preserve any remains. Archaeologists will be present
at all stages of the engineering works to make sure no damage is done
to any existing archaeological interest and to record details about the
structure of the floodbank itself. Any documentation, maps or old photographs
of the Valley would be useful in building up an historical record of the
area.
2. Why is this scheme necessary?
Planned vs unplanned Maintaining the flood defences within
the Cuckmere Valley at their current height will not succeed in the long
term given the fact that sea levels are rising and storms are likely to
become fiercer and more frequent through climate change. During winter
2000, the sea overtopped the banks on several occasions, damaging the
floodbanks and increasing water levels higher up the valley. The sea regularly
overtops the river bank at the mouth; put simply, the banks are now too
low. It is highly likely that a catastrophic storm event will occur again
which will have devastating impacts on the farmland, wildlife and on land
further upstream. Restoring the Valley to a naturally evolving ecosystem
will mean that the intertidal habitats which will be re-created will act
as natural defences to further storm events..
3.
How will access and recreation on the valley floor be affected?
Rights of way/ Access - An established Right of Way along the western
side of the river would unfortunately be lost through the proposed breach.
However, access to the beach will be maintained through two other footpaths
within the valley, and a licensed footpath on the hillside to the west
of the valley could be upgraded to a full public right of way. This would
afford fantastic views across the Valley (be consistent with the use of
capitals) and would provide a similar circular route to that which would
be lost. The Vanguard Way which runs from the Golden Galleon pub to the
beach will be improved by moving sections up onto the 4 m contour, raising
it above flood level and making the whole footpath much drier. Access
to and understanding of the estuary will be enhanced overall through the
installation of interpretation panels to explain the changes to the landscape
and the associated wildlife they are likely to encourage. Bird hides are
also planned to help people enjoy and appreciate the wildlife at close
quarters.
Recreation
- Up to half a million people visit the Seven Sisters Country Park every
year to enjoy the peace and natural beauty of the area, walk, camp and
to see the wildlife. . Canoeing is a very popular activity based at Seven
Sisters Country Park and any scheme will take full account of the needs
of canoeists, and it may well be possible to retain areas of none tidal
water for beginners somewhere within the scheme. Other recreational activities
will also be much enhanced. The re-created intertidal habitats will attract
large numbers of birds and animals, including some more unusual species
like ospreys and seals, and we would like to provide bird hides and interpretation
panels within the Valley to enhance peoples enjoyment and understanding
of the area. The restoration of a naturally evolving estuary will also
have huge potential for increasing the value of the site for education
and research..
4.
What are the other benefits of this scheme?
Climate change/ Rising sea levels Climate change is an issue
of particular concern in southern England. An increase in rainfall, the
gradual sinking of south-east England and a rise in sea-level of as much
as 6 mm per year is moving the low water mark landwards. However, sea
defences prevent the subsequent landward migration of the high water mark
so that intertidal habitats are being squeezed out. This means that low
lying land is at greater risk of flooding, as intertidal habitats like
saltmarsh and mudflats form excellent natural sea defences, absorbing
the power of the waves and acting as a buffer zone.
Flooding upstream
- A feasibility study into the flooding implications of this scheme has
been carried out with encouraging results. It concluded that because of
the increased use of the natural floodplain for storing flood waters,
the risk of flooding upstream would be reduced in certain conditions.
However the work needs to be carefully phased and monitored, using the
latest in sophisticated modelling techniques as they become available.
The capacity of the
floodplain on the west side of the river is about 600,000 cubic metres
on a high tide. In a severe tidal surge it could exceed 1 million cubic
metres. How far upstream the impact of this storage will reduce the depth
of water will depend on the type of storm (the combination of rainfall
and tide).
The long term aspirations
to return the river to the meanders and to remove the walls at the mouth
of the river will require much more detailed modelling. However we hope
that because more water will be going through the mouth of the river on
every tide, the mouth should keep itself clear through the increase in
scour.
5.
What effect will it have on the wildlife in the area?
Damage to existing ecological interest The ponds and ditches
on the valley floor are home to some nationally important species, most
notably water beetles. Although flooding the Valley will mean that some
of these important habitats will be lost, similar habitats will be recreated
further upstream. Phasing of the project will allow the wildlife to adapt
gradually to its new environment, and to move into new niches further
upstream.Long term prospects include creation of more saltmarsh as well
as other important intertidal habitats such as mudflats. In terms of birds,
the re-created intertidal habitats will suit the species already there,
but will attract in greater numbers and more species. .
Importance of new
ecology Intertidal habitats like mudflats and saltmarsh are
declining across the country, particularly in the south east. This is
a significant loss to both wildlife and to our natural coastal protection.
The importance of intertidal habitats is recognised by the listing of
saltmarsh, mudflats, saline lagoons and vegetated shingle as priority
habitats under the UK Biodiversity Action Plan and as habitats which the
UK has international obligations to protect. The first phase of the project
will create about 46 hectares of intertidal mudflats and saltmarsh and
it is likely that a new saline lagoon will be created. In the long term,
removing the training walls at the mouth of the river will increase the
extent and range of vegetated shingle habitat and lagoons, and re-opening
the meanders would further diversify the river and establish new freshwater
habitats.
Intertidal habitats
are declining across the country, particularly in the south east. This
is a significant loss to both wildlife and to our natural coastal protection.
The importance of intertidal habitats is recognised by the listing of
saltmarsh, mudflats, saline lagoons and vegetated shingle as priority
habitats under the UK Biodiversity Action Plan and as habitats for which
the UK has international obligations to protect. The first phase of the
project will create approximately 45 hectares of intertidal mudflats,
which will gradually develop into saltmarsh. Removing the training walls
at the mouth of the river will increase the extent and range of vegetated
shingle habitat and lagoons, and re-opening the meanders would further
diversify the river and establish new brackish habitats.
6.
What will happen to the meanders?
The old meanders are a national landscape icon but they are
at significant risk of being lost completely if the Valley is maintained
in its current state. As there is little water flowing through them, they
are silting up and they may also be at risk of eroding away completely
in the event of a catastrophic bank failure. It is believed
that the best way of maintaining them indefinitely is to restore the natural
processes that formed them originally and the landscape setting that they
formed in. The land around the meanders is much higher than the west side
of the Valley and will therefore form saltmarsh very quickly. The meanders
will briefly disappear under the water on the very high tides of each
month but will otherwise remain high and dry for most of the time, looking
much the same as they do now.
7.
How will the meanders be reinstated?
1. The restoration
of the meanders flow, and dredging of silt (without them eroding which
is likely to involve establishing saltmarsh vegetation around them before
completely opening them to the elements),
2. The relocation of the canoe barn and facilities,
3. Changes to the footpath network (the concrete track to Foxhole cottages
is not affected)
4. Numerous ecological issues,
5. Possibly relocating the mouth of the river,
6. Minor revetments to the A259 road, and
7. Other issues that have been raised already and those that havent.
8.
How will this affect farming on the Cuckmere valley?
Perception of retreating from agricultural land The need
for better coastal protection, especially in the south, has meant that
reclamation of inter-tidal areas for agricultural purposes is becoming
much less frequent, and agricultural practices are starting to change,
recognising that low lying land needs to evolve to adapt to the current
environmental conditions, particularly rising sea levels. There are a
number of grant incentives for farmers and landowners to create habitats
like saltmarsh, and such a grant is being applied for in this case. The
Countryside Stewardship Scheme will provide financial support for the
land to be managed as mudflat and saltmarsh, and the farmer concerned
will be compensate for the loss of grazing pasture on the Valley floor.
Light grazing of the saltmarsh may be required in the long term, as this
can be highly beneficial to both vegetation and the associated wildlife.
Farming
The valley floor to the west of the river is currently leased to a tenant
farmer who grazes the pasture. The National Trust have been working closely
with the farmer to establish how best to secure his livelihood whilst
providing sufficient coastal protection for the area and enhancing wildlife.
Phasing the restoration of the Valley will allow the farmer to gradually
alter his stocking levels and adapt to the changing environment. Although
the grazing pasture would be lost, the Countryside Stewardship Scheme
will ensure that there will be no financial loss to the farmer.r.
9.
How will the public be consulted over these changes?
The Environment Agency has announced that it will be submitting a planning
application for its proposals to restore the Cuckmere Estuary. The decision
to seek planning permission follows extensive consultation with the community
over the past two years. The planning application will be submitted to
Lewes District Council in June 2003. If planning permission is granted,
work could begin to protect the valley as early as autumn 2003. In addition,
the critical importance of involving local people and interest groups
in the scheme is recognised and many events have already been held, such
as guided walks, information boards, roadshows talks and the publication
of the "Back to Nature" booklet. The proposed scheme has already
evolved to incorporate comments from local groups and the partnership
will continue to consult and engage with the local community as the scheme
develops.
10.
What will be the impact on tourism?
1. Because there have
been so few projects of this kind in the past, it is very difficult to
establish the impact that this will have on tourism / visitor numbers.
2. Most people come to see the cliffs and meanders and both of
these will remain.
3. The Concrete track to Foxhole cottages will remain above sea level,
and there will always be access to the beach (although it will probably
be on a different route after phase 2)
4. All of the natural estuaries in the South West / Cornwall / Devon etc
dont seem to put people off visiting them.
11.
Are there any other implications of this scheme that I havent already
been told about?
Erosion/ coastguard cottages One of the long term aims of the restoration
project is to remove the training walls from the mouth of the River and
to allow the Cuckmere to act completely naturally. This is likely to mean
that the mouth will migrate eastwards, meeting the sea beneath Haven Brow.
The movement of shingle along the coast from west to east is likely to
build up a bar of shingle across the mouth of the Haven. This build up
of shingle will help to protect the cliffs below the Coastguard Cottages,
thus providing them with better protection from the sea. Prior to any
works taking place however, geomorphological experts who will be able
to accurately predict the development of the Valley, will be brought in
to make sure we have a clear picture of how the beach will evolve.
Sustainability
working with nature, will mean that coastal protection and flood defence
along the River Cuckmere will be sustainable into the future with little
or no intervention from man. This clearly has huge cost saving advantages
as well as providing peace of mind for people living and working in and
around the Cuckmere Valley. It is predicted that once the restoration
project is complete, and the River is allowed to migrate across the Valley
floor, little if any, works will be needed to protect the area from flooding.
Cost The Environment
Agency currently carry out a number of annual operation and maintenance
activities for the lower Cuckmere. These include bank reinstatement, beach
recycling and removal of shingle from the mouth of the River. Due to the
pressures of sea level rise, the estimated cost of rebuilding the existing
floodbank on the west side of the river up to a sufficient standard is
approximately £1.2 million. This is because the banks are simply
not big enough to cope with rising sea levels. This is clearly not cost
efficient, nor would higher and wider banks be fitting with the landscape.
Allowing the Cuckmere and the Valley to evolve naturally through the restoration
project will save the Environment Agency, and in turn the tax-payer, thousands
of pounds. The National Trust are currently applying for a grant under
the Countryside Stewardship Scheme which will pay for the majority of
the engineering works associated with the restoration and will contribute
towards a management plan for the Valley.
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