Property:Project summary
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This is a property of type Text.
B
To remove the existing concrete river channel and create new meanders in the middle area of the River Park; remove some existing paths and provide new; provide new street furniture and a gazebo. Phases 2 will include similar civil engineering and landscaping works as Phase 1 to continue the themes and help achieve the objectives. It will also emphasise on community participation. +
W
To remove the existing notched weir and regrade the bed to establish more natural processes on this stretch of river and improve marginal vegetation/ habitat as a result. This in turn will benefit fauna dependent on marginal and aquatic habitats and fish passage will be unrestricted. This length of river is largely owned by the EA and was straightened to accommodate the M11 and North Circular improvements. The channel was over-sized channel with flood embankments on both sides set back a few metres from the “first stage” riverbanks. The weir may have been installed to reduce the gradient. These channel modifications have resulted in a degraded stretch river in terms of both ecology and geomorphology. +
H
To remove the weir to restore a more natural flow regime to the channel. Weir structure across the lower section of the Beverley Brook which does not fulfil its original use and it also causes backing up of silt which is a large blockage in the river. +
R
To remove two gauging stations which were no longer needed for operational monitoring in order to restore fish passage +
To restore 500 m of chalk stream habitat +
W
To restore 520 metre length of the River Tame – re-naturalising the river and improving
access for people.
Natural Environment Restoration - The project will restore natural river processes to the
River Tame along the eastern edge of Kingsbury Water Park by altering the profile of the
current incised river banks and widening the river. This will allow the natural development
of riffles which will not only improve habitat but also increase aeration of the Tame and
thus water quality. Spoil will be used in Hemlingford Water to shallow the eastern and
northern edges, where a reedbed (a BAP priority habitat) will be created separately through
Warwickshire County Council’s Higher Level Stewardship agreement (HLS), to increase
biodiversity and prevent erosion at the edge of the lake from boat wash.
Improved Access - The re-profiling work will enable walkers using the footpath between
Hemlingford Water and the River Tame to see the river which is at present hidden by a mound
of dredgings. Access will be created on the left bank and improved on the right bank of the
river. There will also be improved safety for locals who swim/paddle in the river.
A ramp will be created (from the spoil) to allow access from the raised walkway at the
northern end of the site to the right bank of the river. This will create a circular walk along both banks of the Tame between the two bridges. +
R
To restore a 250m long section of Lowthorpe Beck +
S
To restore a length of stream to remove need for and cost of annual maintenance +
B
To restore connection between the flood plain and a flood plain pond +
A
To restore degraded section of SSSI in line with Test and Itchen River Restoration Strategy and WFD objectives through a series of well known river restoration techniques
The "Abbots Worthy Restoration Project" aims to revitalise a degraded section of a Site of Special Scientific Interest (SSSI) by implementing established river restoration methods, aligning with the principles outlined in the "Test and Itchen River Restoration Strategy" and the goals of the Water Framework Directive (WFD), focusing on improving the ecological health of the river by creating more natural habitats for aquatic life through techniques like removing obstructions, re-profiling river banks, adding gravel, and planting native vegetation.
Key elements of the project:
Following the Test and Itchen model:
The project will draw on successful restoration techniques used in the Test and Itchen rivers, which are renowned for their chalk stream ecosystems, likely including the removal of weirs, re-meandering of the river channel, and the introduction of woody debris to create diverse habitats.
Addressing degradation:
The project will identify and address the specific degradation issues within the SSSI, such as excessive erosion, lack of instream habitat complexity, and poor water quality, which could be hindering the aquatic life present.
Diverse restoration techniques:
*Channel modifications: Reshaping the river channel to create more natural meanders and variations in water flow to mimic a healthy river system.
*Gravel addition: Placing gravel in strategic locations to provide spawning grounds for fish species.
*Bank stabilization: Using natural methods like planting native vegetation to stabilize eroding banks and create riparian buffers.
*Woody debris management: Adding or strategically placing fallen trees within the river to provide shelter and complexity for aquatic organisms. +
N
To restore the Clun SAC to favourable condition by reducing sediment and nutrient inputs which are contributing to the decline of the freshwater pearl mussel population +
R
To restore the River Wharfe SSSI as per the River Wharfe Restoration Plan +
To restore the hydromorphology and ecological value of the River Wensum through physical habitat restoration within the sections of river which have been designated as a Site of Special Scientific Interest (SSSI) and Special Area of Conservation (SAC) +
W
To take advantage of regular maintenance activities and utilise existing woody materials to reduce bank side erosion, whilst creating a better riverine habitat.
Objectives:
*Increase riverine diversity
*Stabilise eroding banks
*Reduce sediment input in to the river
*Provide fish refuge areas
*To explore environmental options whilst undertaking regular maintenance activities
*Bring multiple benefits through a joined up approach.
*Reduce ongoing maintenance cost
*Utilise existing materials
*Meet Water Framework Directive objectives
Phase 1 of the project delivered works along a section of bank 300 metres long, initially 40 meters have been reveted and a number of trees pinned.
Phase 2 increased the length of works by a further 1.5km and included bank protection and tree pinning. +
T
To undertake habitats improvements on a 1.25km stretch of Thornton Beck +
F
Tordera River as it passes through the town of Tordera has lost the dynamism that was a few years ago, leaving behind an oxbow on the left.
The main objectives are improve lateral and longitudinal connectivity, both hydrological and biological, improving the diversity of habitats in the river system, restore riparian plant communities and minimize flood risk . +
Tordera River passing through Sant Celoni, boxed in between the AP-7, to its right bank, and industrial parks and estates, to his left side, presents a high state of degradation. These interventions in the territory have altered the natural course of the river and caused the loss of habitats within the area. In these latter interventions we must add the intensive use floodplain for agriculture, livestock, crops poplar and aggregate extraction.
The main objectives of this project are: To improve the structure and composition of the vegetation; landscape integration of rip-raps; Creation of refuge and breeding ground for otters and awareness campaigns. +
R
Totnes broad and long weir historically directed flow into a mill leat. At the northern end of the weir a pool-and-transverse type fish pass is currently in a state of disrepair and is supplied with an excessive flow rate to facilitate fish movement.
A proposal is currently being considered to install a hydropower scheme on part of the existing weir structure comprising a pair of Archimedean screw turbines. The scheme would also encompass an additional Larinier type fish pass, alongside the repair of the existing pool-and-traverse fish pass. Underwater cameras and a fish counter would estimate Salmon and Trout migration to spawning grounds in the Upper Dart. The weir itself currently has an uneven crest which would be repaired by installing a plate to the crest to improve the direct flow of water over the weir.
The electrical generation will be used by the King Edward VI Community College, which is one of the largest schools in Devon. A small classroom complex is proposed for the site next to the weir to be used by a KEVICC educational trust.
The project cost is estimated to be in the region of £1 million.
Community Involvement: <br>
- Local college (King Edward VI) will be powered by hydropower scheme <br>
- Building classroom next to project site as part of KEVICC educational project +
S
Tout d’abord, la végétation ligneuse qui avait colonisé
l’étang est défrichée. Les terrasses alluviales de
l’ancien plan d’eau sont décaissées en accentuant
une délaissée en rive gauche afin de créer une zone
humide fonctionnelle (roselière, frayère à brochet).
L’ouvrage de l’ancien étang (OH17) et l’ouvrage aval
(OH20) sont effacés. Leurs fosses de dissipation sont
comblées à l’aide de matériaux grossiers. Un nouveau
lit reméandré est façonné à la pelle mécanique dans l’espace de mobilité de l’ancien étang sur un
linéaire de 380 m. En amont de l’ancienne zone de
remous sur un linéaire de 150 m et en aval sur 340 m,
le tracé du lit naturel est conservé, avec resserrement
du lit mineur d’étiage à l’aide de banquettes successives.
Des blocs sont également disposés dans le
lit pour diversifier les habitats aquatiques. En amont
des deux ouvrages effacés, la restauration s’accompagne
d’une recharge granulométrique sur une
épaisseur de 40 à 50 cm.
Sur tout le linéaire, les berges sont talutées, protégées
par du géotextile et ensemencées d’un mélange
grainier. Cette protection de surface évite le
lessivage de la terre par les eaux pluviales et par les
crues et facilite la reprise de la végétation herbacée.
Sur tout le linéaire, les berges sont talutées, protégées
par du géotextile et ensemencées d’un mélange
grainier. Cette protection de surface évite le
lessivage de la terre par les eaux pluviales et par les
crues et facilite la reprise de la végétation herbacée.
Les vestiges du moulin des Forges sont sommairement
remis en état. Enfin, un seuil déversoir en enrochement
de 1,5 m de haut, est réalisé dans le bras
gauche en aval de l’OH17, pour conserver un plan
d’eau clos dédié à l’activité de pêche. +
M
Two weirs were removed and the site allowed to drain. A temporary dam was built at the top of the site and river flow was piped around the working area. Working from the upstream end, a new channel was dug through the accumulated silt following the line of preferential flow. Nicospan was installed to provide support to the new channel sides and to ensure separation of the silt from the gravel infill, which was imported to form the new river bed. It was important to allow at least 500mm of gravel to provide the depth that chalkstream invertebrates require for their life stage. Excavated silt was distributed around the site within the boundary of old ponds. The new channel was tied into the original course of the river which flowed around the back of the island in the lower pond. A low-lying bund was installed in place of the weir to create a wetland feature. Following completion of the river restoration work, new paths were laid in the gardens and an interpretation board installed. +