East Anglia ONE Offshore Windfarm Landscape Management PlanWork No 38 to 41
August, 2016
- thistles (Cirsium spp). - willowherb (Epilobium spp).
Any replacements for those plants that have not established successfully to be replaced with species, size, shape and form to match those of the existing planting scheme.
81.
The following section outlines the aims of the landscape management strategy in relation to the soft landscape proposals and includes a description of maintenance tasks that will be undertaken.
6.2 Woodland Planting (WM1, WM2,WM3) 82.
There are four types of woodland planting, as shown in the Soft Landscape General Arrangement (Appendix 2), each serving a different purpose:
WM1 – CoreWoodland mix. This contains a diverse mix of native species, typical to the area and is intended to provide long-term screening as well as providing habitat and biodiversity. These are generally slower growing, taller species.
WM2 –Woodland Edge mix. This is the diverse mix of species generally used around the edges of the woodland; it is intended to provide habitat variety and diversity but also is used where taller growing species would be inappropriate to plant (for example, adjacent to overhead powerlines).
WM3 – ScreeningWoodland mix. This is a diverse mix using native and a limited number of non-native species. These are generally faster growing species and the intention is for this mix to provide earlier visual screening and also to act as a “nursery crop” for theWM1 andWM2 woodland species. It is anticipated that these trees will be heavily thinned out or removed in the medium to long term.
WM4 –WetWoodland mix. This is a diverse mix suitable for planting within the region of the main SuDS attenuation basin, which may come under frequent or regular inundation. The tree species chosen are able to withstand wet areas or frequent flooding.
83.
Details of the maintenance of the woodland planting areas are detailed in Table 6-1: Table 6-1 Maintenance ofWoodland
Woodland Maintenance Pruning, Trimming and Thinning
1 All tree work will be undertaken to standards defined in BS 3998 and Forestry and Arboriculture Training and Safety Council Safety Guidance.
2 During pruning, trimming and thinning, the operator will ensure adjacent structures, plants or trees are not damaged. Prune and thin trees to maintain a well-balanced natural appearance; remove any suckers or basal growth. Prune between leaf fall and mid-winter. All arising’s to be used in the creation and maintenance of habitat piles or hibernaculum in un-obtrusive areas.
3 After 3 years full growing seasons, selectively thin, re-space and crown raise feathered trees and whips for all transplants up to 3m high
4 After 5 years it is expected that canopy closure will be achieved. Selectively thin weak or poor specimens to allow better specimens more space to thrive. Particular attention should be applied to the nurse crop (WM3) with a view to remove specimens that are supressingWM1 andWM2
5 After 6-10 years it is possible to consider species that can be coppiced (e.g. Hazel). Additional further thinning should take place, particular attention should be applied to the nurse crop (WM3) with a view to remove specimens that are supressing WM1 andWM2 species. A judgement will need to be made as to the selection of specimens to remove so as not to be detrimental to the visual screening.
Weed Control
1 All planting areas will be kept clear of weed growth for the first 3 growing seasons; after 3 years, a herb layer can be allowed to return.
2 Keep areas weed-free by a combination of herbicide applications and hand-weeding/hoeing. Ensure that the methods used will cause a minimum of damage to adjacent planted areas. Do not allow nylon filament rotary cutters or other mechanical tools closer than 200mm to the stem of any tree or plant, carry out operations close to stems using hand tools. Maintain a grass &
East Anglia ONE – EA1-CON-F-GBE-008554
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