& 3ATC 50th annual accreditation AFL AGM Agrilus Biguttatus aid air quality Alex Kirkley amenity Amenity Conference APPGHG apprentice apprenticeship Apprenticeships Approved Contractors ARB ARB Approved Contractor ARB Magazine ARB Show Arboriculture arborists Arbsafe ash dieback atf Australia award Barcham Trees bats beyond ism biodiversity biosecurity Brexit bs5837 business CEnv chainsaw chalara Charles charter Charter for Trees chelsea Chelsea Flower Show climate climber climbing competiton conference Confor conifers conservation Consultant consultation Council Countryside Stewardship cross industry news Cryphonectria parasitica Cumbria DART death defra Design Devon disease document dothistroma EAC ecology economy Ecotricity education Electricity England EPF Europe European Arboricultural Council exeter Exhibitors Fera flood flooding Forest Research forestry Forestry Commission forests FSC Fund4Trees funding fundraiser gardening government Green Brexit guidance guides Health Help Horse Chestnut horticulture HRH HRH Prince Charles HS2 HSE ICF Irma ISA iso i-Tree Kew land-based Landscape Institute landscaping Lantra law Leaf Minor London LTOA Melbourne mentor NASA National Geographic National Tree Week News nominations notification NTIS NTOA oak Oak-boring Beetle obituary Observatree opm Padua parks parliament Perennial petition Phytophthora planning planting Plumpton College policy poll Prince Charles Prince of Wales Protect and Survive protection ramorum Registered Registered Consultant research response review RFS rhs rogue tree surgeons Safety Scotland Scottish Branch SDG Accord security seminars Share Sheffield Show SocEnv soils staff statement statutory strategy student survey Sweet Chestnut sweet chestnut blight TDAG Technical Officers tender The Woodland Trust TPO Trading Standards trailblazer training transport Tree Tree Council tree loss tree management Tree Officer tree species Tree Surgeons Tree Week tree-felling trees Trees, People and the Built Environment trust' TrustMark UAG Uitlity UK favourite ukas UKWAS urban forest Urban Tree Cover urban trees video Videos volunteer VTA website woodland woodland trust woods young arborists

Disclaimer: The views and opinions expressed in this article are those of the author and do not necessarily reflect the views of the Arboricultural Association.

Share this story

Team uses i-Tree to calculate economic value of soft estate

Author:  Landscape Institute
Last Updated:  25/02/2016

Devon-based landscape practice Evans + Associates, with main contractor Kier and urban forest expert Treeconomics, has won the Delivering Sustainable Value and Solutions category in Highways England's recent national awards.

The team used the new i-Tree software in a pilot study to demonstrate how the benefits of trees in the agency's Devon and Cornwall soft estate can be quantified in terms of monetary value, and how this information could further support and protect them.

Arboreal data is input and the software analyses the benefits of the trees in terms of value to communities, pollution removal, carbon sequestration and storm water management. From this, an economic value can be calculated, informing decisions about future replanting and maintenance, with trees used to provide screening, landscape integration and habitats for flora and fauna.

In the Devon and Cornwall case study, the award-winning team calculated that trees on Highways England's soft estate are worth £40 million in total, based on their health, attributes and prominence in the landscape. The system also provided accurate data of the type, size and state of health of the trees in the area.

Gareth Evans, of Evans+Associates, said:

'This project was successful on several levels but in particular it clearly demonstrated, in financial terms, some of the environmental benefits associated with the highways soft estate. This information can then assist the management of the existing soft estate and maximise and promote the potential environmental benefits.'

Highways England said it remains committed to ensuring that work carried out on its road network does not result in a net loss of biodiverstiy. It is currently one of the biggest planters of trees and shrubs in England, planting 402,000 trees in 2014/15.

Kier now plans to use the technology in the other contract areas it manages on Highways England’s behalf, helping develop eco-strategies for new and existing trees.