Greening the Grey: A Framework for Integrated Green Grey Infrastructure (IGGI)

Naylor, L. A. , Kippen, H., Coombes, M. A., Horton, B., MacArthur, M. and Jackson, N. (2017) Greening the Grey: A Framework for Integrated Green Grey Infrastructure (IGGI). Technical Report. University of Glasgow, Glasgow.

Text (Full Report)
150672Full.pdf - Published Version

Text (Front End)
150672FrontEnd.pdf - Published Version

Text (Appendix 1: Historic)
150672Appendix1.pdf - Published Version

Text (Appendix 2: Urban)
150672Appendix2.pdf - Published Version

Text (Appendix 3: Mowing)
150672Appendix3.pdf - Published Version

Text (Appendix 4: Coastal)
150672Appendix4.pdf - Published Version



This report presents innovations from academia and practice designed to green grey infrastructure assets such as bridges, street furniture and coastal engineering structures that need to remain primarily grey for their essential function. We call this integrated green grey infrastructure (IGGI). We collated material on these innovations and assessed them using a critical success factors (CSF) framework that we –co-developed with a team of practitioners in government agencies and companies to help better evaluate the potential benefits and limitations of using IGGI measures compared to traditional grey engineering solutions. The CSF framework is outlined and demonstrated by assessing the engineering performance and ecosystem services benefits of ecological enhancements used in specific operational scale case studies. The case studies presented in this report show that simple, inexpensive ecological enhancement and green engineering solutions can deliver more multifunctional benefits than business as usual solutions for similar or reduced costs. These ecological enhancements and green engineering options have been compiled and assessed for historic conservation areas, urban areas, estuaries and at the coast. This report is intended to support asset managers, engineers, conservation and biodiversity teams, decision-makers, and other end-users to help them better identify IGGI options and evaluate these against business as usual grey engineering approaches.

Item Type:Research Reports or Papers (Technical Report)
Additional Information:

This NERC-funded green infrastructure project collates findings from a number of integrated green grey infrastructure (IGGI) projects, providing examples of how urban infrastructure that needs to remain primarily grey can be greened to improve outcomes for wildlife and society. Key outputs of the report include a framework for evaluating a series of ‘critical success factors’ to enable comparison between IGGI measures and 'business as usual' grey engineering options, and case study examples from four environment topics: historic, urban, mowing and coastal. This report can be downloaded in different ways:

•Main report containing the main report plus all appendices

•Main report only

•Appendix 1: Historic

•Appendix 2: Urban

•Appendix 3: Mowing

•Appendix 4: Coastal

The project was led by the University of Glasgow in collaboration with the University of Oxford, the Environment Agency, Natural Resources Wales, Natural England, Historic England, CIRIA, the Scottish Environmental Protection Agency, Historic Environment Scotland, HR Wallingford and others, as part of a Natural Environment Research Council funded innovation project (NE/N017404/1).

Glasgow Author(s) Enlighten ID:Macarthur, Mairi and Jackson, Neil and Naylor, Dr Larissa and Kippen, Mr Hugh
Authors: Naylor, L. A., Kippen, H., Coombes, M. A., Horton, B., MacArthur, M., and Jackson, N.
College/School:College of Science and Engineering
College of Science and Engineering > School of Geographical and Earth Sciences
College of Social Sciences > Adam Smith Business School > Management
Publisher:University of Glasgow
Copyright Holders:Copyright © 2017 The Authors
Publisher Policy:Reproduced with the permission of the authors

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