Green assets and infrastructures

This project examines: the current state of green infrastructure in the GCR; whether processes are in place to facilitate the use of green infrastructure in urban design and management; and the potential ways of valuing such infrastructure. The project involves spatial studies of open spaces, green assets and ecosystem services in the GCR, how they are/should be valued, and analysis of public and private decisions shaping green space. Wherever possible the current state of green infrastructure and planning will be benchmarked against green infrastructure conditions, policy and practice in other city-regions.

The project will expand on the GCRO’s 2011/12 work around valuing green infrastructure in urban environments under pressure. This included work on the Gauteng Green Strategic Programme; preliminary work to collect digital spatial data on green spaces; a study into stormwater challenges in the region and possible options for sustainable urban drainage approaches; an article for the journal Ecological Economics on valuing Johannesburg’s urban forest; and a scoping paper into biomass & food as part of GCRO’s metabolic flows project.
 
The overall objective of this project is to influence the approach to green asset management within the GCR, by assessing the extent to which green infrastructure has been valued by various stakeholders in the city-region, and by demonstrating ways to incorporate green infrastructure within government budgeting and planning process. The premise underlying this evolving body of work is that through effectively valuing ecosystem services, green assets can be understood in the same way as engineered systems, and similarly accounted for as items in municipal budgeting, planning and asset management systems. Demonstrating ways to value green infrastructure from an ecosystem services perspective within municipal processes therefore feeds both academia and policy interests. 
 
The project will deliver a number of policy- and academic- outputs over a three year period, culminating in a Guideline Green Infrastructure Plan for the GCR. This key policy output will provide a set of proposals on green infrastructure planning presented in such a manner as to be easily incorporated into government policy mandates. With this policy aim in mind, 2012/13 will see the publication of a State of Green Infrastructure Report that assesses the physical state of green infrastructure in the GCR, and evaluates whether municipalities in the city-region have adequately appreciated and valued green infrastructure within their planning processes.  
 
A secondary output of the project will be the generation of a series of maps that present the current and changing reality of green infrastructure in the city-region. These maps will be added to the GCRO’s current interactive-GIS website and later expanded into a ‘separate’ viewer with more interactive functionality. It may not be possible to complete this viewer in 2012/13, but the groundwork will be laid for completion in 2013/14.

Key partners

Current work on the project is utilizing the services of a contractor, ECOGIS, to collect all available digital spatial data for green spaces in Gauteng. The project will partner with a number of local universities including the University of the Witwatersrand, the University of Johannesburg and the University of Pretoria. International universities, including Massachusetts Institute of Technology and Virginia Tech, are additional research partners. The project will engage with local and international policy units and municipalities leading the field of green infrastructure. 

Outputs in 2012/13

  • The core policy output for 2012/13 will be a comprehensive State of Green Infrastructure Report
  • The academic output in 2012/13 will be a journal article on valuing green infrastructure in Johannesburg, published in Ecological Economics.

Project reports

Valuing Green Infrastructure in an Urban Environment Under Pressure – The Johannesburg Case in Ecological Economics
Alexis Schaffler and Mark Swilling
June, 2012
Published works
Valuing Green Infrastructure in an Urban Environment Under Pressure – The Johannesburg Case in Ecological Economics

This article considers the importance of robust planning for green infrastructure in fast changing Southern African cities. A key theme is the extent to which ecosystem services are valued publicly, and the opportunity costs of not investing in the green infrastructure. We explore green infrastructure through pairing insights of social–ecological resilience with perspectives on urban infrastructure transitions. By converging these views, we show how green infrastructure can be viewed as an innovative response to challenged urban environments. Through a Johannesburg case study, a number of ecosystem services constitute sources of resilience for an otherwise constrained city. While this is positive and to be valorised, many South African cities are in the midst of service delivery protests, so that resilient ecosystems, and the citizen networks that sustain these, are largely overlooked in planning processes. This article offers three key conclusions. First, a proper understanding of green infrastructure requires blending insights from social–ecological system thinking and infrastructure transition scholarship. Second, there is a paucity of knowledge around ecosystem services in Johannesburg, and that the planning to facilitate ecosystem service valuation is largely inadequate. Third, addressing this requires ecosystem valuations relevant to the unique conditions in developing world cities such as Johannesburg.

Download this output from: Valuing Green Infrastructure in an Urban Environment Under Pressure – The Johannesburg Case