As the population, economy and urban built environment in the Gauteng City-Region (GCR) expand, government is increasingly under pressure to provide urban infrastructure to support growth. It is increasingly important that this infrastructure is sustainable, minimising the negative environmental impacts often associated with traditional forms of urban development. Green Infrastructure (GI) is the interconnected set of natural and man-made ecological systems, green spaces and other landscape features that provide services and strategic functions in the same way as traditional infrastructure. In harnessing the benefits of ecosystem services, GI has emerged as a more efficient, cost effective and sustainable alternative – and sometimes accompanying approach – to conventional forms of infrastructure. Despite international evidence demonstrating how GI can be used as an alternative to, or in tandem with, traditional infrastructure, the GI approach has so far gained only limited traction in the GCR. In 2013 the GCRO published the State of Green Infrastructure in the GCR report. The report established the principles that underpin GI, used available data to map the extent of GI networks in the region, assessed to what extent municipalities were aware of and applying a GI approach, and demonstrated a possible way to value GI in local government financial systems. The conclusions of the State of Green Infrastructure report were used to guide the next phase of GCRO’s research in support of the adoption of GI approach – a phase focused on better understanding the opportunities for implementing GI in planning and infrastructure development programmes and on addressing some of the challenges associated with shifts towards this approach. A framework for a green infrastructure planning approach in the Gauteng City-Region, GCRO’s fourth Research Report, builds on the foundations laid in the State of Green Infrastructure report. It assembles expert inputs and reflections from collaborative stakeholder discussions in what was known as the Green Infrastructure CityLab to illustrate important considerations for the development of a GI planning approach in the Gauteng City-Region (GCR). The report is divided into three broad sections. Part A introduces the theoretical underpinnings of a GI approach and builds an argument for the importance of incorporating GI into planning and infrastructure development in the GCR. Part B presents three pieces written by external experts. They consider how GI and ecosystem services can be valued by municipalities, and how so-called ‘grey-green’ infrastructure design solutions can be implemented in the GCR. Part C reflects on the stakeholder engagement process that has been undertaken, primarily through the GI CityLab, to deepen understanding of how GI can be embedded in municipal practice. Based on these research findings, this report concludes with a strategy for GCRO’s next phase of work in its ongoing Green Assets and Infrastructure Project.
In the context of heightened climate variability, thinking about ways to redesign our urban areas with more sustainable infrastructure solutions is becoming more and more important. Green infrastructure (GI) is emerging as an alternative approach to traditional (‘grey’) infrastructure in urban planning and development. Its emergence can be understood in terms of the growing demand for infrastructure and services, increased concerns over natural resource constraints and climate change, and the negative impacts associated with traditional approaches to designing and building cities. It has been proposed that GI can provide the same services as traditional infrastructure at a similar capital cost, while also providing a range of additional benefits. However, despite the increasing examples of successful urban GI applications, traditional infrastructure continues to dominate due to the lack of systematic evidence to support GI implementation. As a result, there has been an increase in calls from policy- and decision-makers for a greater evidence base on the benefits of GI, as well as for practical guidelines on its implementation. ‘Towards applying a green infrastructure approach in the Gauteng City-Region’ is the GCRO’s third report in its ongoing research into 'Green assets and infrastructure'. The first two reports in this project series were more theoretically grounded and policy-oriented, whereas this third report is more practical in nature. The first report explored the basic principles around GI, assessed the extent of ecological features in Gauteng and the way governments in the province think about planning and maintenance of green assets. The second report responded to some of the challenges identified in the first report, and in particular the importance of government officials and practitioners in exploring how international green infrastructure plans could be applied in the Gauteng context. This third report builds on the findings of the aforementioned reports and the project’s CityLab series, which highlighted the need to build an evidence base as critical for garnering support for and as well as enhancing investment in the GI approach. Unlike the more theoretically grounded earlier reports, this report comprises four technical sections and practical reflections on how a GI approach could be incorporated into urban planning in the GCR and in other similar urban contexts.
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