Economic evaluation of green-roof environmental benefits in the context of climate change: The case of Hong Kong

Peng, Lilliana L.H.; Jim, Chi Yung

doi:10.1016/j.ufug.2015.05.006

Cited by 102 publications

(63 citation statements)

References 32 publications

(1 reference statement)

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“…Demand for green-collar labour is therefore predicted to increase, and methods are being developed to determine the impact of green training programmes on local communities [85]. Economic benefits of green urban spaces have been identified [86,87] and reveal that such infrastructure can provide a competitive advantage at local scales through inward investment, visitor spending, new job creation, and health and environment improvement. Using the Net Present Value (NPV) calculation method, it has been demonstrated that a majority of the ecological restoration projects analysed provided net benefits, not only being profitable but also creating high-yielding investments [88,89].…”

Section: Jobs and Investment Opportunitiesmentioning

confidence: 99%

Characterisation of Nature-Based Solutions for the Built Environment

2017

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Nature has provided humankind with food, fuel, and shelter throughout evolutionary history. However, in contemporary cities, many natural landscapes have become degraded and replaced with impermeable hard surfaces (e.g., roads, paving, car parks and buildings). The reversal of this trend is dynamic, complex and still in its infancy. There are many facets of urban greening initiatives involving multiple benefits, sensitivities and limitations. The aim of this paper is to develop a characterisation method of nature based solutions for designing and retrofitting in the built environment, and to facilitate knowledge transfer between disciplines and for design optimisation. Based on a review of the literature across disciplines, key characteristics could be organised into four groups: policy and community initiatives, multiple benefits assessment, topology, and design options. Challenges and opportunities for developing a characterisation framework to improve the use of nature based solutions in the built environment are discussed.

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Section: Jobs and Investment Opportunitiesmentioning

confidence: 99%

Characterisation of Nature-Based Solutions for the Built Environment

2017

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“…Nevertheless, they provide a significantly higher benefit value, a study undertaken in Hongkong (Peng and Jim 2015) showed a Return of Invest time of 6.8 years for extensive and 19.5 years for intensive green roofs taken a 40-years lifetime into consideration. Policy schemes, incentives by the state and a broader transfer of benefits into financial terms can significantly change the cost-benefit calculation (Bianchini and Hewage 2012).…”

Section: Disservices Of Green Building Technologymentioning

confidence: 99%

“…An understanding of general and local nature-based solutions state of the art and technology readiness is crucial (Derzken et al 2015) resulting in targeted planning and implementation methods (Davies 2015), respecting the overall goal to create a functional, interlinked green infrastructure network (Hansen et al 2016) in respect of ecological (Elmquist et al 2015), economical (Peng and Jim 2015) and societal (Baggethun and Barton 2013) maximised impact ( Fig. 10.15).…”

Section: Nature Provides the Power To Re-wire The Citymentioning

confidence: 99%

Nature-Based Solutions and Buildings – The Power of Surfaces to Help Cities Adapt to Climate Change and to Deliver Biodiversity

Enzi¹,

Cameron

Dezsényi

et al. 2017

Theory and Practice of Urban Sustainability Transitions

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By 2020, according to United Nations and European Union reports, 75% of Europe's population will be living in cities -that's around 365 million citizens. The majority of our cities are hot, dry, polluted and impermeable and increasingly densely populated. The pressure for new development means hard, impermeable surfaces are replacing urban green space and natural habitats. At the same time, climate change is bringing more frequent and extreme weather events such as summer storms, flash flooding and heatwaves.New developments must be resilient. But we also need to retrofit our existing building stock -to adapt to the impacts of climate change. This challenge is also a

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“…The multiple layers of the green-roof structure can protect building roofs from direct solar radiation in the summer, cutting heat flux entering the interior spaces and saving electrical energy for cooling. The evapotranspiration from vegetation and soil can cool the ambient air and improve microclimate, triggering "cool-island" effects [7,8]. The literature has generated extensive studies on green-roof thermal effects in various climatic contexts.…”

Section: Introductionmentioning

confidence: 99%

Seasonal and Diurnal Thermal Performance of a Subtropical Extensive Green Roof: The Impacts of Background Weather Parameters

Peng

Jim

2015

Sustainability

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Most studies explored green-roof thermal effects on a few hot summer days based on short-term monitoring data. Few studies investigated the seasonal and diurnal patterns of thermal performance and associated weather effects. This research aims to address the following two questions: (1) how green-roof thermal performance varies with different season and time; and (2) to what extent can thermal performance be predicted by background weather parameters? A retrofitted extensive green roof was established on the top of a railway station in subtropical Hong Kong. Monitoring data covering a two-year period, one year before roof greening and one year after, were collected and analyzed. Results indicated notable seasonal and diurnal patterns of green-roof thermal performance. It exhibited cooling effects in spring, summer and fall, but warming effects in winter. The cooling effects were more pronounced in summer than spring and fall, on sunny days than rainy and cloudy days, and in nighttime than daytime. Air temperature, relative humidity, wind speed, solar radiation, and soil moisture could explain 83.6%-86% of the thermal effects' variation. The multiple-regression models based on the five weather variables established in this study provide an uncomplicated and direct approach to predict the thermal performance of similar extensive green roofs in subtropical areas. OPEN ACCESSSustainability 2015, 7 11099

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Economic evaluation of green-roof environmental benefits in the context of climate change: The case of Hong Kong

Cited by 102 publications

References 32 publications

Characterisation of Nature-Based Solutions for the Built Environment

Characterisation of Nature-Based Solutions for the Built Environment

Nature-Based Solutions and Buildings – The Power of Surfaces to Help Cities Adapt to Climate Change and to Deliver Biodiversity

Seasonal and Diurnal Thermal Performance of a Subtropical Extensive Green Roof: The Impacts of Background Weather Parameters

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