ABSTRACT

Introduction: Although Brownfield greening (BG) can be a crucial solution to green space deficiency in dense urban areas, the potential benefits of different BG initiatives have rarely been quantitatively pre-evaluated. Here, the concept and main features of BG and its costs and benefits are firstly depicted. Next, a conceptual framework is presented which combines ecosystem service (ESS) valuation, economic cost-benefit analysis, and spatial pattern analysis. The framework is used to perform ex ante valuation of the ESS value of BG in Xuhui District, Shanghai.

Outcomes: The scenario comparison results show that it can spatially reflect a closer-to-reality value of ESS at the urban scale instead of a theoretical value at the site scale. The ultimate values of ESS (After economic and landscape adjustments) in the composite scenario is more than 21% higher than those in the full-eco scenario, whereas the initial values of ESS (before the adjustments) in the former was 14% lower than those in the latter. These results suggest that a considerable part of brownfield greening projects need to be implemented in the more populated and economically vibrant areas instead of solely in the ecological construction zone, thereby correspondingly providing more cultural and regulation services and forming a better urban green space network.

Conclusion: The framework provides a simple, science-based, and feasible tool for making BG decisions from a systematic perspective in dense urban areas. It can help meet the need for applying ESS knowledge to BG-based green space planning and policy making in the context of urban sustainable development.

摘要

简介：尽管棕地绿化（BG）是解决密集城市地区绿地不足的关键解决方案，但很少对BG不同举措的潜在收益进行定量的预先评估。在此，首先描述了BG的概念和主要特征及其成本和收益。接下来，提出了一个概念框架，该框架结合了生态系统服务（ESS）评估，经济成本效益分析和空间格局分析。该框架用于对上海徐汇区BG的ESS价值进行事前评估。

结果：情景比较结果表明，它可以在空间上反映出城市规模的ESS接近真实值，而不是站点规模的理论值。综合情景中ESS的最终价值（经济和景观调整后）比全生态情景中的最终价值高21％，而前者的ESS初始值（调整前）比完整生态情景中的初始值低14％。后者。这些结果表明，需要在人口稠密，经济活跃的地区而不是仅在生态建设区内实施相当一部分的棕地绿化项目，从而相应地提供更多的文化和法规服务，并形成一个更好的城市绿地网络。

结论：该框架提供了一个简单，基于科学，可行的工具，可以从系统的角度在人口稠密的城市地区做出BG决策。它可以帮助满足在城市可持续发展的背景下将ESS知识应用于基于BG的绿色空间规划和政策制定的需求。