...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Environmental Science & Technology >Green Roof Valuation: A Probabilistic Economic Analysis of Environmental Benefits
【24h】

Green Roof Valuation: A Probabilistic Economic Analysis of Environmental Benefits

机译：绿色屋顶评估：环境效益的概率经济学分析

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Green (vegetated) roofs have gained global acceptance as a technologythathasthe potential to help mitigate the multifaceted, complex environmental problems of urban centers. While policies that encourage green roofs exist atthe local and regional level, installation costs remain at a premium and deter investment in this technology. The objective of this paper is to quantitatively integrate the range of stormwater, energy, and air pollution benefits of green roofs into an economic model that captures the building-specific scale. Currently, green roofs are primarily valued on increased roof longevity, reduced stormwater runoff, and decreased building energy consumption. Proper valuation of these benefits can reduce the present value of a green roof if investors look beyond the upfront capital costs. Net present value (NPV) analysis comparing a conventional roof system to an extensive green roof system demonstrates that atthe end of the green roof lifetime the NPV for the green roof is between 20.3 and 25.2% less than the NPV for the conventional roof over 40 years. The additional upfront investment is recovered atthe time when a conventional roof would be replaced. Increasing evidence suggests that green roofs may play a significant role in urban air quality improvement. For example, uptake of NO_x is estimated to range from $1683 to $6383 per metric ton of NO_x reduction. These benefits were included in this study, and results translate to an annual benefit of $895-3392 for a 2000 square meter vegetated roof. Improved air quality leads to a mean NPV for the green roof that is 24.5-40.2% less than the mean conventional roof NPV. Through innovative policies, the inclusion of air pollution mitigation and the reduction of municipal stormwater infrastructure costs in economic valuation of environmental benefits of green roofs can reduce the cost gap that currently hinders U.S. investment in green roof technology.
机译：绿色（无植被）屋顶已成为一项具有全球潜力的技术，具有缓解城市中心地区多方面，复杂的环境问题的潜力。尽管在地方和区域层面都有鼓励屋顶绿化的政策，但安装成本仍然很高，阻碍了对该技术的投资。本文的目的是将绿色屋顶的雨水，能源和空气污染益处的范围定量地整合到一个经济模型中，该模型可以反映建筑物的特定规模。当前，绿色屋顶的主要价值在于增加屋顶的使用寿命，减少雨水径流和减少建筑能耗。如果投资者的目光超出了前期资本成本，则对这些收益的正确评估会降低绿色屋顶的现值。将常规屋顶系统与广泛的绿色屋顶系统进行比较的净现值（NPV）分析表明，在绿色屋顶寿命结束时，绿色屋顶的NPV比40年来传统屋顶的NPV少20.3％至25.2％ 。在更换传统屋顶时，可以收回额外的前期投资。越来越多的证据表明，绿色屋顶可能在改善城市空气质量中发挥重要作用。例如，每减少一吨NO_x，NO_x的吸收量估计在1683美元至6383美元之间。这些收益包括在本研究中，结果转化为2000平方米的植被屋顶每年可产生895-3392美元的收益。空气质量的改善导致绿色屋顶的平均NPV比传统屋顶的NPV低24.5-40.2％。通过创新政策，将空气污染缓解措施和市政雨水基础设施成本的减少纳入绿色屋顶环境效益的经济评估中，可以缩小目前阻碍美国对绿色屋顶技术投资的成本差距。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号