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首页> 外文期刊>Environmental Science & Technology >Greenhouse Gas Emissions and the Interrelation of Urban and Forest Sectors in Reclaiming One Hectare of Land in the Pacific Northwest
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Greenhouse Gas Emissions and the Interrelation of Urban and Forest Sectors in Reclaiming One Hectare of Land in the Pacific Northwest

机译：西北太平洋地区一公顷土地的开垦中温室气体排放与城市和森林部门的相互关系

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摘要

The interrelation between urban areas and land use options for greenhouse gas mitigation was evaluated by assessing the utility of urban residuals for soil reclamation. Long-term impacts on soil C storage for mine lands restored with urban organic residuals were quantified by sampling historic sites reclaimed both conventionally and with residuals-based amendments. Use of amendments resulted in greater C storage compared to conventional practices for all sites sampled, with increases ranging from 14.2 Mg C ha~(-1) in a coalmine in WA to 38.4 Mg C ha~(-1) for a copper mine in British Columbia. Expressed as Mg C per Mg amendment, effective C increases ranged from 0.03 to 0.31 Mg C per Mg amendment. Results were applied to three alternative land-use scenarios to model the net GHG balance for a site restored to forest or low-density development. The model included construction of 3.9 243 m2-homes, typical of urban sprawl. Emissions for home and road construction and use over a 30-year period resulted in net emissions of 1269 Mg CO_2. In contrast, conventional reclamation to forestland or reclamation with 100 Mg of residuals resulted in net GHG reductions of -293 and -475 Mg CO_2. Construction of an equivalent number of smaller homes in an urban core coupled with restoration of 1 ha with amendments was close to carbon neutral. These results indicate that targeted use of urban residuals for forest reclamation, coupled with high-density development, can increase GHG mitigation across both sectors.
机译：通过评估城市剩余物用于土壤复垦的作用，评估了城市地区与土地使用方案之间的相互关系，以减少温室气体。对城市有机残留物恢复的矿区土壤碳储量的长期影响，通过对常规和基于残留物进行修正的历史遗迹进行采样来量化。与常规做法相比，对所有采样点的修正使用修正后的碳存储量都增加了，范围从华盛顿州一个煤矿的14.2 Mg C ha〜（-1）到华盛顿州一个铜矿的38.4 Mg C ha〜（-1）。不列颠哥伦比亚省。以每Mg修正的Mg C表示，有效C的增加范围为每Mg修正0.03至0.31 MgC。将结果应用于三种可供选择的土地利用情景，以模拟恢复到森林或低密度开发地点的净温室气体平衡。该模型包括建造3.9 243平方米的房屋，这是典型的城市扩张。在过去30年中，房屋和道路建设及使用的排放导致净排放量为1269 Mg CO_2。相反，常规的林地开垦或100 Mg的残渣开垦导致净温室气体减少-293和-475 Mg CO_2。在城市核心区建设同等数量的小型房屋，并通过修正恢复1公顷土地，几乎达到了碳中和。这些结果表明，有针对性地将城市残余物用于森林开垦，再加上高密度的开发，可以提高两个部门的温室气体减排量。

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  • 来源
    《Environmental Science & Technology》 |2013年第13期|7250-7259|共10页
  • 作者

    Andrew Trlica; Sally Brown;

  • 作者单位

    School of Environment and Forest Science, University of Washington, United States;

    SYLVIS Environmental, 427 Seventh Street, New Westminster, BC V3M 3L2, Canada;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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  • 正文语种 eng
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