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Ecological impacts of small hydropower in China: Insights from an emergy analysis of a case plant

机译：中国小水电的生态影响：案例工厂的能值分析的启示

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摘要

The belief that small hydropower (SHP) systems are sources of clean energy with few or no ecological problems has been driving the rapid expansion of SHP plants in China and elsewhere. This paper presents an evaluation of the ecological impacts of SHP based on an emergy analysis of a plant located in Guizhou Province in southwest China. The results suggest that periodic downstream drying-up of the river is the largest contributor to the induced ecological impacts in terms of emergy cost. In 2010, the ecosystem service losses caused by downstream ecosystem degradation totaled 235E+18 seJ, which accounts for 38% of the total emergy utilized in the annual operation of this plant. If such losses could be avoided, i.e., if the SHP operated as designed, SHP projects would produce relatively modest impacts on the environment. When the reaches downstream of the SHP plant are not affected, the environmental loading ratio (ELR) is 2.20 and the emergy sustainability index (ESI) is 0.93; however, the ELR increases to 3.82 and ESI decreases to 0.38 when river drying-up occurs. These results indicate that China should rigorously investigate potential ecological problems of SHP development and proceed with caution rather than readily believing unjustified assumptions. (C) 2014 Elsevier Ltd. All rights reserved.
机译：小型水电（SHP）系统是清洁能源的来源，几乎没有生态问题，甚至没有生态问题，这一信念一直在推动中国和其他地区的SHP工厂的迅速发展。本文基于对西南中国贵州省某工厂的能值分析，对小水电的生态影响进行了评估。结果表明，就能值成本而言，河流的下游下游定期枯竭是诱发生态影响的最大因素。 2010年，由下游生态系统退化导致的生态系统服务损失总计235E + 18 seJ，占该工厂每年运营中使用的总能值的38％。如果可以避免此类损失，即如果SHP按设计运行，则SHP项目将对环境产生相对适度的影响。当SHP工厂的下游河段不受影响时，环境负荷比（ELR）为2.20，能值可持续性指数（ESI）为0.93；但是，当河流干drying时，ELR增加到3.82，ESI减少到0.38。这些结果表明，中国应严格调查小水电发展的潜在生态问题，并应谨慎行事，而不要轻易相信不合理的假设。 （C）2014 Elsevier Ltd.保留所有权利。

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  • 来源
    《Energy Policy》 |2015年第1期|112-122|共11页
  • 作者

    Pang Mingyue; Zhang Lixiao; Ulgiati Sergio; Wang Changbo;

  • 作者单位

    Beijing Normal Univ, Sch Environm, State Key Joint Lab Environm Simulat & Pollut Con, Beijing 100875, Peoples R China;

    Beijing Normal Univ, Sch Environm, State Key Joint Lab Environm Simulat & Pollut Con, Beijing 100875, Peoples R China;

    Parthenope Univ Naples, Dept Environm Sci, I-80143 Naples, Italy;

    Beijing Normal Univ, Sch Environm, State Key Joint Lab Environm Simulat & Pollut Con, Beijing 100875, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Small hydropower; Emergy analysis; Ecological impacts; Ecosystem services;

    机译：小型水力发电;能值分析;生态影响;生态系统服务;

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