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Ecological risk assessment of the Gannan Plateau, northeastern Tibetan Plateau

机译:青藏高原东北部甘南高原的生态风险评估

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摘要

Desertification, soil salinization and grassland degradation are the major environmental hazards faced by the Gannan Plateau, northeastern Tibetan Plateau. Ecological risk assessment plays an important role in formulating environmental management strategies yet little attention to this region. In this study, we established an ecological risk assessment index system based on 30 evaluation indices in the categories of hydrometeorology, ecological environment, ground surface disturbance, and society and economy for the Gannan Plateau. An entropy method was used to calculate an index weight, and subsequently the matter-element method was used together with extension theory to establish a matter-element extension model of ecological risk. We assessed the ecological risk in this region by calculating the degree of association between index layer, system layer and target layer, and the cumulative ecological risk index. The degrees of ecological risk for the counties of the region were determined by using Arc GIS which would represent a spatial heterogeneity of the risk grade in production. Our results showed that the areas of high ecological risk were in Zhouqu County and Zhuoni County, and others were of low risk (Hezuo City, Diebu County, Xiahe County and Lintan County) or intermediate risk (Maqu County). The results of the assessment were in accord with the actual observed situation. Thus, our ecological risk assessment index system is appropriate for this region and suggests that high risk counties need a priori ecological protection. Such research could provide a technological support which would potentially prevent or reduce disasters by establishing an ecological barrier to promote the sustainable development of Gannan Plateau.
机译:荒漠化,土壤盐碱化和草地退化是青藏高原东北部的甘南高原面临的主要环境危害。生态风险评估在制定环境管理战略中起着重要作用,但对该地区的关注却很少。在这项研究中,我们建立了一个基于30个评估指标的生态风险评估指标体系,该指标包括水文气象学,生态环境,地表扰动以及赣南高原的社会经济。利用熵值法计算指标权重,然后将物元法与可拓理论结合起来,建立生态风险的物元可拓模型。我们通过计算指标层,系统层和目标层之间的关联度以及累积的生态风险指数来评估该地区的生态风险。该地区各县的生态风险程度是通过使用Arc GIS确定的,这表示生产中风险等级的空间异质性。结果表明,生态风险较高的地区为舟曲县和卓尼县,其他风险较低的地区(河佐市,迭部县,夏河县和临潭县)或中等风险地区(玛曲县)。评估结果与实际观察情况相符。因此,我们的生态风险评估指标体系适用于该地区,并建议高风险县需要先验生态保护。这些研究可以通过建立生态屏障来促进甘南高原的可持续发展,提供可能预防或减少灾害的技术支持。

著录项

  • 来源
    《山地科学学报(英文版)》 |2018年第6期|1254-1267|共14页
  • 作者单位

    Key Laboratory of Western China's Environmental Systems Ministry of Education, College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730000, China;

    Key Laboratory of Western China's Environmental Systems Ministry of Education, College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730000, China;

    Key Laboratory of Western China's Environmental Systems Ministry of Education, College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730000, China;

    Key Laboratory of Western China's Environmental Systems Ministry of Education, College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730000, China;

    Key Laboratory of Western China's Environmental Systems Ministry of Education, College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730000, China;

    Key Laboratory of Western China's Environmental Systems Ministry of Education, College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730000, China;

    Key Laboratory of Desert and Desertification, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China;

    School of Management, Lanzhou University, Lanzhou 730000, China;

    Key Laboratory of Western China's Environmental Systems Ministry of Education, College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730000, China;

  • 收录信息 中国科学引文数据库(CSCD);中国科技论文与引文数据库(CSTPCD);
  • 原文格式 PDF
  • 正文语种 eng
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