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首页> 外文期刊>Environmental earth sciences >Temporal and spatial changes of karst rocky desertification in ecological reconstruction region of Southwest China
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Temporal and spatial changes of karst rocky desertification in ecological reconstruction region of Southwest China

机译：西南生态重建区喀斯特石漠化的时空变化

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摘要

Karst rocky desertification (KRD), as a process of soil degradation, is a limiting factor on enhancing the life condition of people in Southwest China. Fortunately, Chinese governments at different levels had taken it seriously, and the 'Green for Grain' program was initiated to treat and protect the fragile environment. In order to assess the dynamic change of KRD and improve the treatment of it in the future, Pingguo County, one of the 'one hundred typical counties for karst rocky desertification control in China,' was chosen as the study area. The results indicated that the evolution process of KRD landforms in the county might be divided into two phases: degradation phase (1994-2001) and ecological reconstruction phase (2001-2009). In the degradation phase, the area of non-KRD landform decreased from 1,132.02 km~2 in 1994 to 1,056.42 km~2 in 2001. In this phase, the area of non-KRD landform lost 5.51 % to KRD landforms, which mainly transferred to slight KRD landform with an area of 35.55 km~2 counting for 3.14 %. In another hand, the area of non-KRD gained 27.85 km~2, mainly from the slight KRD landform. As a result the area of non-KRD was reduced, meaning that the evolution of KRD became serious. In this phrase, the dynamic change degree of the slight KRD landform was the minimum, and the area of it was the largest among the three KRD landforms. Therefore, transition of slight KRD landform was the main transition type in this phase. The area of slight KRD landforms increased 38.77 km~2 in the county, which mostly took place in the middle and southwest karst regions. In ecological reconstruction phase, the area of non-KRD landform increased to 1,091.90 km~2 in 2009. In this phase, non-KRD landform gained an area of 22.82 km~2 and lost an area of 26.73 km~2, major of which from or to the slight KRD landform. Therefore, the area of non-KRD landform was increased, implying that the evolution of KRD became alleviated. In this phase, transition of slight KRD landform was also the dominant transition type. The decreased area of slight KRD landform was the largest among severe, moderate and slight KRD cases in the southwest karst region, where the ecological reconstruction projects were initiated. The efficient degrees of KRD landforms in southwest karst region were the largest in the four karst regions in this county. This study results may provide a consultant for rocky desertification control and ecological restoration in the future.
机译：喀斯特石漠化（KRD）作为土壤退化的过程，是改善西南地区人民生活条件的限制因素。幸运的是，中国各级政府都认真对待它，并启动了“绿色换粮”计划，以治疗和保护脆弱的环境。为了评估KRD的动态变化并改善其未来的处理方法，选择了“中国一百个典型的喀斯特石漠化防治县”平果县作为研究区域。结果表明，该县KRD地貌演化过程可分为两个阶段：退化阶段（1994-2001）和生态重建阶段（2001-2009）。在退化阶段，非KRD地貌的面积从1994年的1,132.02 km〜2减少到2001年的1,056.42 km〜2。在此阶段，非KRD地貌的面积减少了5.51％，主要转移到面积35.55 km〜2的KRD地貌占3.14％。另一方面，非KRD的面积增加了27.85 km〜2，主要是由于KRD地形微弱。结果，非KRD的面积减小，这意味着KRD的演变变得严重。在这三个短语中，轻微的KRD地貌的动态变化程度最小，而其面积最大。因此，该阶段主要的过渡类型是轻微的KRD地貌过渡。该县轻微的KRD地貌面积增加了38.77 km〜2，主要发生在中部和西南喀斯特地区。在生态重建阶段，非KRD地貌面积在2009年增加到1,091.90 km〜2。在此阶段，非KRD地貌面积增加了22.82 km〜2，损失了26.73 km〜2，主要是从或到达轻微的KRD地形。因此，非KRD地貌的面积增加了，这意味着KRD的演化得到了缓解。在这一阶段，轻微的KRD地貌过渡也是主要的过渡类型。在西南喀斯特地区开展生态重建项目的重度，中度和轻度KRD病例中，轻度KRD地貌的减少面积最大。西南岩溶地区KRD地貌的有效程度是该县四个岩溶地区中最大的。该研究结果可能为今后的石漠化防治和生态恢复提供咨询。

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  • 来源
    《Environmental earth sciences》 |2014年第11期|4483-4489|共7页
  • 作者

    Qiyong Yang; Zhongcheng Jiang; Daoxian Yuan; Zulu Ma; Yunqiu Xie;

  • 作者单位

    School of Geographical Sciences, Southwest University, Chongqing 400715, China, Key Laboratory of Karst Ecosystem and Treatment of Rocky Desertification, Institute of Karst Geology, Chinese Academy of Geological Sciences, Guilin 541004, China;

    Key Laboratory of Karst Ecosystem and Treatment of Rocky Desertification, Institute of Karst Geology, Chinese Academy of Geological Sciences, Guilin 541004, China;

    School of Geographical Sciences, Southwest University, Chongqing 400715, China, Key Laboratory of Karst Ecosystem and Treatment of Rocky Desertification, Institute of Karst Geology, Chinese Academy of Geological Sciences, Guilin 541004, China;

    Key Laboratory of Karst Ecosystem and Treatment of Rocky Desertification, Institute of Karst Geology, Chinese Academy of Geological Sciences, Guilin 541004, China;

    Key Laboratory of Karst Ecosystem and Treatment of Rocky Desertification, Institute of Karst Geology, Chinese Academy of Geological Sciences, Guilin 541004, China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Ecological reconstruction; Karst rocky desertification (KRD); GIS; Dynamic change; Remote sensing;

    机译：生态重建;喀斯特石漠化（KRD）;地理信息系统动态变化;遥感;

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