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首页> 外文期刊>Environmental earth sciences >Erosion-creep-collapse mechanism of underground soil loss for the karst rocky desertification in Chenqi village, Puding county, Guizhou, China
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Erosion-creep-collapse mechanism of underground soil loss for the karst rocky desertification in Chenqi village, Puding county, Guizhou, China

机译：贵州省普定县陈其村喀斯特石漠化地下土壤流失的蠕变塌陷塌陷机理

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摘要

Carbonate rocks distribute widely in China. The total area of the carbonate rocks is about 3,430,000 km~2, and the exposed area of the carbonate is approximately 13 % of China's territory. In 2003, soil loss in Yunnan, Guizhou, and Guangxi provinces reached 179,600 km~2, which is almost 40.1 % of the total area, causing rocky desertification. In this study, the erosion-creep-collapse mechanism of underground soil loss for the karst rocky desertification in Chenqi village, Puding county, Guizhou province is proposed. The mechanism occurs under the following geological environment: slope surface undulation, underlying bedrock surface fluctuation and thin and inhomogeneous soil overlying, overlying soil generation by bedrock weathering, underground karst development, and large groundwater depth and lying water table under the bottom of soils. The erosion-creep-collapse mechanism of underground soil loss in the karst slopes is explained as follows: power loss due to human cultivation activities that destroy the soil structure, hydraulic force formed by rainfall infiltration, wet-dry cycle generated by rainfall, erosion effect caused by rainfall penetration, creeping and flowing of plastic-stream soil, and collapse. The erosion-creep-collapse mechanism of underground soil loss has seven steps: disturbance of soils filled in underground karst cave by human activities, internal soil erosion and partial collapse caused by hydraulic power, internal free surface formation within the soil in the filled karst cave, internal soil creeping, soil pipe formation, soil pipe collapse, and ground surface collapse and filling. Soil loss develops slowly, and sudden transportation occurs by collapse. Soil loss can be explained by the proposed mechanism, and soil loss can be prevented by controlling soil collapse.
机译：碳酸盐岩在中国分布广泛。碳酸盐岩的总面积约为3,430,000 km〜2，碳酸盐岩的裸露面积约为中国领土的13％。 2003年，云南，贵州和广西等省的水土流失达到179,600 km〜2，几乎占总面积的40.1％，造成了石漠化。提出了贵州省普定县陈起村喀斯特石漠化地下土壤流失的侵蚀蠕变塌陷机理。该机理是在以下地质环境下发生的：斜坡表面起伏，下层基岩表面波动和上层薄而不均匀的土壤，由于基岩风化作用而产生的上覆土壤，地下岩溶发育以及地下水深大和土壤底部的地下水位。喀斯特地区地下土壤流失的侵蚀蠕变塌陷机理解释如下：人类耕作活动破坏土壤结构的动力损失，降雨入渗形成的水力，降雨产生的干湿循环，侵蚀作用由降雨渗透，塑性流土的蠕动和流动以及塌陷引起。地下土壤流失的侵蚀蠕变塌陷机理有七个步骤：人为活动扰乱了地下喀斯特溶洞中的土壤，内部水土流失和由水力引起的局部塌陷，充满的喀斯特溶洞中土壤内部的自由表面形成，内部土壤蠕变，土壤管形成，土壤管塌陷以及地表塌陷和充填。土壤流失发展缓慢，突然的运输因坍塌而发生。可以通过提出的机制解释水土流失，并且可以通过控制土壤崩塌来防止水土流失。

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  • 来源
    《Environmental earth sciences》 |2014年第8期|2751-2764|共14页
  • 作者

    Jianxiu Wang; Baoping Zou; Yan Liu; Yiqun Tang; Xinbao Zhang; Ping Yang;

  • 作者单位

    Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China,Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China;

    Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China;

    Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China;

    Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China,Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China;

    Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China;

    Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China,Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China;

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  • 正文语种 eng
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  • 关键词

    Karst rocky desertification; Underground soil loss; Erosion-creep-collapse mechanism;

    机译：喀斯特石漠化;地下土壤流失;侵蚀蠕变塌陷机制;

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