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首页> 外文期刊>Vadose zone journal VZJ >The Effects of Timing of Inundation on Soil Physical Quality in the Water-Level Fluctuation Zone of the Three Gorges Reservoir Region, China
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The Effects of Timing of Inundation on Soil Physical Quality in the Water-Level Fluctuation Zone of the Three Gorges Reservoir Region, China

机译：中国三峡水库区水位波动区淹没对土壤体育质量的影响

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摘要

With the completion of the Three Gorges Dam, soils between the elevations of 145 and 175 m are exposed or submerged seasonally. Soil hydrological and physical properties are changed. A detailed investigation was performed to examine the influence of the timing of inundation on soil physical quality. Samples were collected in the water level fluctuation (WLF) zone and non-WLF zone in Zhongxian County, Chongqing. Soil samples were taken from depths of 0 to 10, 10 to 20, 20 to 30, and 30 to 40 cm. Soil structural quality was assessed by the visual evaluation of soil structure (VESS) method in situ; mean weight diameter (MWD) and mass fractal dimension (D-m) were measured to represent soil aggregate stability; and the soil water retention curve and computed microtomography (micro-CT) images were used to show soil pore networks. Our findings show a deterioration of soil structure indicated by a high structural quality (Sq) score in VESS (the higher the Sq score, the worse the soil structural quality) and a decline in soil aggregate stability indicated by low MWD and low D-m in the WLF zone. The data from both the soil water retention curve and micro-CT images demonstrate a deterioration of soil physical quality through decreased porosity and a shift of drainable micropores (0.1 & radii & 125 mu m) to non-drainable micropores (radii & 0.1 mu m) in the WLF zone of the Three Gorges Reservoir. The potential of environmental hazards of soil in WLF zone was also investigated.
机译：随着三峡大坝的完成，145和175米之间的凸起之间的土壤暴露或渗透季节性。土壤水文和物理性质改变。进行了详细的调查，以研究淹没对土壤体质的影响。重庆中县县的水位波动（WLF）区和非WLF区中收集样品。将土壤样品从0至10,10至20,20至30和30-40cm的深度取出。通过原位的土壤结构（Dess）方法的视觉评估评估土壤结构质量;测量平均重量直径（MWD）和质量分形尺寸（D-M）以表示土壤聚集稳定性;和土壤水保留曲线和计算的微观图（Micro-CT）图像用于显示土孔网络。我们的研究结果表明，在ves（SQ评分越高，土壤结构质量越高，降低土壤结构质量的较差，较差的土壤聚集稳定性下降，所示的土壤结构劣化WLF区域。来自土壤水保留曲线和微型CT图像的数据证明了通过降低的孔隙率和可排水微孔（0.1＆amp; LT; LT;125μm）的偏移来劣化土壤物质质量的劣化（Radii＆amp; 0.1 mu m）在三峡库储藏器的WLF区中。还研究了WLF区中土壤环境危害的潜力。

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  • 来源
    《Vadose zone journal VZJ》 |2018年第1期|共12页
  • 作者

    Cui Junfang; Tang Xiangyu; Zhang Wei; Liu Chuandong;

  • 作者单位

    Chinese Acad Sci Inst Mt Hazards &

    Environm Chengdu 610041 Sichuan Peoples R China;

    Chinese Acad Sci Inst Mt Hazards &

    Environm Chengdu 610041 Sichuan Peoples R China;

    Chongqing Technol &

    Business Univ Coll Tourism &

    Land Resource Chongqing 400067 Peoples R China;

    Chinese Acad Sci Inst Mt Hazards &

    Environm Chengdu 610041 Sichuan Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 天文学、地球科学;
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