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这次研究中的取样程序是简单易行的。在每个取样点,使用家用簸箕和刷子,清扫收集0.25—1米~2范围内的疏松表层物质。经过筛后,保留-6+2(即2—6,译者注)毫米粒度的部分。用聚四氟乙烯板栅所制成的孔径为6毫米的粗网,来剔除样品中引起过大取样误差的极粗碎屑,以及有机碎屑杂物。2毫米的细筛只用于选择与基岩有关的滞留沉积物碎屑的最佳保留物,且只允许淋滤和搬运物质(如风成或冲积形成的泥沙)通过。为适应在不同环境中所遇到的具体情况,两个筛子的网度大小可以改变,这要视测量的具体要求而定。
The sampling procedure in this study is straightforward. At each sampling point, use household dustpan and brush to clean and collect loose surface material in the range of 0.25-1 m ~ 2. After sieving, keep -6 + 2 (ie 2-6, translator’s note) part of the mm particle size. A coarse mesh of 6 mm in diameter made of polytetrafluoroethylene grids was used to remove extremely coarse debris and organic debris from the sample that caused excessive sampling errors. The 2 mm fine screen is used only to select the best retention of bedrock-related sediment-laden debris and to allow only leaching and handling of material such as wind or alluvial sediment. To adapt to the specific circumstances encountered in different environments, the size of the two screens can vary, depending on the specific requirements of the measurement.