土壤侵蚀和土壤保持------外文翻译.doc
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土壤侵蚀和土壤保持------外文翻译,all civil engineers know two main types of soil movement, soil creep or the slow flow of soil, and the faster flows, called slides, slides slips or avalanches. ...
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All civil engineers know two main types of soil movement, soil creep or the slow flow of soil, and the faster flows, called slides, slides slips or avalanches. The faster movement generany moves layers that are deeper than those moved by soil creep.
But more important than either or these two types (as least in the quantity of soil removed every year) are soil erosion, the removal of soil by flowing water from ground that is usually dry and scour, the removal of soil or rook from the bed or bank of a river or stream. Forest soil under growing trees generany does not erode because the leaves, and prevent its attacking the soil. The main action of dead leaves in delaying ran off is that they hold open the drainage channels into the soil ,In bare soil that is not protected in this way, the soil pores are quickly blocked
土木工程师都知道土壤运动的两种形式，即：土壤蠕动或土壤的缓慢流动；和称为滑坡，滑移或崩塌的快速流动。快速流动一般移动的土层较深，而土壤蠕动所移动的土层较浅。
但是笔者两种形式更为重要的运动（至少就每年所移动的土壤数量而言，是土壤侵蚀和冲刷。土壤侵蚀是指水流从平常干燥的地面上流过而冲走土壤；冲刷是指溪水或河流的河床或河岸把土壤或岩石冲走。正在生长中的树木下面的土壤一般不会被冲刷，因为树叶和枯木断枝象吸墨纸一样阻滞雨水并防止雨水侵袭土壤。枯叶抑制地面径流的组主要作用是使雨水进入土壤的排泄渠道保持畅通。在没有受到这种方式保护的裸露地面，降雨时土壤的孔隙由于细小土粒流入很快
But more important than either or these two types (as least in the quantity of soil removed every year) are soil erosion, the removal of soil by flowing water from ground that is usually dry and scour, the removal of soil or rook from the bed or bank of a river or stream. Forest soil under growing trees generany does not erode because the leaves, and prevent its attacking the soil. The main action of dead leaves in delaying ran off is that they hold open the drainage channels into the soil ,In bare soil that is not protected in this way, the soil pores are quickly blocked
土木工程师都知道土壤运动的两种形式，即：土壤蠕动或土壤的缓慢流动；和称为滑坡，滑移或崩塌的快速流动。快速流动一般移动的土层较深，而土壤蠕动所移动的土层较浅。
但是笔者两种形式更为重要的运动（至少就每年所移动的土壤数量而言，是土壤侵蚀和冲刷。土壤侵蚀是指水流从平常干燥的地面上流过而冲走土壤；冲刷是指溪水或河流的河床或河岸把土壤或岩石冲走。正在生长中的树木下面的土壤一般不会被冲刷，因为树叶和枯木断枝象吸墨纸一样阻滞雨水并防止雨水侵袭土壤。枯叶抑制地面径流的组主要作用是使雨水进入土壤的排泄渠道保持畅通。在没有受到这种方式保护的裸露地面，降雨时土壤的孔隙由于细小土粒流入很快
