degradation of permafrost 中文意思是什麼
degradation of permafrost
解釋
凍土消融- degradation : n. 1. 降級；免職。2. 退化；墮落。3. 【地質學；地理學】（地表的）剝蝕。4. 【化學】降解，遞降分解（作用）。5. 【物理學】（能的）退降。
- of : OF ＝Old French 古法語。
- permafrost : n. 【地質學；地理學】永久凍土。
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Roadbed construction on permafrost will give substantial disturb for the heat and mass transfer balance between the ground surface and atmosphere, usually, roadbed construction increases the amount of absorbed heat via vegetation removal, solar radiation and increased role of water activities in the adjoining area, then cause the local degradation of the permafrost underneath, as a result may lead to damage of the roadbed
多年凍土區道路的修築，改變了原來天然地表與外界的熱交換關系，通常由於地面植被的破壞、太陽輻射和水的影響，導致進入地層中的熱量增加，引起多年凍土區凍土的融化，從而導致路基面破壞。
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