冻土退化 meaning in English
permafrost degradation
Examples
- Because of regional underground water level continual dropping and climate changing to aridity , land desertifacation and degeneration of glassland and tundra will tend to worse in short period
由于区域地下水位的持续下降和气候向干旱化发展，土地沙化、草场退化及多年冻土退化短期内将趋于恶化。 - The effect of such factors , as the frozen soil degradation , the soft effect of restraints of soil to bridge foundation , on the safety and seismic response of railway bridges are considered and simulated
结果表明，当冻土退化而导致地基嵌固作用降低时，桥梁墩身的地震弯矩减小，桩身弯矩和墩顶位移增大。 - The first geologic reason for degeneration of the eco - environment in the headwater area of the yellow river is that the increase of the recent geologic function caused desertification and grasslands resource decreased and underside changed , destroied the balance of water - air - heat in the area ; the second is that the water environment changes by the degradation and atrophy of frozen earth cause multilayer and synthesis cause of formation degeneration of the eco - environment ; the third is that the man and rats function accelerated degeneration of the eco - environment in the headwater area of the yellow river
摘要黄河源区生态环境恶化的地质原因之一是现代地质作用增强，形成以荒漠化为主的草地资源退化与下垫面改变，地区水气热平衡破坏；二是因冻土退化、萎缩，引起水环境变异，导致多层面与综合成因的生态环境恶化；三是人为及鼠类活动对源区生态环境恶化起著推波助澜的作用。