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,形成了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着推波助澜的作用。
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.
出处
《西北地质》
CAS
CSCD
2004年第2期101-106,共6页
Northwestern Geology
基金
中国地质调查局"黄河源区1:25万生态环境地质调查"项目(19991230004121)资助
关键词
黄河源区
生态环境
恶化
地质原因
headwater area of the Yellow river,eco-environment
degeneration
geologic reason
