摘要
采用物探技术、植物样方调查对青藏公路沿线工程活动对冻土环境因素之间的影响进行了分析研究,结果表明:由于工程活动对原冻土区地貌、植被及表土层结构等的干扰破坏,致使工程区及其影响区冻土上限下降速度加快,同时得出了冻结层上水埋深(1～3m)与冻土层厚度变化的关系以及冻结层上水水位随冻土上限下降而变化的规律.指出工程活动对植被的影响不仅与工程本身有关,也与工程区冻土厚度、地下水、土壤等因素有密切关系.
In this paper, the effect of engineering activity on permafrost environment along the Qinghai-Tibetan Highway is analyzed by means of exploration and plant sampling. The analysis shows that the permafrost table decline is accelerating. The reason is that the original geomorphological structure, vegetation and structure of surface soil were destroyed owing to the engineering activity. Meanwhile the relation is gotten between the water level upon permafrost and the permafrost depth, and the dependence of the water level on the permafrost depth is worked out. At last the following conclusion can be drawn the influence of engineering activity on vegetation not only directly associates with the engineering itself but also indirectly associates with the permafrost depth, grounder water level, soil and other factors in the engineering areas.
出处
《冰川冻土》
CSCD
北大核心
2004年第5期523-527,共5页
Journal of Glaciology and Geocryology
基金
国家自然基金项目(30270255
90102006)
中国科学院知识创新工程重点项目(KZCX1 SW 04)资助
关键词
人类活动
青藏高原
冻土环境
human activity
permafrost environment
Tibetan Plateau
