海南岛滨海沙地风沙活动的^(137)Cs示踪初步研究  

Primary Research on Coastal Sandy Land in Hainan Island by ^(137)Cs Technique

作　　者：张素红[1] 严平[1] 李森[2] 

机构地区：[1]北京师范大学防沙治沙教育部工程研究中心中国沙漠研究中心 [2]佛山大学资源与环境科学研究所,广东佛山528000

出　　处：《中国沙漠》2007年第6期932-935,共4页Journal of Desert Research

基　　金：国家自然科学基金项目(40271012);新世纪优秀人才支持计划(NCET-05-148)共同资助

摘　　要：采用137Cs示踪法研究了海南岛滨海地区风沙活动特征,初步查明:由于137Cs沉积量有限,海南岛137Cs背景值含量较低,距海越近沙地中137Cs含量越低,在植被覆盖较好的草地与林地土壤中137Cs含量稍高;根据灌丛沙丘及丘间地剖面的137Cs分布态势,丘间地剖面137Cs含量趋于微量的均匀化,表现出长期稳定沉积特征,而灌丛沙丘具有人为扰动剖面的特征;海南岛西部沙地风沙沉积速率约为1.25 cm.a-1。　^137Cs technique has received wide application in soil erosion in recent years.In this paper,it is used to analyze the characters of sand movement in coastal sandy land in Hainan Island.The ^137Cs reference inventory of Hainan Island is calculated to be（645.42±54.66）Bq·m^-2,which is lower than the globe average of the Northern Hemisphere.And the ^137Cs activity of coastal sandy land is also low because of the disturbance of water erosion,wind erosion and human activities.Analyzing results of the ^137Cs distribution along soil profiles suggest that the interdune of shrub-coppice dunes experienced a long term of steady deposition,and the profile of shrub-coppice dune appears that it has disturbed by human activities.It is estimated that the deposit speed of sandy land in the west of Hainan Island is around 1.25 cm·a^-1.

关 键 词：^137Cs法 滨海沙地 海南岛 

分 类 号：P931[天文地球—自然地理学]