作　　者： ; ; ;

机构地区： 北京师范大学地理学与遥感科学学院防沙治沙教育部工程研究中心

出　　处： 《中国沙漠》 2007年第6期932-935,共4页

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： 法 滨海沙地 海南岛

领　　域： [天文地球]