文献类型：期刊文献

中文题名：乌兰布和沙漠不同下垫面风沙流结构与变异特征

英文题名：Wind-Sand Flow Structure and Its Variation under Different Surface Conditions in the Ulanbuh Desert

作者：徐军[1] 郝玉光[1] 刘芳[1] 陈海玲[1] 辛智鸣[1] 孙非[1]

第一作者：徐军

机构：[1]中国林业科学研究院沙漠林业实验中心

年份：2013

卷号：20

期号：4

起止页码：95-98

中文期刊名：水土保持研究

外文期刊名：Research of Soil and Water Conservation

收录：CSTPCD;;北大核心:【北大核心2011】；CSCD:【CSCD_E2013_2014】；

基金："十二五"科技支撑项目(2012BAD16B0103)

语种：中文

中文关键词：乌兰布和沙漠;风沙流结构特征;输沙量;粒度组成

外文关键词：Ulanbuh desert; wind-sand flow structure; windblown sand flux; particle size distribution

分类号：P931.3

摘要：对乌兰布和沙漠流动、半固定、固定沙丘3种不同下垫面0—40cm气流层内的风沙流结构的研究表明:(1)0—40cm高度层,输沙量随风速的增加而增加;在不同的风速下,流动沙丘的总输沙量大于半固定沙丘,半固定沙丘的输沙量大于固定沙丘,且呈指数函数关系。(2)在同一风速下,0—40cm高度层,三种不同下垫面的相对输沙量随高度的增加呈幂函数递减趋势。(3)随高度的增加,中沙粒基本呈递减趋势,细沙粒呈现递增趋势,但增幅因下垫面的不同而异。(4)三种不同下垫面近地表0—10cm层风沙流结构特征数S值均小于3.8,而特征值λ均大于1,表明三种下垫面均处于风蚀或搬运状态。
Wind-Sand flow structure and its variation of 0—40cm in the mobile sand dune,semifixed dune and fixed dune of Ulanbuh desert are investigated.The results show as the followings：（1）0—40cm vertical height,total windblown sand flux increases with the increase of wind speed;total windblown sand flux of mobile sand dune is greater than total windblown sand flux of semifixed dune and fixed dune at different wind speed,presents decreasing function of exponential relation;（2）under the same wind velocity,0—40cm vertical height,relative windblown sand fluxes of three types of surfaces present decreasing function of power relation with the increase of the height;（3）with the increase of the height,medium sand particles basically present decreasing trend,while fine sand particles increase,and the increase ranges are different under different surface conditions;（4）three types of different surface conditions near surface 0—10cm layer of windsand flow structure features of Svalues are less than 3.8,andλvalue is greater than 1,indicating that three types of different surface conditions are in a state of wind erosion or transfer.