中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
拉萨河下游河谷风沙源分布特征及其成因

文献类型:期刊论文

作者常春平 ; 邹学勇 ; 张春来 ; 黄永梅 ; 程宏 ; 赵延治 ; 全占军 ; 邱玉郡 ; 房志玲 ; 王升堂
刊名山地学报
出版日期2006
卷号24期号:4页码:489-497
关键词拉萨河下游河谷 风沙源
其他题名The Characteristics and Distribution of the Source Area of AeolianThe Characteristics and Distribution of the Source Area of Aeolian Sand in the Valley of Lhasa River’s Lower Reach ,Tibet,China
通讯作者常春平
合作状况其它
中文摘要根据IKONOS和Quick Bird影像解译和实地调查,对拉萨河下游河谷区风沙源分布特征、沙源粒度特征、植被特征以及人类活动的作用进行了探讨。结果表明,受大中小尺度风场的影响,风沙源地沿河谷两侧呈小面积零星分布在多个地貌部位;河流冲积物是最主要的沙源,沙源粒径90%以上分布在0.25mm以下,以细沙、极细沙和粘粒成分为主,平均含量占60.69%,易于发生风沙活动;风沙活动是影响沙生植被的主导因素,植物种类和盖度能很好反映沙源地的稳定程度;特别在流动沙地和半流动沙地上,植被演替朝着有利于风沙活动发展的方向进行,是风沙活动的主要驱动因素之一,也是风沙活动不断加剧的产物。尽管自然因素是该区域风沙活动的主要成因,人类活动对其发展起到了强化作用。
英文摘要Based on IKONOS and Quickbird interpretation and field survey,the efects of human activities and charactefistic
of san d distribution, ain diameter of sand SOUrCeS an d vegetation in the valley oflower reaches of Lhasa
River are discussed. I1le results indicate that valley sand SOurCes distribute along fiver valley an d its two sides,in
patch and particle form from slope to bottom of valley,an d have close interrelation with large,medium and small
scale ofwind field in space;There ale three categories of accumulation substanceswhich are san d SOurCes in the
lower reaches of Lhasa River valley:fiver alluvium ,flood depo sitand weathering substances of mountain rock.A—
mong them,river alluviumis the most important sand SOurce, ain diam eter of san d SOurce is mainly made of silver
san d,extreme silver sand an d sticky san d,an d over 90% of whose grain size is less t}Ian 0.25 Isls,an d inclinedto
produce wind erosion.Sand activity is the dominant factor afecting sand—nurtured vegetation.Especially the vegetation
on semi-fixedan d semi-movablesan d duneis af ected most seriously,species an d coverage of vegetation can well
reflect the stability of san d SOun3es.Vegetation succesion is developing in the tendency in favor of sand activities,
which is one of a main driving factors an d outcome of worsening sand activities.Th ong h natural factors are the main
cause of the sand activities in thisarea。human activitieswil further strengthen sand activities.
分类号P425.55
资助信息国家自然科学基金(编号:40301025,10532030);国家科技攻关课题(编号:2005BA517A06)资助~~
语种中文
公开日期2010-08-27
源URL[http://ir.imde.ac.cn/handle/131551/1674]  
专题成都山地灾害与环境研究所_成都山地所知识仓储(2009年以前)
推荐引用方式
GB/T 7714
常春平,邹学勇,张春来,等. 拉萨河下游河谷风沙源分布特征及其成因[J]. 山地学报,2006,24(4):489-497.
APA 常春平.,邹学勇.,张春来.,黄永梅.,程宏.,...&王升堂.(2006).拉萨河下游河谷风沙源分布特征及其成因.山地学报,24(4),489-497.
MLA 常春平,et al."拉萨河下游河谷风沙源分布特征及其成因".山地学报 24.4(2006):489-497.

入库方式: OAI收割

来源:成都山地灾害与环境研究所

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