干旱区生态环境知识资源中心(Arid): 库姆塔格沙漠羽毛状沙垄风沙活动强度特征

Arid

	库姆塔格沙漠羽毛状沙垄风沙活动强度特征
其他题名	Intensity of Sand-blown Activities over Feather-shaped Sand Ridge of Kumtag Desert
	廖空太 1; 李耀辉 2; 刘虎俊1 ; 王继和1 ; 苏志珠 3; 唐进年 1; 丁峰 1; 张景春 1; 俄有浩 1; 郑庆钟 1
ISSN	1000-694X
出版年	2008
卷号	28 期号:3 页码:399-404
中文摘要	以库姆塔格沙漠腹地的羽毛状沙垄为床面,通过风季实地观测与分析,研究了羽毛状沙垄的近地面风况、粒度特征及风沙流结构等.结果表明:羽毛状沙垄近地面风况具有明显的季节性,冬季盛行东风,其他季节盛行东北风;全年平均风速5·94 m·s~(-1),大于起沙风频率占总量的46·76%;新月形沙垄粒度变化在1·22～1·86之间,分选较好,垄间沙埂粒度变化在1·35～2·11之间,风选属于中偏差;随着风速的增大,地面以上0-2 cm高度层所含沙量有明显减少的趋势,2-20 cm所含沙量有增加的趋势,0-20 cm所含沙量占总输沙量的92·28%以上;在地面以上0-40 cm高度内,输沙率同2 m高处1 min平均风速为幂函数关系,不同性质的地表对输沙率有较大的影响;羽毛状沙垄的风速变化表现为新月形沙垄和垄间沙埂不同部位气流的增速和减速,风向变化表现为同风场下沙垄与沙埂风向夹角的存在.
英文摘要	Through on-the-spot observation in windy season and data analysis a study on the wind regime,grain size characteristics and wind-sand flux structure near sand bed of feather-shaped sand ridge in the Kumtag Desert was conducted.The wind regime was seasonally changing,the E-dominated wind blew in winter and the N-E dominated wind blew in the other seasons.The annual average wind speed was 594 m·s~(-1) in the area,and the frequency of sand-blowing threshold wind was 46.76%.The grain size of barchan ridge was within 122186,belonging to better rating,and the grain size between sandy ridges was within 135211,belonging to weaker rating.With the increasing of wind speed,the sand content in wind-sand flux aboveground 02 cm reduced obviously;the content within 220 cm tended to increase,occupying more than 9228% of the total.The sand-transporting rate of 040 cm height had power function relation with the average wind speed per minute at 2 m,in addition it was influenced strongly by different landforms.The wind regime over feather-shaped sand ridges appeared on the wind-speeding and wind-slowing in different positions of barchan and lowland,also on the variation of wind direction angle between that faced sand ridges.
中文关键词	库姆塔格沙漠 ; 羽毛状沙垄 ; 风沙活动特征
英文关键词	Kumtag Desert feather-shaped sand ridge characteristics of sand-blown activity
语种	中文
国家	中国
收录类别	CSCD
WOS类目	GEOSCIENCES MULTIDISCIPLINARY ; ENGINEERING AEROSPACE
WOS研究方向	Geology ; Engineering
CSCD记录号	CSCD:3242244
来源机构	甘肃省治沙研究所 ; 中国气象局兰州干旱气象研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/223130
作者单位	1.甘肃省治沙研究所, 甘肃省荒漠化防治重点实验室, 武威, 甘肃 733000, 中国; 2.中国气象局兰州干旱气象研究所, 兰州, 甘肃 730020, 中国; 3.中国林业科学研究院, 北京 100091, 中国
推荐引用方式 GB/T 7714	廖空太,李耀辉,刘虎俊,等. 库姆塔格沙漠羽毛状沙垄风沙活动强度特征[J]. 甘肃省治沙研究所, 中国气象局兰州干旱气象研究所,2008,28(3):399-404.
APA	廖空太.,李耀辉.,刘虎俊.,王继和.,苏志珠.,...&郑庆钟.(2008).库姆塔格沙漠羽毛状沙垄风沙活动强度特征.,28(3),399-404.
MLA	廖空太,et al."库姆塔格沙漠羽毛状沙垄风沙活动强度特征".28.3(2008):399-404.