干旱区生态环境知识资源中心(Arid): 流动沙丘不同部位风蚀积沙特征研究

Arid

	流动沙丘不同部位风蚀积沙特征研究
其他题名	Characteristics of Wind Erosion and Accumulated Sand in Different Positions of Mobile Dune
	闫德仁; 姚洪林; 胡小龙
来源期刊	水土保持通报
ISSN	1000-288X
出版年	2015
卷号	35 期号:4 页码:288-292
中文摘要	[目的]探究和利用流动沙丘各部位的风蚀积沙规律,为提升固沙技术措施提供依据。[方法]在典型新月型沙丘上设置3台光电子式积雪深度测定仪观测流动沙丘不同部位的风蚀和积沙规律。[结果]在特定风速下落沙坡随着起沙风速变化其积沙深度由1 cm逐渐增加到12 cm,并在起沙风速下降时形成一个强烈的积沙过程;迎风坡在起沙风速时处于最大的风蚀状态,并随风速变化形成一个由强风蚀到弱风蚀的转变过程;沙丘顶部在临近起沙风速时处于风蚀过程,并随起沙风速的逐渐增加又处于积沙过程。此外,流动沙丘迎风坡在12月至翌年5月间净风蚀深度月均值约为29.85 cm;落沙坡在12月至翌6月间积沙深度月均值净增加139.5 cm;而沙丘顶部在3-11月为风蚀发生期,平均风蚀深度变化值为27.3 cm,12月至翌年3月为积沙发生期,平均积沙深度变化值为29.47 cm。[结论]风速对流动沙丘不同部位风蚀积沙特征变化具有重要影响,而且不同部位风蚀积沙程度存在明显差异。
英文摘要	[Objective] Exploration and utilizaton Study on the law of wind erosion and accumulated sand in different parts of mobile dune can provide the support for sand fixation technical measures on the desert combat.[Methods] Three instruments of photoelectron snow retention depth-sounder were set up in the typical crescent dune to determinate the wind erosion and accumulated sand process in different positions of mobile dune.[Results] The accumulated sand depth ranged form 1 cm to 12 cm gradually on sand falling slopes with the change of sand-driving wind velocity under the certain wind velocity scope. And the strong sand deposition process was observed when sand-driving wind velocity declined. Windward slope erosion was in the largest state at the sand-driving wind velocity. And the transition process from strong to weak wind erosion formed with the change of sand-driving wind velocity. The top of the dune was erosion process at the near sand-driving wind velocity. And accumulated sand process was found at the top of the dune with the gradual increase of sand-driving wind velocity. In addition, the monthly mean of net wind erosion depth on windward slope of mobile dune was 29.85 cm from December to next May. The monthly mean net increase of accumulated sand depth on the sand falling slope of mobile dune was 139.5 cm from December to next June. But the erosion occurrence at the top of the dune was found from March to November, and the change value of the average erosion depth was 27.3 cm. The accumulated sand occurrence was found at the top of dune from November to next March, and the change value of the average accumulated sand depth was 29.47 cm.[Conclusion] Wind velocity has the important influence on wind erosion and deposition characteristic change in different positions of mobile dune, and wind erosion and accumulating sand were obvious difference in different parts of mobile dune.
中文关键词	流动沙丘 ; 风蚀积沙特征 ; 起沙风速 ; 动态变化
英文关键词	mobile dune wind erosion and accumulated sand sand-driving wind velocity dynamic changes
语种	中文
国家	中国
收录类别	CSCD
WOS类目	GEOSCIENCES MULTIDISCIPLINARY
WOS研究方向	Geology
CSCD记录号	CSCD:5515453
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/233320
作者单位	内蒙古林业科学研究院, 呼和浩特, 内蒙古 010010, 中国
推荐引用方式 GB/T 7714	闫德仁,姚洪林,胡小龙. 流动沙丘不同部位风蚀积沙特征研究[J],2015,35(4):288-292.
APA	闫德仁,姚洪林,&胡小龙.(2015).流动沙丘不同部位风蚀积沙特征研究.水土保持通报,35(4),288-292.
MLA	闫德仁,et al."流动沙丘不同部位风蚀积沙特征研究".水土保持通报 35.4(2015):288-292.