干旱区生态环境知识资源中心(Arid): 基于倾斜摄影技术的戈壁灌丛沙丘形态反演及其对粉尘释放研究的意义

Arid

	基于倾斜摄影技术的戈壁灌丛沙丘形态反演及其对粉尘释放研究的意义
其他题名	Nebkhas geomorphology in the gobi desert using the unmanned aerial vehicle and tilt camera
	潘凯佳 1; 张正偲 2; 梁爱民 1; 董治宝3 ; 李兴财 4
来源期刊	中国沙漠
ISSN	1000-694X
出版年	2020
卷号	40 期号:2 页码:24-32
中文摘要	灌丛沙丘是广泛分布于西北干旱区的风沙地貌。戈壁上发育的灌丛沙丘在戈壁沙尘释放和固沙能力方面具有重要的指示意义和应用价值。本研究采用倾斜摄影技术对戈壁上的灌丛沙丘形态特征进行观测和提取,并分析沉积物特征,计算戈壁灌丛沙丘的固沙能力,为沙尘释放研究提供依据。结果表明:( 1)戈壁上发育的灌丛沙丘有明显的空间分布格局,即主要分布在干河床的两侧和地势低洼地区。( 2)戈壁灌丛沙丘在形态上和其他地表灌丛沙丘类似,但沙丘的长度、宽度、底面积、体积等小得多,而且参数之间具有明显的相关关系。( 3)沉积物的累积概率曲线表现为三段式,跃移组分的粒度范围( 50~ 700 mum)明显与以往研究不同。沙丘内部和表层的粉沙和黏土含量分别为4.47%和5.24%,从而说明灌丛沙丘能够捕获戈壁上释放的粉尘物质。( 4)戈壁地区单个灌丛沙丘的粉尘释放量约0.05~ 0.08 m~3,固沙能力最大可达18.71 m~3。
英文摘要	Nebkhas are one of main geomorphology,which are widely distributed in arid region. At present, nebkhas geomorphology patterns and its environmental significance in the sandy desert,agriculture land and oasis had been well researched. However,there are little research on the nebkha dunes in the gobi desert. The nebkhas in the gobi desert can be used as one of index for dust emission and sand fixing capacity. Therefore,the unmanned aerial vehicle and tilt camera were used to measure nebhka dunes morphology and sand fixing capacity in the gobi desert. ( 1) The research shows the nebkha dunes have an obvious spatial distribution patterns that almost all nebkha dunes are distributed on both sides of the gullies and low -lying areas. ( 2) The morphology of nebkha dunes on the gobi desert is similar as sandy desert,oasis and agriculture land,but the height,length,width,area and volume are smaller. Moreover,there is a clear correlation between the parameters. ( 3) The cumulative frequency curve of the sediments in the inner and over nebkha dunes shows a distinct three-stage: suspended component ( particle size <63 mum) ,saltation component ( 63-500 mum) and creep component ( >500 mum). The particle size range of the saltation components ( 50-700 mum) is significantly different from previous studies,which reflects the difference of sand supply and sediment transport type. Silt and clay is about 5% in the inner and over the nebkha dunes,which indicats it is come from dust emission in the Gobi desert. ( 4) According to the content of the silt and clay,we can derive that the dust emission quantity of single nebkha in the gobi desert is 0.05-0.08 m~3,and sand fixing capability can reach to 18.71 m~3.
中文关键词	无人机 ; 戈壁 ; 灌丛沙丘 ; 形态 ; 粉尘
英文关键词	unmanned aerial vehicle gobi desert nebkha dune morphology dust
语种	中文
收录类别	CSCD
WOS类目	GEOSCIENCES MULTIDISCIPLINARY
WOS研究方向	Geology
CSCD记录号	CSCD:6691916
来源机构	中国科学院西北生态环境资源研究院
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/318456
作者单位	1.中国科学院西北生态环境资源研究院;;中国科学院大学, 中国科学院沙漠与沙漠化重点实验室;;, 兰州;;, 甘肃;;北京 730000;;100049, 中国; 2.中国科学院西北生态环境资源研究院, 中国科学院沙漠与沙漠化重点实验室, 兰州, 甘肃 730000, 中国; 3.陕西师范大学地理科学与旅游学院, 西安, 陕西 710119, 中国; 4.宁夏大学物理与电子电气工程学院, 宁夏沙漠信息智能感知重点实验室, 银川, 宁夏 750021, 中国
推荐引用方式 GB/T 7714	潘凯佳,张正偲,梁爱民,等. 基于倾斜摄影技术的戈壁灌丛沙丘形态反演及其对粉尘释放研究的意义[J]. 中国科学院西北生态环境资源研究院,2020,40(2):24-32.
APA	潘凯佳,张正偲,梁爱民,董治宝,&李兴财.(2020).基于倾斜摄影技术的戈壁灌丛沙丘形态反演及其对粉尘释放研究的意义.中国沙漠,40(2),24-32.
MLA	潘凯佳,et al."基于倾斜摄影技术的戈壁灌丛沙丘形态反演及其对粉尘释放研究的意义".中国沙漠 40.2(2020):24-32.