干旱区生态环境知识资源中心(Arid): 两种沙障内蚀积地表形态及其空间格局观测研究

Arid

	两种沙障内蚀积地表形态及其空间格局观测研究
其他题名	Erosion and deposition status of surface morphology and observational spatial pattern in two sand barriers
	池政; 徐先英; 刘开琳; 刘虎俊; 李亚琦; 孟瑞玲; 富丽; 李雪宁; 邱晓娜
来源期刊	干旱区地理
ISSN	1000-6060
出版年	2021
卷号	44 期号:6 页码:1654-1664
中文摘要	以腾格里沙漠西缘流动沙丘布设的纤维网沙障(Fibermesh sand barrier,FSB)和土工编织袋沙障(Geotechnical woven bag sand barrier,GSB)为研究对象,采用三维激光扫描技术并结合传统测量法对沙障内微地貌形态进行测算。结果表明:(1)2种沙障区侵蚀深度、侵蚀量和侵蚀表面积均呈沿主风向逐渐增大的趋势。沙丘中线迎风侧GSB侵蚀深度、侵蚀量和侵蚀面表面积都比FSB大,其中侵蚀深度比后者深20%~40%,侵蚀量高于后者45%~70%。(2)2种沙障均在沙丘中南部沙障破损严重,高于其余位置30%~50%,由于土工编织袋被风掏蚀损坏较大,沙障破损范围和破损程度均高于纤维网沙障。(3)在沙障方格内部侵蚀深度最大值多数不是位于方格中心,其中北北东东南东方位带为侵蚀区即弱堆积区,中心和西部为强堆积区。(4)土工编织袋沙障区的侵蚀深度大于纤维网沙障区,同时后者破损率大大低于前者,因此纤维网阻沙障效果优于土工编织袋。利用三维激光扫描技术进行微地貌形态反演不仅可以准确测量出侵蚀深度,而且可以通过软件操作实现侵蚀量和侵蚀面表面积的计算,为风沙地貌和防沙治沙领域精确研究微地貌提供了新型工具和方法。
英文摘要	Desertification is one of the most severe environmental problems facing human beings, and mechanical sand barriers are a critical measure for sand prevention and control. Taking the plant fibermesh and geotextile bag sand barriers on the migratory dunes at the western edge of the Tengger Desert, northwest China as research objects, three-dimensional laser scanning technology combined with traditional measurement methods was used to measure the microtopography and morphology within the sand barriers. For the most part, MATLAB and RiSCAN PRO were used to analyze the data, describe the surface erosion morphology changes within the sand barrier, and draw the surface erosion morphology map. The results demonstrated the following: (1) The erosion depth, wind erosion amount, and wind erosion surface area of the two kinds of sand barrier all exhibited a gradually increasing trend along the main wind direction. The erosion depth, erosion amount, and surface area of the geotextile bag sand barriers on the ridges windward side and at the dunes midline were larger than those of the fibermesh sand barriers. The erosion depth of the former was 20%-40% deeper than the latter, and the erosion amount was 45%-70% higher. (2) Both sand barrier types showed signs of severe damage in the central and southern parts of the region, where they were 30%-50% higher than in the other areas. Because the geotextile bags were damaged by wind erosion, the scope and degree of the geotextile sand barrier damage were greater than those of the fibermesh sand barrier damage. (3) For the most part, the maximum erosion depth in the sand barrier grid was not located at the grids center. The N-NE-E-SE azimuth zone was an erosion and weak deposition zone, and the center and west were a strong deposition zone. (4) The erosion depth of the geotextile sand barrier area was greater than that of the fibermesh sand barrier area, and the damage rate of the fibermesh sand barriers was much lower than that of the geotextile sand barriers. Accordingly, it can be concluded that the fibermesh sand barriers are more durable and effective than the geotextile sand barriers. One previous study found that the maximum erosion depth was not located at the center of the grid. However, the corresponding results on the erosion and accumulation areas differed from the results obtained in this article. The reasons for the difference in results may be the inconsistency in the slope and direction of the dunes as well as deviations in the leading wind direction, sand barrier specifications, and degree of manual intervention. Particularly, these may have resulted in different effects on the wind because of changes in the landform conditions, ultimately leading to the occurrence of the lowest erosion depth position. Still, further exploration and discovery are necessary to determine the sand barriers microtopography and morphological erosion rules. For microtopography and morphology inversion, three-dimensional laser scanning technology and the associated software can be used not only to accurately measure the erosion depth but also to calculate the amount of erosion and the surface area of the erosion surface, providing a new model for a detailed study of microtopographies in the fields of wind-sand landforms and sand control tools and methods. Additionally, it can provide a scientific basis for research on the sand-fixing and sand-resisting abilities of sand barriers.
中文关键词	沙障 ; 三维激光扫描技术 ; 蚀积状况 ; 微地貌形态 ; 阻沙效果
英文关键词	sand barrier three-dimensional laser scanning technology erosion and deposition status micro-topography morphology sand blocking effect
类型	Article
语种	中文
收录类别	CSCD
WOS类目	Agriculture
CSCD记录号	CSCD:7114544
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/377651
作者单位	池政, 中国林业科学研究院荒漠化研究所, 北京 100091, 中国.; 李雪宁, 中国林业科学研究院荒漠化研究所, 北京 100091, 中国.; 徐先英, 中国林业科学研究院荒漠化研究所;;甘肃省治沙研究所;;甘肃民勤荒漠草地生态系统国家野外科学观测研究站;;甘肃农业大学林学院, ;;荒漠化与风沙灾害防治国家重点实验室培育基地;;甘肃民勤荒漠草地生态系统国家野外科学观测研究站;;, ;;兰州;;武威;;兰州, 北京;;甘肃;;甘肃;;甘肃 100091;;730070;;733000;;730070, 中国.; 刘开琳, 甘肃省治沙研究所, 荒漠化与风沙灾害防治国家重点实验室培育基地, 兰州, 甘肃 730070, 中国.; 刘虎俊, 甘肃省治沙研究所, 荒漠化与风沙灾害防治国家重点实验室培育基地, 兰州, 甘肃 730070, 中国.; 李亚琦, 甘肃农业大学林学院, 兰州, 甘肃 730070, 中国.; 孟瑞玲, 甘肃农业大学林学院, 兰州, 甘肃 730070, 中国.; 富丽, 甘肃农业大学林学院, 兰州, 甘肃 730070, 中国.; 邱晓娜, 甘肃省治沙研究所;;甘肃民勤荒漠草地生态系统国家野外科学观测研究站, 荒漠化与风沙灾害防治国家重点实验室培育基地;;甘肃民勤荒漠草地生态系统国家野外科学观测研究站, 兰州;;武威, 甘肃;;甘肃 730070;;733000, 中国.
推荐引用方式 GB/T 7714	池政,徐先英,刘开琳,等. 两种沙障内蚀积地表形态及其空间格局观测研究[J],2021,44(6):1654-1664.
APA	池政.,徐先英.,刘开琳.,刘虎俊.,李亚琦.,...&邱晓娜.(2021).两种沙障内蚀积地表形态及其空间格局观测研究.干旱区地理,44(6),1654-1664.
MLA	池政,et al."两种沙障内蚀积地表形态及其空间格局观测研究".干旱区地理 44.6(2021):1654-1664.