干旱区生态环境知识资源中心(Arid): 不同粒径沙粒胶结体覆盖对地表风蚀和输沙率抑制效应的风洞模拟

Arid

	不同粒径沙粒胶结体覆盖对地表风蚀和输沙率抑制效应的风洞模拟
其他题名	Wind-tunnel Simulation on the Effects of Sand Cemented Bodies with Different Sizes on Surface Wind Erosion and Windblown Sand Discharge
	周杰 1; 王海峰 2; 李生宇2 ; 刘志辉 3; 袁鑫鑫 2; 樊瑞静 2
来源期刊	干旱区研究
ISSN	1001-4675
出版年	2016
卷号	33 期号:5 页码:961-965
中文摘要	沙粒胶结体(sand cemented bodies,缩写为SCB)是由众多沙粒胶结而成的大颗粒物质,广泛分布于塔克拉玛干沙漠腹地部分垄间地表。通过风洞实验测定了不同风速下不同粒径沙粒胶结体覆盖对沙床面的土壤风蚀率和输沙率变化的影响。结果表明:风速和粒径是影响SCB覆盖沙床面风蚀率的主要因素。在一定的风力条件下,风蚀率随沙粒胶结体粒径的增加呈指数递减变化,在一定的胶结体覆盖度下,风蚀率随风速增加而增大,且粒径越大风蚀率随风速的增加而增大的趋势更为明显;风速不是影响地表输沙率的主要因素,胶结体粒径在一定程度上对输沙率的影响起主导作用。随着胶结体粒径的增加,沙粒在胶结体覆盖床面产生上升过程,且输沙率随粒径的增加而增大,胶结体覆盖对输沙率的抑制作用主要体现在胶结体覆盖的密度效应上,密度越小输沙率越高。即同一盖度下的胶结体颗粒物,大粒径的胶结体较小粒径胶结体沙床面分布密度、数量都相对较小。因此,大粒径胶结体地表输沙率相对较大。不同粒度范围的胶结体覆盖沙床面表现出不同的风蚀和输沙率抑制效应,依次为:2?3 mm <3~5 mm <5~7 mm <7~10 mm <10 mm。
英文摘要	Sand cemented bodies ( SCB ) were extensively distributed in the hinterland of the Taklimakan Desert. In this study, the effects of SCB with different sizes on restraining aeolian erosion and windblown sand discharge were researched by wind tunnel simulation. Results showed that wind velocity and SCB size were the main factors affecting aeolian erosion. Under certain wind conditions, aeolian erosion restraint rate was decreased exponentially with the increase of SCB size. Under a certain SCB coverage, wind erosion rate was increased with the increase of wind velocity,and the bigger the SCB size was,the more obvious the increase trend of wind erosion with the increase of wind velocity would be. SCB size was the dominant factor affecting the surface windblown sand discharge, but not wind velocity. With the increase of SCB size, there was a rising process of sand grains on the SCB mulch bed, and the windblown sand discharge was increased with the increase of SCB size. The effect of SCB mulch bed in restraining the windblown sand discharge was mainly reflected by SCB density,and the lower the coverage was, the higher the windblown sand discharge would be. At the same SCB coverage, the distribution density and number of the large-sized SCB were lower than those of small-sized SCB. Therefore, the surface windblown sand discharge was relatively high. The restraint of SCB with different sizes to wind erosion and windblown sand discharge was in an order of 2 -3 mm <3-5 mm <5-7 mm <7-10 mm < 10 mm.
中文关键词	沙粒胶结体 ; 粒径 ; 风蚀率 ; 输沙率 ; 颗粒密度
英文关键词	sand cemented body particle size aeolian erosion rate windblown sand discharge particle density
语种	中文
国家	中国
收录类别	CSCD
WOS类目	ENVIRONMENTAL SCIENCES
WOS研究方向	Environmental Sciences & Ecology
CSCD记录号	CSCD:5799488
来源机构	中国科学院新疆生态与地理研究所 ; 新疆大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/234328
作者单位	1.中国科学院新疆生态与地理研究所, 新疆策勒荒漠草地生态系统国家野外科学观测试验站, 乌鲁木齐, 新疆 830011, 中国; 2.中国科学院新疆生态与地理研究所, 乌鲁木齐, 新疆 830011, 中国; 3.新疆大学资源与环境学院, 乌鲁木齐, 新疆 830046, 中国
推荐引用方式 GB/T 7714	周杰,王海峰,李生宇,等. 不同粒径沙粒胶结体覆盖对地表风蚀和输沙率抑制效应的风洞模拟[J]. 中国科学院新疆生态与地理研究所, 新疆大学,2016,33(5):961-965.
APA	周杰,王海峰,李生宇,刘志辉,袁鑫鑫,&樊瑞静.(2016).不同粒径沙粒胶结体覆盖对地表风蚀和输沙率抑制效应的风洞模拟.干旱区研究,33(5),961-965.
MLA	周杰,et al."不同粒径沙粒胶结体覆盖对地表风蚀和输沙率抑制效应的风洞模拟".干旱区研究 33.5(2016):961-965.