干旱区生态环境知识资源中心(Arid): 土壤含水率对风沙流结构及风蚀量的影响

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	土壤含水率对风沙流结构及风蚀量的影响
其他题名	The effects of soil water content on sand flow structure and wind erosion amount with wind tunnel experiment in semi-arid area
	陈银萍; 曹雯婕; 余沛东; 杨欢; 王旭洋; 李玉强
来源期刊	中国沙漠
ISSN	1000-694X
出版年	2021
卷号	41 期号:2 页码:173-180
中文摘要	通过对科尔沁沙地典型生境(流动沙丘、沙质草地和农田)的土壤进行风洞试验,分析了不同含水率下3类土壤的风沙流结构、输沙率及总输沙量的变化趋势。结果表明:(1)不同含水率下,3类土壤的输沙率随高度的增加均呈现减小趋势,且有良好的指数函数关系。(2)随含水率的增加,流动沙丘和沙质草地土壤风沙流沙粒的平均跃移高度增加、012 cm的输沙率占总输沙率之比增加,农田土壤则相反。(3)不同风速下,3类土壤输沙量与含水率的关系可用指数函数或三次函数关系来描述。(4)基于不同风速下输沙量随含水率增加的斜率变化程度,可将含水率分为3个区间:平稳下降区间、跃变区间和衰弱区间;流动沙丘、沙质草地和农田土壤的含水率跃变区间分别为0.79%1.01%、1.14%1.72%和2.77%4.44%。(5)随土壤含水率上升,总输沙量大小排序发生变化:0.000.76%时流动沙丘>沙质草地>农田,0.76%1.35%时沙质草地>流动沙丘>农田,1.35%以上时农田>沙质草地>流动沙丘。
英文摘要	By conducting wind tunnel experiment on soils of three typical habitats(mobile dune,sandy grassland,and farmland)in the Horqin Sandy Land,the sand flow structure,sediment transport rate,and total sediment transport amount were analyzed under different soil water contents.The results showed that:(1)The sediment transport rate of three soil types decreased with the increase of height under different water content,and had a good exponential function relationship.(2)With the increase of water content,the average jump height of wind-quicksand for the soils of mobile dune and sandy grassland increased,and the ratio of sand transport rate of 0-12 cm to total sediment transport rate increased,while the soil of farmland showed the opposite trend.(3)The relationship between sediment transport amount and water content at different wind speeds for three types of soil can be described as an exponential function or a cubic function relationship.(4)Based on the variation degree of sediment transport amount with the increase of water content at different wind speeds,the water content can be divided into three sections:stable decline interval,jump interval,and weakening interval.The jump interval of soil water content of mobile dune,sandy grassland,and farmland was 0.79%-1.01%,1.14%-1.72%,and 2.77%-4.44%,respectively.(5)With the increase of soil water content,the order of total sediment transport amount changed among the soils,which was mobile dune >sandy grassland >farmland at the range of 0.00- 0.76%,sandy grassland >mobile dune >farmland with at 0.76%-1.35%,and farmland >sandy grassland >mobile dune with the water content above 1.35%.
中文关键词	风沙流 ; 含水率 ; 风蚀 ; 风洞 ; 科尔沁沙地
英文关键词	sand flow water content wind erosion wind tunnel Horqin Sandy Land
类型	Article
语种	中文
收录类别	CSCD
WOS类目	Meteorology & Atmospheric Sciences
CSCD记录号	CSCD:6936972
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/354591
作者单位	陈银萍, 兰州交通大学环境与市政工程学院, 兰州, 甘肃 730070, 中国. 曹雯婕, 兰州交通大学环境与市政工程学院, 兰州, 甘肃 730070, 中国. 余沛东, 兰州交通大学环境与市政工程学院, 兰州, 甘肃 730070, 中国. 杨欢, 兰州大学草地农业科技学院, 兰州, 甘肃 730020, 中国. 王旭洋, 中国科学院西北生态环境资源研究院, 兰州, 甘肃 730000, 中国. 李玉强, 中国科学院西北生态环境资源研究院, 兰州, 甘肃 730000, 中国.
推荐引用方式 GB/T 7714	陈银萍,曹雯婕,余沛东,等. 土壤含水率对风沙流结构及风蚀量的影响[J],2021,41(2):173-180.
APA	陈银萍,曹雯婕,余沛东,杨欢,王旭洋,&李玉强.(2021).土壤含水率对风沙流结构及风蚀量的影响.中国沙漠,41(2),173-180.
MLA	陈银萍,et al."土壤含水率对风沙流结构及风蚀量的影响".中国沙漠 41.2(2021):173-180.