西北林学院学报2025，Vol.40Issue(5)：52-64,13.DOI:10.3969/j.issn.1001-7461.2025.05.06
库布齐沙漠北缘锁边林风沙流及其粒度参数垂直分布特征
Vertical Distribution Characteristics of Wind-Sand Flow and Grain Size Parameters in the Northern Margin of Kubuqi Desert
摘要
Abstract
In order to explore the influence of typical vegetation configuration on the vertical distribution of wind-sand flow and its grain size parameters in the northern margin of Kubuqi Desert,five shrub vegetation configurations and four arbor-shrub vegetation configurations were selected.The vertical distribution char-acteristics of sand grain size and grain size parameters of wind-sand flow in 0-60 cm height near the surface were analyzed by combining field wind-blown sand observation and indoor analysis.It provides a theoretical reference for the monitoring and renovation of wind and sand in the northern margin of Kubuqi Desert.Results show that:1)The wind-sand flow structure of each vegetation configuration follows a pow-er function distribution(R2＞0.78)under different indicative wind speeds(7.5,8.7,10.2,11.3 m/s),and the sediment transport is concentrated in the 0-10 cm height layer,accounting for about 90.99％on aver-age.The proportion of medium sand,fine sand and very fine sand in the 0-10,10-30 and 30-60 cm lay-ers of different vegetation configurations is the largest,with an average proportion of 57.94％,48.16％and 47.51％,respectively.With the increase of vegetation coverage,it tends to decrease,increase and increase.2)The sorting of wind-sand flow in each vegetation configuration changed from good to medium in the height of 0-20 cm,from medium to good(0.5-1.06)in the height of 20-60 cm,and the skewness changed from symmetry to negative skewness(0.248-0.603)when the skewness was higher than 6 cm,and the kurtosis was medium.3)In the shrub configuration with vegetation coverage higher than 25％and the arbor-shrub configuration with vegetation coverage higher than 20％,the average particle size of the wind-sand flow was significantly positively correlated with the sorting coefficient,skewness and kurtosis(P＜0.01).The sorting coefficient was positively correlated with the skewness(P＜0.01),and the skew-ness was negatively correlated with the kurtosis(P＜0.01).In the shrub configuration with vegetation coverage lower than 25％and the arbor-shrub configuration with vegetation coverage lower than 20％,the correlation was weak or negative.Vegetation configuration significantly affects the structure and grain size parameters of wind-sand flow.Combined with the concept of sustainable development,it is suggested that the shrub configuration with vegetation coverage of 25％—30％and the arbor-shrub configuration with vegetation coverage of 20％—25％should be mainly adopted in the construction of local edge-locking forest.关键词
库布齐沙漠/锁边林/风沙流结构/粒度参数/垂直分布Key words
Kubuqi Desert/edge-locked forest/wind-sand flow structure/granularity parameters/vertical distribution分类
农业科技引用本文复制引用
解秉林,左合君,闫敏,席成,柴茵超..库布齐沙漠北缘锁边林风沙流及其粒度参数垂直分布特征[J].西北林学院学报,2025,40(5):52-64,13.基金项目
内蒙古自治区防沙治沙科技创新重大示范工程"揭榜挂帅"项目(2024JBGS0019) （2024JBGS0019）
国家林草局林草科技创新团队项目(BR241301) （BR241301）
内蒙古自治区高等学校创新团队项目(NMGIRT2408). （NMGIRT2408）
