NEAR-SURFACE WIND FLOW AROUND DESERT SHRUBS

被引：16

作者：

LEE, JA

机构：

[1] Department of Geography, Texas Tech University, Lubbock, TX

来源：

PHYSICAL GEOGRAPHY | 1991年 / 12卷 / 02期

基金：

美国国家航空航天局;

关键词：

WIND; WIND EROSION; AEOLIAN GEOMORPHOLOGY; DESERTS;

D O I：

10.1080/02723646.1991.10642423

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Desert shrubs modify the pattern and magnitude of shear stress exerted on the ground surface by the wind. Wind profiles near the surface were measured at different locations around shrubs at six field sites. The profiles show that the pattern of wind flow around shrubs is complex and variable between sites. Estimates of the magnitude of surface shear stress around shrubs indicate that the presence of shrubs decreases shear stress on the surface and that the degree of protection is partly related to the density of shrubs on the surface.

引用

页码：140 / 146

页数：7

共 10 条

[1] Ash J.E., Wasson R.J., Vegetation and sand mobility in the australian desert dunefield, Zeitschrift Fur Geomorphologie Supplementband, 45, pp. 7-25, (1983)
[2] Bagnold R.A., The Physics of Blown Sand and Desert Dunes, (1941)
[3] Buckley R., The effect of sparse vegetation on the transport of sand by wind, Nature, 325, pp. 426-428, (1987)
[4] Greeley R., Iversen J.D., Aeolian processes and features at amboy lava field, california, Physics of Desertification, pp. 290-316, (1986)
[5] Hesp P.A., The formation of shadow dunes, Journal of Sedimentary Petrology, 51, pp. 101-112, (1981)
[6] Lee J.A., The role of desert shrub size and spacing on wind profile parameters, Physical Geography, 12, pp. 72-89, (1991)
[7] Lee J.A., The Effect of Desert Shrubs on Shear Stress from the Wind: An Exploratory Study., (1990)
[8] Marshall J.K., Assessing the protective role of shrub-dominated rangeland vegetation against soil erosion by wind, Proceedings of the 11Th International Grassland Conference, pp. 19-23, (1970)
[9] Marshall J.K., Drag measurements in roughness arrays of varying density and distribution, Agricultural Meteorology, 8, pp. 269-292, (1971)
[10] Wasson R.J., Nanninga P.M., Estimating wind transport of sand on vegetated surfaces, Earth Surface Processes and Land Forms, 11, pp. 505-514, (1986)

← 1 →