风蚀地貌形态与过程研究进展 - 地球科学与环境学报.PDF

31 1 Vol.31 No.1 2009 3 Journal of Earth Sciences and Environment Mar.2009 1, 2 2 王　帅 , 哈　斯 (1., 310020;2. , 100875) :、, , , , , ;, , 、、, , 。 , 、, GIS 。 :;;; :P931.3 　:A　:1 72- 5 1(2009)01-0100-0 Advances in the Study of Geomorphology and Process of Wind Erosion Landforms 1,2 2 WANG Shuai , HA Si (1.Zhej iang Instituteof Hydraulics and Estuary , H angzhou 310020, Zhej iang, China;2.School of Resources Science and Technology , State Key Laboratory of Earth Surf ace Processes and ResourceEcology, Beij ing ormal University , Beij ing 100875, China) Abstract:With global w arming and drought enhancement, the geomorphic process of w ind erosion landform s becomes one of the main surficial processes in arid and semi-arid areas.How ever, compared with wind accumulated landforms, less attention has been given to the w ind erosion landforms.This paper review s the processes of initiation, evolution, dynamics and geomorphology of yardangs and blowouts.Yardang and blow out are tw o main w ind erosion landforms, one is positive and one is negative.The generation of yardangs results f rom complex interactions between internal factors and external factors, and they are also influenced by weathering process, fluvial erosion and mass movement.Aerodynamic system produces differential pressures giving rise to vorticity w hich is one of the most frequent and important wind movements responsible for the erosion.Blow out geomorphology, dynamics and evolution are also examined.Blow outs are the threshold