风沙地貌形态动力学研究进展

张正偲, 董治宝

Research Progress on Aeolian Geomorphology and Morphodynamics

Zhang zhengcai, Dong zhibao

图 3 横向沙丘背风侧气流特征（a）单个横向沙丘背风侧气流分区概念模型 [ 9 ] ;bPIV测得的典型横向沙丘背风侧气流结构 [ 40 ] 。H为沙丘高度;l为气流恢复距离;h为反向涡高度;L为沙丘背风坡投影长度;R为气流恢复点;#cod#x003b1;为背风坡角度;#cod#x003b2;为迎风坡角度
Fig.3 Characteristics of transverse leeward flow （a）Characteristics of transverse leeward flow a the conceptual model of the air flow characteristic at dune leeside of a single dune [ 9 ] ; （b）The PIV measured air flow structure at the dune leeside of a single dune [ 40 ] ; H . Dune height; l . Airflow restoration distance; h . Reverse vortex; L . Leeward projected length; R . Airflow restoration spot; #cod#x003b1; . Leeward slope angle; #cod#x003b2; . Windward slope angle