中文摘要：

阻沙栅栏是一种重要的机械防沙形式，在发挥阻沙效益的同时也影响了周边的风沙地貌的发育。塔克拉玛干沙漠腹地垄间新月形沙丘的实地测量表明，受阻沙栅栏影响，其迎风侧低矮新月形的几何形体和走向都发生了明显的变化；沙丘形态的变化模式与其自身形体大小、栅栏的水平垂直距离、当地风信、栅栏的设置走向以及栅栏已有的阻沙量大小等因素有关。阻沙栅栏对迎风侧沙丘影响的临界距离是15H（H为栅栏高度），当阻沙栅栏走向与当地的主导风向夹角α〈45°时，栅栏对沙丘移动有侧导作用。栅栏迎风侧沙丘的形态变化与栅栏对迎风侧近地表风场的扰动作用有关。

英文摘要：

Sand blocking fence is an important form of physical sand control measures and has apparent effects on the aeolian geomorphology evolution of its periphery region while blocking drift-sand. The paper illustrated the surveyed results of some isolated barchans in the windward side of sand blocking fences settled in interdune area in the hinterland of the Taklimakan Desert. It found a phenomenon that barchans on interdune corridor of complex ridges evolved retrogradely. But sand blocking fences disturbed the retrograde evolution and movement of barchans and delayed the retrograde evolution of barchans on interdune corridor of complex ridges. The geometric morphology （ indexes such as height, length, width, grade of windward slope, wings＇ length, angular divergence of two wings, basal area and volume） and strike of barchans in the windward side of sand blocking fences changed greatly due to influence of sand blocking fences. The model of dunes＇ morphology change was related to these factors, self-morphological sizes of dunes, their horizontal-perpendicular distance to sand blocking fence, local wind regime, settied-strike of fence and the existing amount of sand blocked by fences, and so on. The paper also found a phenomena that the critical distance of sand blocking fences＇ influence to dunes in the windward side of fences was 15 folds of fences＇ height, and sand blocking fences can lead dunes in their windward side moving along the strikes of fences when the included angle between sand blocking fences and local dominating wind direction was less than 45 degree. The morphologic variation of barchans is decided by the changes of wind regime in their windward side of sand blocking fences.