Sand fences are widely used to control sand deposition to initiate or stabilize dunes. Previous studies on sand fences are often focused on the porosity control of their trapping efficiency, however, there exists very little research on the fence height effect. We deployed fences with three heights and equal porosity at a field site near Jericoacoara, Brazil, and examined the variation of their topographic profile and trapping efficiency. We identified two stages of dune development around fences. During stage I, dune topographic profile area is proportional to the fence and dune height, and the trapping efficiency decreases substantially with time. During stage II, dunes continue to grow horizontally and the trapping efficiency decreases with time, but at a slower rate compared to stage I. Coarser sand tends to deposit close to the fence. The findings from this study can enhance the understanding of the complex wind-sand-structure interactions and provide insights for future dune recovery applications.

防沙栅广泛用于控制沙的沉积以引发或稳定沙丘。以前对防沙栅栏的研究通常集中在孔隙度对捕集效率的控制上，但是，对防沙栅栏高度影响的研究很少。我们在巴西Jericoacoara附近的现场部署了三个高度和孔隙率相等的围栏，并检查了其地形轮廓和诱集效率的变化。我们确定了围栏周围沙丘发展的两个阶段。在第一阶段，沙丘的地形轮廓面积与围栏和沙丘的高度成比例，捕获效率随时间而显着降低。在第二阶段，沙丘继续水平生长，捕集效率随时间降低，但与第一阶段相比速度较慢。粗砂倾向于沉积在围栏附近。