榆靖沙漠高速公路格状沙障加植被综合防护效益调查分析

Highway of Yinlin-Jingbian Standard Shape Sand Barrier Adds the Benefit of Plants Synthesis Protection:An Investigation

格状沙障,是近地风沙流边界层防止风沙危害的一种经济实用、功能独特、效果显著而应用最为广泛的固沙措施。它增大了下垫面的粗糙度,明显降低了底层风速,进而减弱了输沙强度,使流沙表面得以稳定。调查结果表明,1.0m×1.0m,1.0m×1.5m草方格防沙效果都是显著的,1.0m×2.0m和2.0m×3.0m草鞋方格防风固沙效果差一些。

The standard shape sand barrier, a kind of economical, practical and its function is unique, its effect is remarkable, it is the most widespread solid sard measure, which prerent the sandstorni＇s harm near ground wind sand flow boundary. It has mcheased the roughness under the pad surface, reduced the first floor wind speed obviously, then weakened the sand intensity has lost, enabled the wind - drift sand surface to stabilize. The investigation result indicated that, the effect of the 1.0m×1.0m, 1.0m×1.5m grass check quards against the sand is remarkable, the effect of the 1.0m×2.0m, 2.0m×3.0m straw sandal check windproof solid sand is bad somewhat.