浑善达克沙地黄柳活沙障防风固沙效益的研究

STUDY ON THE PLANTING AND EFFECTS OF WIND-BREAKING AND SAND-FIXATION OF LIVING SALIX GORDEJEVII BARRIER IN HUNSHANDAKE SANDLAND

通过锡林郭勒盟多伦县大骆驼厂村境内浑善达克沙地不同规格黄柳活沙障内风速和积沙量的野外观测,并不同规格黄柳活沙障对风速的降低效果、地面粗糙度(Z0)和积沙量进行了系统的研究分析。结果表明:设置黄柳活沙障2 a后,下垫面粗糙度显著增大,风速明显减弱,其顺序为:4m×4m网格沙障>6m×6m网格沙障>间距4m带状沙障>间距6m带状沙障>裸露流沙。当旷野平均风速为5.1m/s时,只有裸露沙地和2个带状沙障内起沙,其它2种规格沙障内都不起沙。

Based on the observation of the wind-speed and Sand-volume of different sizes of Living Salix gordejevii Barrier on field,in the Duolun country,Daluotuochang Village,and the benefit of wind-breaking and sand-binding of different sizes of Living Salix gordejevii,Surface roughness（Z0） and Sand-volume was systematically analyzed.The results show that： After the Salix gordejevii being planted two years,the ground roughness increasedand,wind-speed slowed down obviously in the area with sand-barrier.The sequence of the barrier sizes corresponding to the sand fixation effects was：4m×4m〉6m×6m〉4m〉6m〉moving sand.When the wind-speed in field was 5.1m/s,the sand moving were occurred in moving sands,6m and 4m Salix gordejevii sand-barrier area,and had not been observed in other two types of sand-barrier areas.