带状沙柳沙障的防风固沙效益研究

研究测定了不同高度、不同规格的9种带状沙柳沙障对风速、地表粗糙度和近地表输沙率的影响。结果表明:带状沙柳沙障的防护效益与沙障的高度和规格有直接关系。行数越多、带距越小,防护效果越好,但是成本也越大。发挥最大成本效益的带状沙柳沙障规格为三行一带,带高1.5 m,行距1.5 m,带距10.5 m;其次为两行一带,带高1.5 m,行距1.5 m,带距7.5 m;再次为三行一带,带高1 m,行距1 m,带距7 m。一行一带的沙障,不管高度如何,成本效益都不理想。

Effect of Zonal Willow Salix psammophila Checkerboard on Reducing Wind and Stabilizing Sand

The research measuresed 9 kinds of influences that Salix psammophila checkerboard to lose wind velocity,roughness length and the rate of sand transporting of the dissimilarity height,different specification.The result express: the protection benefit of zonal willow Salix psammophila checkerboard has direct relationship of Salix psammophila's height and forest belt implantation. When the number of lines is more and the distance between belts is smaller,the protection effect is better,but the cost is bigger.The belt-shaped Salix psammophila checkerboard made by sand willow can display the greatest cost benefit,when its specification is one belt and three lines.The benefit of one belt and two lines is lower.No matter how high of the belt,the benefit of one belt and one line is the lowest.