摘要
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。
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 psamrnophila＇s height and forest belt implantation. When the number of lines is more and the distance between behs is smaller,the protection effect is better,but the cost is bigger. The belt-shaped Salix psammophila checker- board made by sand willow can display the greatest cost benefit, when its specification is one beh and three lines. The benefit of one beh and two lines is lower. No matter how high of the belt, the benefit of one beh and one line is the lowest
出处
《水土保持学报》
CSCD
北大核心
2008年第2期42-46,共5页
Journal of Soil and Water Conservation
基金
沙区农田和草场风蚀防控与人居环境安全保障技术研究(2005BA517A05)
国家科技支撑课题(2006BAD26B03)
国家自然科学基金(30471422)
关键词
沙柳
沙障
防风固沙
荒漠化
粗糙度
输沙率
Salix psarnrnophila
checkerboard
reducing wind and stabilizing sand
desertification
roughness length
rate of sand transporting
