浑善达克沙地公路沙害防治——高立式柳条沙障设置研究

以浑善达克沙地省际通道两侧公路防护带为试验区，黄柳（Salix gordejevii Y.L.Chang et Skv.）和小红柳（Salix microstachya Turcz.）在试验区及浑善达克沙地生长丰富，株高1.6-2.0 m，基经1.0-1.5 cm为自然生长最多的规格，是公路沙害防治中重要的沙障材料。由于柳条沙障类型、高度、规格、疏透度、设置方式等直接影响着工程防沙体系的稳定和防护效益，笔者通过对15、18、21、24、27和15、25、35、45根/m两组不同密度高立式柳条沙障分别于裸沙地和半固定沙地的风速测试，比较防风效益和地表粗糙度，结合防沙工程实践，提出25-30根/m为当地高立式柳条沙障设置的适宜密度。通过对多道高立式柳条沙障风速变化、防风效益和地表粗糙度的分析研究，认为当地高立式柳条沙障间距按上述密度应以4 m为宜，个别特殊位置可调整为2 m，如在风口处。

Research on Establishment of the High-banded Wicker Sand Barriers of Highway in Otindag Sandy Land

The test area was on the two sides of provincial highway channel of Otindag sand land in Inner Mongolia.Salix gordejevii Y.L.Chang et Skv.and Salix microstachya Turcz.are abundant in test area and Otindag sand land.Plant heights at 160-200 cm and base diameters at 1.0-1.5 cm are the largest in the natural communities.They are primary sand barrier materials to treat highway sand disaster.Due to the type,height,dimension,porosity and establishing way of the sand barriers which affect the stability and benefit of the preservation system composed of stable sand land and shifting sand land along the two sides of the road,the study determines the wind speed of two group of sand barriers with different densities of 15,18,21,24,27 15,25,35 and 45 sticks/meter in drifting sand land and semi-stable sand land,by studying the wind speed variety,resisting wind effects and roughness,the result shows that the density of 25-30 sticks/meter and 4 meters between two sand barriers are suitable for sand barriers establishing in the area.