摘要
通过风洞模拟实验对砂砾土床面的风蚀可蚀程度进行了研究。结果表明,随风蚀进程的发展,砂砾土床面逐渐粗化,在特定风速下风蚀速率迅速降低,最终发展成稳定的戈壁风蚀面。26 m/s风速持续净风风蚀作用下,70 min后风蚀活动基本终止,床面最大侵蚀深度仅为1.8 mm。实验结果为西北干旱多风地区采用戈壁砂砾土覆盖地表有害物质,防止其风蚀输运而实现保护环境提供了有力的技术支持。
In arid regions of northwest China,due to the limitation of climate and economic,gravelly soil mulch will be an effective and economical way for preventing wind erosion of radioactive pollution soil on the surface.To provide design guidance,the wind erodibility of gravelly soil was studied by tunnel experiment.The results show that the gravel content in gravelly soil increases with wind erosion development,and the erosion rate decreases rapidly at any certain wind speed,finally the bed becomes into the steady gobi erosion plane.The activity of erosion is end after 70 min at 26 m/s wind speed,and the max depth of wind erosion is 1.8 mm.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2013年第S2期103-105,共3页
Environmental Science & Technology
关键词
砂砾土
风蚀
可蚀程度
风洞实验
gravelly soil
wind erosion
erodibility
wind tunnel
