摘要
通过对原型和室内模型试验资料的分析 ,证明了在黄土高原砒砂岩地区的支毛沟中 ,垂直于水流方向种植沙棘灌木植物作为拦沙的坝型框架材料是可行的 ,其机理在于利用植物干、枝、叶的分流、阻滞性能 ,分散了沟道集中的股流 ,降低了水流对沟床的剪切应力 ,拦截了洪水挟带的大量粗沙 ,形成了植物“柔性坝” ,同时又根据原型和室内试验资料得出的物理图形 。
The paper proved that seabuckthorn\|planting across the flowing direction as a kind of frame material for sediment retention dam was feasible in branch gully in soft rock region on loess plateau through analyzing the experimental data from field and indoor model.The mechanism is that plant stick,branch and leaves can scatter strand flow so as to reduce the stress of flow to gully bed and retained a lot of coarse sediment.Meanwhile,the paper established a theoretical frame of sediment retention by plant.
出处
《泥沙研究》
CSCD
北大核心
2003年第2期14-25,共12页
Journal of Sediment Research
关键词
黄土高原
沙棘植物
水沙运动
水流方向
剪切应力
沟床
黄河
拦沙试验
泥沙淤积
loess plateau
soft rock region
seabuckthorn plant “flexible dam”
water and sediment transportation
experimental research
