植被排列方式及坡度对坡面流Fr影响的试验研究

发布时间：2018-08-29 11:54

【摘要】：为探究植被的排列方式及坡度大小对坡面流弗劳德数Fr的影响,以期揭示坡面流弗劳德数Fr的内在规律。利用人工模拟试验,系统研究了6个坡度、3种植物排列方向与水流方向呈不同走向角的条件下Fr与单位底面积的空间摩阻表面积K值的特征关系。表明在非淹没状态下,Fr与K值的关系为随K值的增大Fr呈现先减小后趋于平稳的趋势;Fr的取值随坡度的增大而增大;在一定的坡度范围内,同一坡度下,当Fr1时,同一K值下,走向角越大对应的Fr值越小,当Fr1时则相反;同一走向角下,在同一K值下,坡度越大对应的Fr就越大。得出在坡度一定的条件下,坡面植被的排列方式不同,弗劳德数Fr的取值也不相同;坡度是影响Fr取值范围的重要因素之一。
[Abstract]:In order to explore the influence of vegetation arrangement and slope size on the Fr of flow Froude number of slope flow, the inherent law of Fr number of flow on slope flow was revealed. The relationship between Fr and K value of spatial frictional resistance surface area per unit floor area was systematically studied under the condition of different strike angles of three species of plants with six gradient and three different directions of water flow by artificial simulation test. The results show that the relationship between Fr and K value in non-submerged state is that the value of Fr decreases first and then tends to steady with the increase of K value, and the value of Fr increases with the increase of slope, and in a certain slope range, under the same slope, when Fr1, the value of Fr increases under the same K value. The larger the strike angle, the smaller the corresponding Fr value, the opposite when Fr1 is, and the larger the slope is, the larger the corresponding Fr is at the same strike angle and the same K value. It is concluded that under the condition of certain slope, the value of Fr of Froude number is different with the arrangement of vegetation on the slope, and the slope is one of the important factors affecting the range of Fr.
【作者单位】：山东科技大学地球科学与工程学院;
【基金】：国家自然科学基金项目(40971021;41471025) 山东省自然科学基金项目(ZR2014DM004)~~
【分类号】：TV131

【相似文献】