底坡及植被分布下的坡面水流能量损失特征试验研究

发布时间：2018-04-18 18:17

  本文选题：坡面流 + 底坡　； 参考：《水电能源科学》2017年04期

【摘要】：为了揭示坡面水力侵蚀过程中水流能量变化规律,进而为水土保持研究提供理论依据,利用变坡水槽在变化水深条件下的坡面流模拟试验,分析了5种坡比及3种植被分布(植被走向与水流夹角15°、30°、45°)下坡面水流能量损失特征。结果表明,在相同植被分布条件下,沿程能量损失随坡比增大而增大,随水深增大而减小后趋于稳定;相同坡比时,植被走向与水流夹角30°时沿程能量损失大于夹角45°的值,坡比0%、0.5%、1.0%时植被走向与水流夹角15°的沿程能量损失介于30°、45°之间,坡比1.5%、2.0%时其沿程能量损失最大;不同植被走向角的沿程能量损失随水深增大变化趋势相同。
[Abstract]:In order to reveal the variation law of water flow energy in the process of slope hydraulic erosion and to provide theoretical basis for the study of soil and water conservation, the simulation experiment of slope flow in variable slope flume under the condition of varying water depth was carried out.The energy loss characteristics of slope flow under five slope ratios and three planting distributions (vegetation strike and flow angle 15 掳/ 30 掳/ 45 掳) were analyzed.The results show that under the same vegetation distribution condition, the energy loss along the course increases with the increase of slope ratio, decreases with the increase of water depth, and then becomes stable with the same slope ratio, and the energy loss along the course is greater than 45 掳at 30 掳angle between vegetation strike and water flow at the same slope ratio.The energy loss along the slope is between 30 掳and 45 掳when the vegetation strike and flow angle is 15 掳, and the energy loss along the slope is the largest at the slope ratio of 1.5 and 2.0, and the energy loss along the course of different vegetation strike angles is the same with the increase of water depth.
【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】：TV131.6;S157
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本文编号：1769503