黄河班多水电站工程区荒草地坡面径流型态试验研究

发布时间：2018-05-01 02:10

  本文选题：黄河班多水电站 + 工程区　； 参考：《水土保持研究》2016年04期

【摘要】：雷诺数是坡面水流水力学重要参数之一,阐明坡面水流雷诺数变化的特征将有助于从动力学角度认识坡面侵蚀过程的内在机制。采用野外人工放水试验方法,对黄河班多水电站工程区荒草地坡面径流型态进行了试验研究,结果表明:(1)荒草地坡面水流型态判别指标雷诺数随供水过程的变化,在不同供水流量及不同坡度下都随供水历时的增长而先增大后趋于稳定,变化过程皆可用对数方程描述;(2)荒草地坡面水流平均雷诺数随供水流量及坡度的增大而增大,可分别用幂函数方程和指数方程描述,随坡度及供水流量的变化可用二元幂函数方程描述;(3)不同供水流量及不同坡度下,荒草地坡面水流雷诺数均小于500。次产流过程的坡面水流平均雷诺数变化为86~339,试验条件下工程区荒草地坡面水流型态均处于层流。
[Abstract]:Reynolds number is one of the important hydraulic parameters of slope flow. It will be helpful to understand the inherent mechanism of slope erosion process from the angle of dynamics by clarifying the characteristics of Reynolds number variation on slope surface. In this paper, the field artificial discharge test method is used to study the runoff patterns on the slope surface of the barren grassland in the Banduo Hydropower Station area of the Yellow River. The results show that the variation of Reynolds number, the discriminant index of the flow pattern on the slope surface of the wasteland, with the water supply process. Under different water supply flow and slope, the water supply increased first and then stabilized with the increase of water supply duration. The variation process can be described by logarithmic equation) the average Reynolds number of slope flow on barren grassland increases with the increase of water supply flow and slope. It can be described by power function equation and exponential equation respectively. The variation of slope and water supply flow can be described by binary power function equation.) under different water supply flow and different slope, the Reynolds number of waste grassland slope is less than 500. The average Reynolds number of the slope flow in the secondary runoff generation process is 86 ~ 339. Under the experimental conditions, the flow patterns on the slope surface of the barren grassland in the engineering area are all in laminar flow.
【作者单位】： 榆林学院生命科学学院;西北农林科技大学水土保持研究所黄土高原土壤侵蚀与旱地农业国家重点实验室;中国科学院水利部水土保持研究所;
【基金】：国家自然科学基金项目“应用三区土盘试验解析黄土坡面片蚀动力学过程”(41471230);国家自然科学基金项目“黄土坡面细沟侵蚀关键参数及其耦合关系试验研究”(41171227) 中国科学院重点项目“近百年黄土高原侵蚀环境与水沙变化”(KZZD-EW-04-03) 陕西省科技厅农业攻关项目“生态修复植物引种利用研究与示范”(2014K01-12-03) 黄土高原土壤侵蚀与旱地农业国家重点实验室开放项目(A314021402-1604) 陕西省高校科协青年人才托举计划资助;陕西省高校科协青年人才托举计划(20150108);陕西省高校科协青年人才托举计划(20150108)
【分类号】：S157
，

本文编号：1827251