MA Chunyan,WANG Zhanli,LU Shaojuan,et al.Experimental Study of Overland Flow Pattern in the Banduo Hydropower Station Project Area of the Yellow River[J].Research of Soil and Water Conservation,2016,23(04):6-9.
黄河班多水电站工程区荒草地坡面径流型态试验研究
- Title:
- Experimental Study of Overland Flow Pattern in the Banduo Hydropower Station Project Area of the Yellow River
- Keywords:
- Banduo hydropower station of Yellow River; project area; waste grassland; flow pattern; Reynolds number
- 分类号:
- S157
- 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 hydraulics parameters. Clarifying the variation of slope flow Reynolds number will help recognize the internal mechanism of slope erosion process from the point of dynamics. On waste grassland in the Banduo hydropower station project area of the Yellow River, the overland flow patterns are studied by artificial scouring experiment under different slope gradients and water supply discharge. The results show that:(1) the overland flow Reynolds number on the waste grassland, a Judging index of flow pattern, changes under different water supply discharges and different slopes rose first and stabilized finally, the logarithmic equation can be used to describ the process; (2) the average overland flow Reynolds number increased with increase of water supply discharge and slope gradients, which can be described by power function equation and exponential equation, respectively, and to both of the two factors, by a dual power function equation; (3) the overland flow Reynolds number on the waste grassland is less than 500 under different water supply discharge and different slopes. The average Reynolds number varies between 86 and 339, indicating that overland flow in waste grassland is laminar flow on the project area.
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相似文献/References:
[1]张孝中,王莎,申楠,等.黄河班多水电站工程区荒草地坡面水流含沙量变化过程试验研究[J].水土保持研究,2014,21(02):72.
ZHANG Xiao-zhong,WANG Sha,SHEN Nan,et al.Experimental Study on Variations of Sediment Concentration in Water Flow on Waste Grassland in Banduo Hydropower Station Construction Area of Yellow River[J].Research of Soil and Water Conservation,2014,21(04):72.
备注/Memo
收稿日期:2015-11-15;改回日期:2015-12-22。
基金项目: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）
作者简介:马春艳(1983-),女,陕西榆林人,工程师,硕士,主要从事土壤侵蚀与水土保持教学与研究。E-mail:nldmcy2004@163.com
通讯作者:王占礼(1960-),男,陕西榆林人,博士,研究员,博士生导师,主要从事土壤侵蚀过程及预报模型研究。E-mail:zwang@nwsuaf.edu.cn