摘要
无喉堰量水槽因其量水精度高、结构简单、过水能力大、上游壅水低等诸多优点而成为最适合于农业灌区应用的量水建筑物。目前,利用无喉堰测量流量已经在部分农业灌区得到应用。但在调查中发现,利用无喉堰量水尚没有应用规范的计算公式,而且各种情况下出流对流量计量的影响尚未明确。为此,笔者对无喉堰自由出流和淹没出流2种状态的流量计算公式进行了理论推导给出了修正的经验公式。
Possessing such following characteristics as high measuring accuracy,simple design,strong water-passing capacity and low backwater in the upper stream,the cutthroat measuring flume is the best measuring structure applied in the irrigation district.At present,it is used to measure the discharge in some irrigation districts.However,through the investigation,we can＇t find the standard calculation formula for the cutthroat flume and the impact of outflow on flows in all situations has not been made clear.Under the conditions of free outflow and submerged outflow,this paper theoretically derives the formula of flow calculation and presents the revised formula.
出处
《安徽农业科学》
CAS
北大核心
2011年第34期21499-21500,21503,共3页
Journal of Anhui Agricultural Sciences
关键词
无喉堰
流量
量水建筑物
自由出流
淹没出流
Cutthroat flume
Flow
Measuring structure
Free outflow
Submerged outflow
