Effects of flow rate,shrinkage ratio and sediment content on head loss in triangular central measuring tanks
YUAN Changcong
TAO Hongfei
GUO Xingchen
WANG Fuyou
MAHEMUJIANG·Aihemaiti
JIN Peng
LI Junbo
Abstract：[Objective]The triangular central measuring tank is widely used in irrigation systems for flow measurement and sediment transport monitoring.However,head loss in the tank,influenced by hydraulic and sediment parameters,affects its measurement accuracy and energy efficiency.To improve design and operation of such tanks,this paper investigates the effects of flow rate,shrinkage ratio and sediment content on head loss and develops a predictive model for practical use.[Method]The experiments were conducted using six flow rates ranging from 0.031 to 0.093 m3/s,three shrinkage ratios ranging from 0.375 to 0.625,and five sediment concentrations ranging from 0.69 to 3.08 kg/m3.The experimental results were analyzed using the range analysis and the analysis of variance(ANOVA).A predictive model for the head loss was established using dimensional analysis.[Result]The head loss increased with increasing flow rate and sediment content but decreased as the shrinkage ratio increased.Among the three factors,the shrinkage ratio had the most significant impact on head loss,followed by flow rate,while sediment content had no significant effect on head loss.The proposed prediction model was accurate;the error between measured and predicted head loss ranged from-4.44％to 5.41％.[Conclusion]Our results established the dependence of head loss on flow rate,shrinkage ratio and sediment content in triangular central measuring tanks.The developed model can reliably predict head loss across a wide range of operational conditions,offering a guidance for hydraulic design and optimization of similar tanks under sediment-laden flow conditions.
Keywords：triangular central measuring sinkhead lossrange analysisanalysis of variancedimensional analysispredictive models
Publication Date：2025-08-30
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：9( 77-85 )