LINCungang,QINJiagui,MABaosong.Calculation Method of Leakage Flow Rate in Buried Pressurized Water Pipelines[J].China Water & Wastewater,2026,42(10):1-8.
Calculation Method of Leakage Flow Rate in Buried Pressurized Water Pipelines
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第42卷
Number:
第10期
Page:
1-8
Column:
Date of publication:
2026-05-17
- Keywords:
- leakage; pressurized pipelines; pipeline outflow; water supply and drainage system; mathematical model
- Abstract:
- For the issue of outflow from damaged pressurized pipelines, existing research has established a relatively complete system of outflow equations, providing theoretical support for the analysis of pipeline leakage mechanisms and prevention design. The commonly used equations for calculating the outflow rate of fluid through a specified damaged orifice in a pipeline include the orifice equation, the leakage equation, and the fixed and variable area discharges (FAVAD) equation. Among them, the orifice equation is typically used to calculate the inflow or outflow rate of fluid at atmospheric pressure through small openings. The leakage equation is more suitable for cases where the damaged orifice has an irregular shape or when dealing with high-pressure, high-velocity flow systems. The FAVAD equation is widely applied to the calculation of leakage flow in pressurized pipelines and water distribution networks. This paper systematically reviews the research progress on leakage mechanisms in pressurized pipelines and presents modified outflow calculation models that consider factors such as hydraulic head, damaged orifice shape parameters, pipeline material properties, and leakage medium characteristics. In addition, the advantages and limitations of these outflow equations are analyzed, along with recommendations for future research.
Last Update:
2026-05-17