A buried gas pipeline leakage source strength estimation method and system

Abstract

This invention relates to the field of urban gas pipeline network safety monitoring and risk early warning technology, specifically to a method and system for estimating the leakage source strength of buried gas pipelines. The method includes acquiring time-series concentration data of monitoring points and the transmission distance between the monitoring points and potential leakage sources; filtering the time-series concentration data to extract quasi-steady-state concentration values; constructing a spatial transmission inverse model that integrates geometric diffusion correction and medium damping attenuation based on a steady-state diffusion physical field; calculating the equivalent source strength estimate at the potential leakage source based on the quasi-steady-state concentration value using the spatial transmission inverse model, applying physical saturation constraints, and mapping it to a leakage risk level according to a preset threshold. This invention, by constructing a two-factor spatial transmission inverse model and combining quasi-steady-state extraction and physical constraints, can inversely estimate the leakage source strength using sparse monitoring data from a single point, effectively overcoming misjudgments caused by diffusion attenuation in complex underground environments, and significantly improving the accuracy and timeliness of leakage risk identification.

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