Author(s): Marta Cabral; Jose Pedro Matos; Ana Pauseiro; Didia Covas
Linked Author(s): Dídia Isabel Cameira Covas, Marta Sofia Ferreira Cabral
Keywords: No Keywords
Abstract: The current paper aims at analysing the effect of different types, sizes and locations of anomalies in water distribution networks using transient pressure wave signals. Three time-frequency analyses are carried out to study the transient pressure features for each anomaly, including Fast Fourier Transform, Short-Time Fourier Transform and Continuous Wavelet Transform. Numerical and experimental data are used, considering different initial flow rates and initial sizes and locations of water leaks, entrapped air, and pipe blockages. Similar results for entrapped air are obtained for the three time-frequency analyses reinforcing that the presence of this anomaly leads to frequency components in the pressure wave signal and that, as the air pocket size increases, the main frequency tends to decrease as well as its amplitude. Obtained results from the frequency analyses can be integrated into classification/regression models to detect anomalies in water distribution networks and infer information about their properties (e. g., size and location).
Year: 2024