Accurate Spectral Estimation Technique Based on Decimated Linear Predictor for Leak Detection in Waterworks.

Aimé Lay-Ekuakille,Paolo Visconti,Vito Telesca,Nicola Ivan Giannoccaro

doi:10.3390/s21062185

Abstract

Rural pipelines dedicated to water distribution, that is, waterworks, are essential for agriculture, notably plantations and greenhouse cultivation. Water is a primary resource for agriculture, and its optimized management is a key aspect. Saving water dispersion is not only an economic problem but also an environmental one. Spectral estimation of leakage is based on processing signals captured from sensors and/or transducers generally mounted on pipelines. There are different techniques capable of processing signals and displaying the actual position of leaks. Not all algorithms are suitable for all signals. That means, for pipelines located underground, for example, external vibrations affect the spectral response quality; then, depending on external vibrations/noises and flow velocity within pipeline, one should choose a suitable algorithm that fits better with the expected results in terms of leak position on the pipeline and expected time for localizing the leak. This paper presents findings related to the application of a decimated linear prediction (DLP) algorithm for agriculture and rural environments. In a certain manner, the application also detects the hydrodynamics of the water transportation. A general statement on the issue, DLP illustration, a real application and results are also included.

Highlights

To to calculate the position of the leak with respect to the close pressure sensor, it calculate the position of the leak with respect to the close pressure sensor, it is is viable viable to to find it find it using using an an uncertainty uncertainty approach
The goal of the paper was to demonstrate the usefulness of spectral analysis techniques based on advanced transforms, namely FDM, decimated signal diagonalization (DSD) and decimated Padé approximant (DPA), to increase precision and accuracy in retrieving leak positions and to control hydrodynamics in rural pipelines utilized for liquid transportation, notably in agriculture
For rural pipelines not under roads—with no physical noise impacting on signal acquisition—decimated linear prediction (DLP) is suitable given that there are no sudden variations in pressure

Summary

Introduction

Water quality, based on the tertiary process, is the main objective of many countries and cities. The availability of treated wastewater is connected to population distribution in a specified area or country. The increase in tertiary treated wastewater [1] favors its subsequent use as effluent in agriculture, city washing needs and in other activities such as golf. These applications do not need unrestricted irrigation after tertiary treatment. The use of sprinklers is critical to avoid contamination of close soil in the event of low quality of water. Spraying favors potential contamination of the aerial parts of plants with any eventual pathogenic elements present in the treated wastewater, with possible increased risk to the humans and animals using them

Objectives

Results

Conclusion