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Listar por autor "Ayala Cabrera, David"

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3D model evolution of a leak based on GPR image interpretations

Ocana-Levario, S.J.; Ayala Cabrera, David; Izquierdo Sebastián, Joaquín; Pérez García, Rafael (IWA Publishing, 2015-12)

This paper presents some aspects of the time propagation of underground water leakage in controlled laboratory conditions using a drilled polyvinyl chloride (PVC) pipe and interpreting ground penetrating radar (GPR) images. ...
3D Representation of (Buried) Water Supply Elements using Pre-Processed GPR Images

Ayala Cabrera, David; Ocaña Levario, Silvia Janeth; Izquierdo Sebastián, Joaquín; Pérez García, Rafael (2015)

[EN] In this paper, a ground penetrating radar (GPR) is used as a non-destructive method to assess the buried elements of water supply systems (WSSs). The aim is the detection of various pipe materials (such as plastic ...
Advancing towards semi-automatic labeling of GPR images to improve visualizations of pipes and leaks in water distribution networks using multi-agent systems and machine learning techniques

Stanton, Gemma; Ayala-Cabrera, David (Editorial Universitat Politècnica de València, 2024-03-06)

[EN] Critical infrastructures such as water distribution networks (WDNs) require reliable and affordable information at a reasonable cost to address challenges that can negatively affect their operation. Inadequate knowledge ...
Analysis of online pressure for resilience phase characterisation of leakages/burst events

Hoseini Ghafari, Sotudeh; Francés-Chust, Jorge; Piller, Olivier; Ayala-Cabrera, David (Editorial Universitat Politècnica de València, 2024-03-06)

[EN] While operating a water distribution network (WDN), it is essential to prepare the system to face with intentional (e.g., cyber-physical attack) or unintentional (e.g., pipe leakage/burst) adverse events or other ...
Análisis, caracterización y modelación 3D de fugas de agua en sistemas de abastecimiento de agua mediante imágenes de GPR

Ocaña Levario, Silvia Janeth (Universitat Politècnica de València, 2021-03-04)

[ES] Los esfuerzos que hacen los países, en conjunto con organizaciones mundiales, tales como IWA (por International Water Association), ONU-Agua y OMS (Organización Mundial de la Salud), para mitigar el impacto ambiental ...
Battle of the Attack Detection Algorithms: Disclosing Cyber Attacks on Water Distribution Networks

Taormina, R.; Galelli, S.; Tippenhauer, N. O.; Salomons, E.; Ostfeld, A.; Eliades, D. G.; Aghashahi, M.; Sundararajan, R.; Pourahmadi, M.; Banks, M. K.; Brentan, Bruno M.; Campbell-Gonzalez, Enrique; Lima, G.; Manzi, D.; Ayala Cabrera, David; Herrera Fernández, Antonio Manuel; Montalvo Arango, Idel; Izquierdo Sebastián, Joaquín (American Society of Civil Engineers, 2018)

[EN] The BATtle of the Attack Detection ALgorithms (BATADAL) is the most recent competition on planning and management of water networks undertaken within the Water Distribution Systems Analysis Symposium. The goal of the ...
Caracterización de tuberías enterradas para redes de abastecimiento en servicio mediante el análisis de imágenes obtenidas con radar de subsuelo (Ground Penetrating Radar - GPR)

Ayala Cabrera, David (Universitat Politècnica de València, 2012-01-19)

En este trabajo se evalúa la viabilidad del método propuesto de análisis de radargramas para la caracterización de los componentes del sistema de abastecimiento en servicio, con la realización de ensayos de laboratorio, ...
Characterization of components of water supply systems from GPR images and tools of intelligent data analysis

Ayala Cabrera, David (Universitat Politècnica de València, 2015-12-29)

[EN] Over time, due to multiple operational and maintenance activities, the networks of water supply systems (WSSs) undergo interventions, modifications or even are closed. In many cases, these activities are not properly ...
Digitalization of Water Distribution Systems in Small Cities, a Tool for Verification and Hydraulic Analysis: A Case Study of Pamplona, Colombia

Bonilla, Carlos; Brentan, Bruno; Montalvo, Idel; Ayala-Cabrera, David; Izquierdo Sebastián, Joaquín (MDPI AG, 2023-11)

[EN] Digitalization in water networks is essential for the future planning of urban development processes in cities and is one of the great challenges faced by small cities regarding water management and the advancement ...
Dynamic management of water supply systems: A tool to build scenarios by merging GPR surveys and augmented reality

Ayala Cabrera, David; Herrera Fernández, Antonio Manuel; Izquierdo Sebastián, Joaquín; Pérez García, Rafael; Ocaña-Levario, S. (E.W. Publications, 2013)

[EN] Water Supply Systems (WSS) are extremely complex assets. Suitable knowledge of their components and the changes they undergo are necessary to control and productively manage these systems. Currently, non-destructive ...
Error analysis of some demand simplifications in hydraulic models of water supply networks

Izquierdo Sebastián, Joaquín; CAMPBELL GONZALEZ, ENRIQUE; Montalvo Arango, Idel; Pérez García, Rafael; Ayala Cabrera, David (Hindawi Publishing Corporation, 2013)

Mathematical modeling of water distribution networks makes use of simplifications aimed to optimize the development and use of the mathematical models involved. Simplified models are used systematically by water utilities, ...
GPR data analysis using multi-agent and clustering approaches: A tool for technical management of water supply systems

Ayala Cabrera, David; Herrera Fernández, Antonio Manuel; Izquierdo Sebastián, Joaquín; Pérez García, Rafael (Elsevier, 2014-04)

In this paper a combination of the multi-agent paradigm and a very well known clustering technique is used for unsupervised classification of subsoil characteristics working on a collection of ground penetrating radar ...
GPR image analysis to locate water leaks from buried pipes by applying variance filters

Ocaña-Levario, Silvia Janeth; Carreño-Alvarado, Elizabeth Pauline; Ayala Cabrera, David; Izquierdo Sebastián, Joaquín (Elsevier, 2018)

[EN] Nowadays, there is growing interest in controlling and reducing the amount of water lost through leakage in water supply systems (WSSs). Leakage is, in fact, one of the biggest problems faced by the managers of these ...
GPR image interpretation advancement for smarter technical management of water leakage in urban water infrastructures

Ayala-Cabrera, David; Izquierdo Sebastián, Joaquín (Society of Photo-Optical Instrumentation Engineers (SPIE), 2021-10-06)

[EN] This paper combines such powerful non-destructive technique as ground penetrating radar (GPR) with intelligent data analysis in order to acquire new knowledge on mapping/monitoring/verification systems aimed at initially ...
GPR-based water leak models in water distribution systems

Ayala Cabrera, David; Herrera Fernández, Antonio Manuel; Izquierdo Sebastián, Joaquín; Ocaña Levario, Silvia Janeth; Pérez García, Rafael (MDPI, 2013-12)

[EN] This paper addresses the problem of leakage in water distribution systems through the use of ground penetrating radar (GPR) as a nondestructive method. Laboratory tests are performed to extract features of water leakage ...
Hybrid optimization proposal for the design of collective on-rotation operating irrigation networks

Lapo Pauta, Carmen Mireya; Pérez García, Rafael; Izquierdo Sebastián, Joaquín; Ayala Cabrera, David (Elsevier, 2017)

[EN] Hybrid models have been used in many engineering applications in order to find better solutions and to reduce project costs. In this paper a methodology for the optimal design of collective working shift irrigation ...
Identification of Buried Pipes Using Thermal Images and Data Mining

Carreño Alvarado, Elizabeth Pauline; Ayala Cabrera, David; Pérez García, Rafael; Izquierdo Sebastián, Joaquín (Elsevier: Creative Commons Attribution Non-Commercial No-Derivatives License, 2014)

Knowledge of buried infrastructure is essential for management and decision-making in water utility companies. To pinpoint the benefits of thermography, a case study was conducted, namely, thermal images were taken under ...
Improving Water Supply System Components Visualization into GPR Images

Ayala Cabrera, David; Ocana-Levario, Silvia J.; Izquierdo Sebastián, Joaquín; Pérez García, Rafael (Athens Institute for Education and Research (ATINER)., 2014-12)

[EN] This work focuses on the use of easy-to-apply procedures that allow rapid visualization of components of water supply systems (WSSs) by non-highly qualified personnel. We use a methodology that does not alter the ...
Label Propagation Algorithm Based Methodology for Water Supply Networks Sectorization

CAMPBELL GONZALEZ, ENRIQUE; Ayala Cabrera, David; Izquierdo Sebastián, Joaquín; Pérez García, Rafael; Tavera, Mario (Interlude, 2014)

The increasing pressure over water resources has raised the need to establish procedures to efficiently manage water supply networks (WSN). An example of such procedures is the sectorization of networks either by ...
Location of buried plastic pipes by multi-agent support based on GPR images

Ayala Cabrera, David; Herrera Fernández, Antonio Manuel; Izquierdo Sebastián, Joaquín; Pérez García, Rafael (Elsevier, 2011-12)

This work focuses on the generation of tools to aid inspection and identify buried plastic pipes in water supply systems (WSS). In our study we use ground penetrating system (GPR) images as a non-destructive method of ...