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GIS based approach for risk analysis of water distribution networks: Case study in water utility in Portugal
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Resumo(s)
As Entidades Gestoras (EG) de abastecimento de água enfrentam diversos desafios na
gestão e manutenção de seus ativos. Em meio à variedade de metodologias disponíveis
para a elaboração de planos de reabilitação, a matriz de risco se destaca como uma
abordagem versátil e estruturada. No entanto, sua eficácia pode ser prejudicada por
desafios inerentes à sua implementação.
Neste contexto, esta dissertação aborda a tarefa de automatizar os cálculos de
avaliação de risco em uma das principais EG de Portugal. Apesar da robustez da
metodologia existente, seu cálculo é realizado manualmente, resultando em diversas
limitações e desafios, como um elevado tempo gasto para estruturar os cálculos,
suscetibilidade a erros, escalabilidade limitada e falta de padronização. Para isso foi
selecioando o software de geoprocessamento open source QGIS e sua ferramenta Model
Designer, no qual foi desenvolvido um modelo automatizado do cálculo da matriz. O
modelo e abordagem criada acelera o processo de cálculo, transformando uma tarefa
que leva dias em uma operação rápida, com visualizações gráficas para os resultados.
Um Manual do Usuário foi elaborado para auxiliar os usuários principais e promover
a disseminação do conhecimento em toda a organização.
A contribuição deste estudo prático e aplicável é ajudar a EG de estudo a superar
as deficiências do método manual para cálculo de risco. A principal relevância está em
permitir uma alocação otimizada de recursos e análises operacionais mais assertivas,
apoiando a tomada de decisões e permitindo uma gestão de ativos mais eficiente.
Water utilities face several challenges in effectively managing and maintaining their critical infrastructure. Amidst the array of methodologies available for elaborating optimal pipe rehabilitation plans, the risk matrix is a versatile and structured approach. However, its effectiveness can be hindered by challenges inherent to its implementation. Within this context, this dissertation tackles the task of automating risk assessment calculations within one of Portugal’s prominent water utilities. The core objective is establishing an automated pipeline for the utility’s risk assessment. It has a robust methodology, but its manual calculation presents several limitations and challenges, such as time constraints, error susceptibility, limited scalability and lack of standardization. Leveraging the capabilities of the open-source geoprocessing software QGIS, specifically its Model Designer tool, a reliable and efficient model was conceived. This approach accelerates the calculation process, transforming it from a task spanning days into a prompt operation, and also displays visual outputs for enhanced insights. A User Guide was elaborated to aid primary users and foster knowledge dissemination across the organization. The contribution of this practical and applicable study is helping the water utility overcome the shortcomings of manual risk calculation methods. Central relevance is to enable optimized resource allocation and incisive operational analysis, supporting decision-making and allowing enhanced asset management.
Water utilities face several challenges in effectively managing and maintaining their critical infrastructure. Amidst the array of methodologies available for elaborating optimal pipe rehabilitation plans, the risk matrix is a versatile and structured approach. However, its effectiveness can be hindered by challenges inherent to its implementation. Within this context, this dissertation tackles the task of automating risk assessment calculations within one of Portugal’s prominent water utilities. The core objective is establishing an automated pipeline for the utility’s risk assessment. It has a robust methodology, but its manual calculation presents several limitations and challenges, such as time constraints, error susceptibility, limited scalability and lack of standardization. Leveraging the capabilities of the open-source geoprocessing software QGIS, specifically its Model Designer tool, a reliable and efficient model was conceived. This approach accelerates the calculation process, transforming it from a task spanning days into a prompt operation, and also displays visual outputs for enhanced insights. A User Guide was elaborated to aid primary users and foster knowledge dissemination across the organization. The contribution of this practical and applicable study is helping the water utility overcome the shortcomings of manual risk calculation methods. Central relevance is to enable optimized resource allocation and incisive operational analysis, supporting decision-making and allowing enhanced asset management.
Descrição
Dissertation presented as the partial requirement for obtaining a Master's degree in Geographic Information Systems and Science, specialization in Geographic Information Systems and Science
Palavras-chave
Sistemas de Informações Geográficas Sistemas de distribuição de água Matriz de risco Plano de reabilitação de condutas Geographic Information System Water distribution system Risk matrix Pipe rehabilitation plans