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Authors
Abstract(s)
Em um cenário de crescente escassez hídrica no sul da Europa, esta tese investiga como a
aceitação social da reutilização de água residual tratada contribui para fortalecer a capacidade
adaptativa e responder aos impactos das alterações climáticas sobre os recursos hídricos. A
pesquisa assume a reutilização de água como uma ferramenta estratégica de adaptação ao se
posicionar como fonte alternativa capaz de ampliar a disponibilidade hídrica.
A aceitação social foi utilizada como base teórica para compreender as interações entre os
atores sociais na construção de soluções de adaptação, assim como os fatores que influenciam
o processo. A partir desta abordagem, desenvolveu-se um quadro analítico composto por
categorias para avaliar os elementos que promovem ou dificultam a adoção da reutilização.
O estudo adota Lisboa como caso de análise devido à implementação recente de projetos
de reutilização para rega de espaços verdes e à ambição de expansão. Para a análise, foram
utilizadas três fontes de dados: políticas públicas de adaptação e reutilização ao nível europeu,
nacional e local; discussões das Comunidades de Prática para a água (projeto B-WaterSmart);
e entrevistas com atores-chave do setor.
Os resultados revelam que, embora haja ainda resistência à reutilização, particularmente
em usos mais sensíveis, o uso não potável tem amplo apoio entre os atores do setor. Fatores
como a percepção de escassez hídrica, confiança na qualidade da água reutilizada, custos de
implementação, articulação interinstitucional e participação pública emergiram como
influências centrais. Em resposta ao diagnóstico, a pesquisa aponta para a necessidade de
amadurecimento do modelo de negócio em construção no município e para maior envolvimento
do público alargado, com vista a expansão da reutilização, especificamente na Área
Metropolitana de Lisboa (AML). Esta abordagem integrada é apresentada como uma
oportunidade para fortalecer a resiliência hídrica e avançar na resposta à crise climática em
Portugal.
In a scenario of worsening water scarcity in southern Europe, this thesis explores how the social acceptance of water reuse contributes to strengthen the adaptive capacity of a territory, while responding to the impacts of climate change on water resources. The research adopts the premise that reusing treated wastewater represents a strategic adaptation tool, by positioning itself as an alternative source capable of increasing water availability. Social acceptance was used as a theoretical basis to understand the interactions between the various social actors in the construction of adaptation solutions, as well as the factors that influence the process. Based on this approach, an analytical framework made up of categories was developed to assess the elements that promote or hinder the adoption of water reuse. Lisbon was adopted as a case study, due to the recent implementation of reuse projects for watering green spaces and the ambition to expand water reuse. Three sources of data were used: public policies on adaptation and reuse at European, national and local levels; discussions from the Communities of Practice for water (B-WaterSmart project); and interviews with key stakeholders in the water sector. The results reveal that, while there is still resistance to water reuse, particularly for more sensitive uses, non-potable water reuse has broad support among stakeholders. Factors such as perceptions of water scarcity, trust in the quality of water for reuse (ApR), implementation costs, inter-institutional articulation and public participation emerged as central influences. Consequently, the research points to the need to further develop the business model under construction in the municipality, as well as to a greater involvement of the wider public, with a view to expanding reuse practices throughout the territory. This integrated approach is presented as an opportunity to strengthen water resilience and the response to the climate crisis in Portugal.
In a scenario of worsening water scarcity in southern Europe, this thesis explores how the social acceptance of water reuse contributes to strengthen the adaptive capacity of a territory, while responding to the impacts of climate change on water resources. The research adopts the premise that reusing treated wastewater represents a strategic adaptation tool, by positioning itself as an alternative source capable of increasing water availability. Social acceptance was used as a theoretical basis to understand the interactions between the various social actors in the construction of adaptation solutions, as well as the factors that influence the process. Based on this approach, an analytical framework made up of categories was developed to assess the elements that promote or hinder the adoption of water reuse. Lisbon was adopted as a case study, due to the recent implementation of reuse projects for watering green spaces and the ambition to expand water reuse. Three sources of data were used: public policies on adaptation and reuse at European, national and local levels; discussions from the Communities of Practice for water (B-WaterSmart project); and interviews with key stakeholders in the water sector. The results reveal that, while there is still resistance to water reuse, particularly for more sensitive uses, non-potable water reuse has broad support among stakeholders. Factors such as perceptions of water scarcity, trust in the quality of water for reuse (ApR), implementation costs, inter-institutional articulation and public participation emerged as central influences. Consequently, the research points to the need to further develop the business model under construction in the municipality, as well as to a greater involvement of the wider public, with a view to expanding reuse practices throughout the territory. This integrated approach is presented as an opportunity to strengthen water resilience and the response to the climate crisis in Portugal.
Description
Keywords
Reutilização de água Aceitação social Adaptação climática Alterações climáticas Uso da ApR