Contribuição da deteção remota e dos SIG na estimação do consumo de água em espaços verdes irrigados para os meses de verão no período 2013-2023: caso de estudo a cidade de Faro (Portugal)

• Autor(a) principal: Martins, Fernando Miguel Granja
• Data de Publicação: 2024
• Outros Autores: Fernandez, Helena Maria
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Revista Geama
• Texto Completo: https://www.journals.ufrpe.br/index.php/geama/article/view/6664
• topic: Espaços verdes; Índices de vegetação; Temperatura de Superfície; Índice de Humidade; Evapotranspiração de referência; Algarve; Consumo de água

Mediterranean cities' green spaces are crucial in sustainability and urban organization. They are essential to promoting health, population well-being, preserving biodiversity, and adapting to climate change. In this context, the study aims to estimate the water consumption in the irrigated green spaces of Faro, Portugal, mainly occupied by grass, during the summer months from 2013 to 2023. This estimation is based on Reference Evapotranspiration and Landsat 8 satellite images from Google Engine. The Land Surface Temperature was determined using Thermal Band 10 and the Normalized Difference Vegetation Index. Irrigated green spaces were spatially identified through the Normalized Difference Water Index. The results showed that water use for irrigation was relatively low during the analyzed period. Even in 2023, when plant water needs were higher, only 4% of the total daily water consumption in Faro was allocated for irrigation. Therefore, water consumption aligns with the challenges of climate change. Considering that the municipality has only 5% of available green areas, it is imperative to raise awareness among stakeholders to implement more urban green spaces, preferably with native plants replacing lawns, to minimize irrigation needs