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Water and Energy Efficiency Assessment in Urban Green Spaces

Author

Listed:
  • Laura Monteiro

    (CERIS–Civil Engineering Research and Innovation for Sustainability, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal)

  • Raquel Cristina

    (CERIS–Civil Engineering Research and Innovation for Sustainability, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal)

  • Dídia Covas

    (CERIS–Civil Engineering Research and Innovation for Sustainability, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal)

Abstract

Urban green spaces can be intensive water and energy consumers in the cities, particularly in water scarce regions. Though a very efficient use of such resources is necessary, tools for assessing both water and energy consumption and efficiency are not available. In this paper, a new methodology based on water and energy balances is developed for assessing the water-use and energy efficiency in urban green spaces. The proposed balances, adapted from those developed for water supply systems, are specifically tailored for accounting for urban green spaces specificities, namely, landscape water requirements, other uses besides irrigation and over irrigation water losses. The methodology is demonstrated in two case studies of different nature and characteristics: a modern garden with a smart irrigation system and an urban park with traditional irrigation system. The results show that the developed water balances allow to estimate and assess the irrigation efficiency over the years and to assess the effectiveness of implemented water saving measures. The application of the water–energy balance demonstrates the impact of water efficiency measures on the energy efficiency of the irrigation systems. The proposed methodology can be used to assess water and water–energy efficiency in urban green spaces and to identify the most adequate improvement measures, contributing for a better management of the two resources in the cities.

Suggested Citation

  • Laura Monteiro & Raquel Cristina & Dídia Covas, 2021. "Water and Energy Efficiency Assessment in Urban Green Spaces," Energies, MDPI, vol. 14(17), pages 1-15, September.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:17:p:5490-:d:628075
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    References listed on IDEAS

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    3. Cunha, Henrique & Loureiro, Dália & Sousa, Gonçalo & Covas, Dídia & Alegre, Helena, 2019. "A comprehensive water balance methodology for collective irrigation systems," Agricultural Water Management, Elsevier, vol. 223(C), pages 1-1.
    4. Ruíz-Pérez, María Rocío & Alba-Rodríguez, M. Desirée & Marrero, Madelyn, 2020. "The water footprint of city naturalisation. Evaluation of the water balance of city gardens," Ecological Modelling, Elsevier, vol. 424(C).
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