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Spatial Water Use efficiency Index towards resource sustainability: application in the island of Crete, Greece

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  • O. Tzoraki
  • M. Kritsotakis
  • E. Baltas

Abstract

This paper introduces a new index to test water resource sustainability in regions where groundwater is the main source of water supply. The Spatial Water Use efficiency Index (SWUI) is a geographical information system (GIS) environment index which expresses the ratio of potential available water volume (groundwater recharge minus water needs) to the respective water needs. Its low and/or negative values indicate water stress. SWUI is applied in the island of Crete, Greece, where water needs are mainly covered by groundwater abstractions. The annual water mass balance is estimated using the RIBASIM (River Basin Simulation) model. The total freshwater needs in the Cretan region reach 535 hm-super-3 annually according to the model's simulation. SWUI with values ranging from - 0.8 to 214.3 has proved to be an important visual tool towards depicting the low efficiency of the east part of the island to cover water demand and a useful decision-making tool in the sustainability evaluation of groundwater aquifers.

Suggested Citation

  • O. Tzoraki & M. Kritsotakis & E. Baltas, 2015. "Spatial Water Use efficiency Index towards resource sustainability: application in the island of Crete, Greece," International Journal of Water Resources Development, Taylor & Francis Journals, vol. 31(4), pages 669-681, December.
    • Handle: RePEc:taf:cijwxx:v:31:y:2015:i:4:p:669-681
    DOI: 10.1080/07900627.2014.949637
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    Cited by:

    1. Long, Kaisheng & Pijanowski, Bryan C., 2017. "Is there a relationship between water scarcity and water use efficiency in China? A national decadal assessment across spatial scales," Land Use Policy, Elsevier, vol. 69(C), pages 502-511.
    2. Stefanos Stefanidis & Vasileios Alexandridis & Kaushik Ghosal, 2022. "Assessment of Water-Induced Soil Erosion as a Threat to Natura 2000 Protected Areas in Crete Island, Greece," Sustainability, MDPI, vol. 14(5), pages 1-22, February.
    3. Eleni Sofoulaki & Vasileios A. Tzanakakis & Georgios Giannopoulos & Iosif Kapellakis & Emmanouil Kabourakis & Theocharis Chatzistathis & Nikolaos Monokrousos, 2023. "Different Contribution of Olive Groves and Citrus Orchards to Soil Organic Carbon Sequestration: A Field Study in Four Sites in Crete, Greece," Sustainability, MDPI, vol. 15(2), pages 1-16, January.

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