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Relevance of Reservoir Morphometry in the Evaporation Process: an Evaporation Model for Semi-Arid Regions

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Abstract

Water that evaporates from reservoirs can be considered water lost by the system. To estimate the volume of water evaporated from a reservoir, the climate and reservoir morphometric factors should be considered. The model developed by this research estimated the annual evaporation volume rate (EVR) of reservoirs through morphometric factors, based on reservoir maximum volume, maximum depth, and maximum area. In the study area, located in a semi-arid region of Brazil, 5–88% of reservoir maximum volumes were determined to be lost annually during the evaporation process. The results of the model adjustment were considered good since the model did not take into account climatic factors and uses only easily obtained morphometric data. The model developed is a new, easy-to-use tool for predicting the evaporation efficiency of reservoirs and can be used for planning new dam projects and assessing the operation of those already installed. The model was developed for reservoirs in the Brazilian semi-arid region, and we recommend building on this methodology for estimating the annual EVR for regions with other specific climates.

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Availability of Data and Materials

Datasets for this research are available in this in-text data citation reference: Maia et al. (2020).

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Funding

This study was financed in part by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior – Brasil (CAPES) – Finance Code 001.

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E M B Costa: Conceptualization, data curation, formal analysis, investigation, methodology, software, validation, visualization, writing – original draft, writing – review & editing; P S Lucio: Formal analysis, writing – review & editing; A G Maia: Conceptualization, methodology, project administration, supervision, writing – original draft, writing – review & editing.

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Correspondence to Adelena Gonçalves Maia.

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da Costa, E.M.B., Lucio, P.S. & Maia, A.G. Relevance of Reservoir Morphometry in the Evaporation Process: an Evaporation Model for Semi-Arid Regions. Water Resour Manage 35, 4895–4907 (2021). https://doi.org/10.1007/s11269-021-02978-1

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  • DOI: https://doi.org/10.1007/s11269-021-02978-1

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