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Measuring the effects of sediment variation and evaporation loss on the overall operational efficiency of hydropower systems: A robust network data envelopment analysis model

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  • Yeh, Li-Ting

Abstract

Accurately assessing hydropower system efficiency is crucial for effective management and strategic planning. Sediment variation and evaporation loss challenge water availability for energy generation, with some systems exhibiting nonpositive values for these variables. To address the effects of nonpositive data on sediment variation and evaporation loss, a robust network data envelopment analysis (DEA) model is adopted in this study. Examples are provided to illustrate the proposed method and compare the results with those of previous methods to emphasize its advantages in the handling of nonpositive data. The proposed model is applied to assess the efficiencies of water storage and energy production substages and the overall operational efficiencies of Taiwan's hydropower systems. In this study, the significance of considering sediment variation and evaporation loss when assessing the efficiency of a hydropower system is emphasized. The south-central region of Taiwan is identified as the most suitable area for hydropower development. Policymakers should develop efficiency improvement strategies for different regions, particularly during the water storage stage.

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  • Yeh, Li-Ting, 2025. "Measuring the effects of sediment variation and evaporation loss on the overall operational efficiency of hydropower systems: A robust network data envelopment analysis model," Renewable Energy, Elsevier, vol. 242(C).
    • Handle: RePEc:eee:renene:v:242:y:2025:i:c:s0960148125001508
    DOI: 10.1016/j.renene.2025.122488
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