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Sustainability 2017, 9(9), 1531; doi:10.3390/su9091531

Irrigation-Induced Changes in Evapotranspiration Demand of Awati Irrigation District, Northwest China: Weakening the Effects of Water Saving?

State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing 100038, China
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Received: 1 June 2017 / Revised: 22 August 2017 / Accepted: 24 August 2017 / Published: 28 August 2017
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Abstract

The evapotranspiration demand of the Awati irrigation district has changed with irrigation development since 1980. During the first period of traditional irrigation expansion from 1980 to 1997, reference crop evapotranspiration (ET0) decreased as irrigation intensity increased. Since the second period of water-saving irrigation extension began in 1998, the gross irrigation quota has decreased as the water use efficiency improved, whereas ET0 has been increasing accordingly. The increasing evapotranspiration demand has enlarged the irrigation water requirement per unit area, which partly weakens the effects of water-saving irrigation. Findings show that irrigation-induced changes in evapotranspiration demand should be considered when evaluating the performance of water-saving technologies in irrigation districts in arid areas. View Full-Text
Keywords: irrigation efficiency; evapotranspiration demand; water-saving irrigation irrigation efficiency; evapotranspiration demand; water-saving irrigation
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Han, S.; Xu, D.; Yang, Z. Irrigation-Induced Changes in Evapotranspiration Demand of Awati Irrigation District, Northwest China: Weakening the Effects of Water Saving? Sustainability 2017, 9, 1531.

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