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灌溉水利用率是干旱和半干旱地区适宜灌溉技术选择的重要依据。该研究以描述土壤-植物-大气连续体能量和水量平衡过程的CUPID模型为基础,提出了考虑喷灌对田间小气候影响的喷灌水利用率模拟模型,定义了模型应用时间段,并对模拟值相对误差进行了评估。结果表明,喷灌蒸发损失对大气温度和湿度的调节作用持续时间与灌溉时间有关,喷灌水利用率模型应用时间段应以大气温度和湿度均恢复到无灌溉区水平为标准。与波文比能量平衡法计算的喷灌水利用率相比,该模型计算的喷灌水利用率相对误差在6.0%以内,可作为评估喷灌水利用率的有效工具。
Irrigation water use efficiency is an important basis for the selection of suitable irrigation techniques in arid and semi-arid areas. Based on the CUPID model, which describes the balance of energy and water balance in the soil-plant-atmosphere continuum, this study proposed a simulation model of sprinkler irrigation water use efficiency considering the influence of sprinkler irrigation on the microclimates in the field, defined the application period of the model, The error was evaluated. The results show that the duration of regulation of atmospheric evaporation and evaporation on atmospheric temperature and humidity is related to irrigation time. The application period of irrigation water utilization model should be based on the standard of the return of atmospheric temperature and humidity to the level of non-irrigated area. Compared with the sprinkler irrigation efficiency calculated by the Bowen and the energy balance method, the relative error of sprinkler irrigation utilization calculated by the model is less than 6.0%, which can be used as an effective tool to evaluate the utilization efficiency of sprinkler irrigation.