评估收集器间距,定位和喷嘴选择方法在中心轴中水分发统一性的评估
Lucas Maltoni Andrade1, Rubens Alves de Oliveira1, Fernando França da Cunha1
1Department of Agricultural Engineering, Center of Agricultural Sciences, Federal University of Viçosa, Viçosa, Minas Gerais, Brazil.
PloS one
|September 12, 2025
概括
中枢枢纽灌系统需要适当的设计,以便均地分配水. 这项研究发现,虽然收集器线位置影响统一度量,但在评估的两个系统中,整体场统一系数 (CUCHH) 超过了90%.
科学领域:
- 农业工程 农业工程
- 灌科学 灌科学
- 水资源管理 水资源管理
背景情况:
- 中枢转向灌系统对于现代农业至关重要,需要精确的设计和定期评估以优化水分配和效率.
- 评估水分配的统一性是识别系统性能问题的关键,并提高灌农业的用水效率.
- 采集器间距和采样方法显著影响中心枢纽系统中统一性评估的准确性.
研究的目的:
- 评估收集器间距和各种采样方法对中心枢纽灌中水分发放均性的影响.
- 分析选择排放喷嘴的策略,以提高系统性能.
- 评估收集器线路定位和间距对均度指标的影响,如平均水深 (LM),加权平均水深 (LW) 和修改的克里斯蒂安森均系数 (CUCHH).
主要方法:
- 在两个中心轴 (P180和P360) 进行了统一性评估,使用间隔1米的收集器,通过省略读数来模拟更大的间距.
- 在50%的调节下,使用垂直于轴心运动的采集器线,根据文献建议单独和小组分析数据.
- 测量了喷嘴选择的流量,考虑了不同发射器间距所需的流量和直径,并使用LM,LW和CUCHH计算了统一性.
主要成果:
- 平均场 CUCHH 超过 90% 的两个枢纽,表明出色的统一性,尽管测量流速产生更高的模拟水深和较低的 CUCHH 比模拟的参考率.
- 在结合不同的集体线位置或仅分析集体间距时,在统一度量方面没有发现显著差异.
- 收集器线路的定位显著影响了结果,影响了LM,LW和CUCHH的P360和LW的P180. 估计蒸发和风漂流损失约为13-14%左右.
结论:
- 虽然收集器线路的定位会影响特定的统一性指标,但评估的中心枢纽系统的整体现场性能是很好的 (>90% CUCHH).
- 该研究强调了正确的收集器线路放置对于准确的统一性评估的重要性,即使系统的整体性能很高.
- 喷嘴选择策略理论上表明CUCHH高于观察到的模拟值,这表明发射器设计和配置的进一步优化潜力.
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