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在点源滴水灌下对土壤水分运动和湿化行为的建模
Dinesh Kumar Vishwakarma1, Rohitashw Kumar2, Salwan Ali Abed3
1Department of Irrigation and Drainage Engineering, Govind Ballabh Pant University of Agriculture and Technology, Pantnagar, Uttarakhand, 263145, India. dinesh.vishwakarma4820@gmail.com.
Scientific reports
|September 11, 2023
概括
精确的滴灌设计依赖于了解土壤湿模式. 这项研究验证了一种预测水分移动的模型,这对于果园中高效的水资源管理至关重要.
科学领域:
- 农业工程 农业工程
- 土壤科学 土壤科学
- 水文学的水文学
背景情况:
- 表面滴滴灌对于农业节水至关重要.
- 了解土壤水分分布是优化灌效率的关键.
- 排放排放率显著影响湿模式.
研究的目的:
- 为了研究不同点源滴灌灌排放率下的土壤水分运动和湿模式.
- 评估土壤随着时间的推移而湿化的水平和垂直程度.
- 为了验证滴灌水模型在预测土壤水分动态方面的准确性.
主要方法:
- 实地实验是在一个果园里进行的,使用的放电速率为2,4和8Lh-1.1.
- 在不同的灌时间 (30,60,120分钟) 中,挖掘了土壤坑,以测量湿土的宽度和深度.
- 使用Drip-Irriwater模型对现场数据进行模拟和验证湿前线预测.
主要成果:
- 模拟的土壤湿度动态与现场观测密切匹配,具有高的相关系数 (皮尔森的r=0.951,相关性=0.918) 和Nash-Sutcliffe效率为0.887.
- 增加的排放排放率导致了更广泛和更深的土壤湿模式.
- 土壤水分含量随着更高的流量和应用时间而增加,特别是在土壤上层.
结论:
- 滴滴灌模型是一种实用且准确的工具,用于预测滴滴灌下土壤湿模式和水分分布.
- 该研究为优化排放排放率和设计高效滴灌系统提供了有价值的数据.
- 了解土壤湿度动态对于农业环境中有效的水资源管理至关重要.
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