| 唐小娟,向鹏,郑健,王英.沼液穴灌参数对土壤入渗特性的影响机制及模型构建[J].干旱地区农业研究,2025,(6):173~183 |
| 沼液穴灌参数对土壤入渗特性的影响机制及模型构建 |
| Influence mechanism and model construction of biogas slurry hole irrigation parameters on soil infiltration characteristics |
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| DOI：10.7606/j.issn.1000-7601.2025.06.17 |
| 中文关键词: 沼液穴灌 穴孔参数 湿润锋运移 累积入渗量 HYDRUS-2D模型 |
| 英文关键词:biogas slurry hole irrigation hole parameter wetting front migration cumulative infiltration HYDRUS-2D model |
| 基金项目:甘肃省水利科学试验研究及技术推广计划项目（24GSLK012,25GSLK015）；国家自然科学基金项目（52469011） |
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| 中文摘要: |
| 为探究沼液穴灌中沼液配比、穴孔直径和深度对土壤湿润锋运移和累积入渗量的影响，优化沼液穴灌穴孔参数及作物灌水量，设计经济高效的沼液灌溉系统，利用HYDRUS-2D模型和实测土壤特征参数构建并验证沼液穴灌土壤水分运动模型。结果表明：基于HYDRUS-2D模型模拟的累积入渗量和湿润锋运移距离与实测值拟合良好（NSE>0.966，PBIAS≤±0.3）；土壤累积入渗量、土壤湿润锋运移距离随沼液配比的增大而逐渐减小，随穴孔直径和深度的增大而逐渐增大；湿润锋横向和垂向运移距离均与稳定入渗率和入渗时间呈良好的幂函数关系(R2≥0.977)；湿润锋曲线可以用椭圆曲线方程表示(R2≥0.957)，且沼液穴灌土壤累积入渗量与湿润体面积呈线性关系(R2≥0.972)；建立的沼液穴灌湿润锋运移距离模型（NSE>0.976, PBIAS≤±0.13）和累积入渗量模型（NSE>0.982，PBIAS≤±0.10)可靠性良好，能够较准确地描述沼液穴灌参数变化产生的影响，可为沼液穴灌适宜参数和灌溉量的确定提供理论依据。 |
| 英文摘要: |
| To explore the effects of biogas slurry ratio, hole diameter, and depth on the soil wetting front migration distance and cumulative infiltration during biogas slurry hole irrigation, the hole parameters of biogas slurry hole irrigation and crop irrigation amount were optimized, and an economical and efficient biogas slurry irrigation system was designed. The HYDRUS-2D model and the measured soil characteristic parameters were used to construct and verify the soil movement model of biogas slurry hole irrigation. The results showed that the cumulative infiltration and wetting front migration distance simulated by the HYDRUS-2D model closely matched the laboratory test results (NSE>0.966, PBIAS≤±0.3). Soil cumulative infiltration and wetting front migration distance decreased with the increase of biogas slurry ratio and increased with the increase of hole diameter and depth. The lateral and vertical migration distances of the wetting front exhibited a strong power function relationship with the stable infiltration rate and infiltration time (R2≥0.977). The wetting front curve could be accurately represented by an elliptic curve equation (R2≥0.957), and soil cumulative infiltration under biogas slurry hole irrigation demonstrated a linear relationship with the wetted body area (R2≥0.972). The established model for the wetting front migration distance model (NSE>0.976, PBIAS≤±0.13) and cumulative infiltration model (NSE>0.982, PBIAS≤±0.10) exhibited good reliability, accurately describing the impact of variations in biogas slurry hole irrigation parameters. This provides a theoretical basis for determining appropriate parameters and irrigation volumes for biogas slurry hole irrigation. |
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