| 引用本文: | 汪顺生,王爱滨,傅渝亮,等.宽垄沟灌土壤水分累积入渗特性HYDRUS-2D模拟与实验研究[J].灌溉排水学报,0,():-. |
| wangshunsheng,wangaibin,fuyuliang,et al.宽垄沟灌土壤水分累积入渗特性HYDRUS-2D模拟与实验研究[J].灌溉排水学报,0,():-. |
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| 摘要: |
| 【目的】探究宽垄沟灌土壤初始含水率和压力水头对累积入渗量的影响。【方法】利用HYDRUS-2D模拟均质土在5种不同初始含水率和压力水头条件下的宽垄沟灌过程，分析初始含水率和压力水头对土壤累积入渗量的影响；在电容充电模型基础上建立宽垄沟灌累积入渗量与入渗时间的经验模型并进行验证试验。【结果】宽垄沟灌土壤累积入渗量随着压力水头的增大而增大，随土壤初始含水率的增大而呈现减小的趋势。经验模型模拟值较为接近验证试验实测值，模型模拟效果较好。【结论】增大压力水头或减小土壤初始含水率有利于宽垄沟灌累积入渗量的增加，且对非线性入渗阶段影响较为明显；所建立的宽垄沟灌累积入渗模型具有较高的准确性。 |
| 关键词: 宽垄沟灌;累积入渗量;模型;HYDRUS-2D |
| DOI： |
| 分类号:S275.3 |
| 基金项目:国家自然科学基金（51779093）；河南省科技攻关项目（182102310049） |
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| Study on Experiment and Simulation of Cumulative Infiltration under the Wide Ridge Furrow Using HYDRUS |
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wangshunsheng, wangaibin, fuyuliang, chenchunlai, yanyongfang
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North China University of Water Resources and Electric Power
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| Abstract: |
| 【Objective】 In order to explore the influence of pressure head and initial soil moisture content on cumulative infiltration. 【Methods】 In this paper, based on the HYDRUS-2D simulation of the wide ridge irrigation process of homogeneous soil under 5 different initial moisture content and pressure water head conditions, the effects of both on the accumulated infiltration of soil were analyzed. On the basis of the capacitive charging model, an empirical model of the infiltration volume and the infiltration time of the irrigation with wide ridges and furrows was established. 【Results】 With the increase of pressure head, the accumulated infiltration amount of soil under wide ridge and furrow irrigation increased, and decreased with the increase of moisture content. The simulation value of the empirical model is close to the measured value of the verification test, and the simulation effect of the model is better. 【Conclusion】 Increasing the pressure head or decreasing the initial moisture content of the soil is beneficial to the increase of the accumulated infiltration in the irrigation of wide ridges and furrows. The established model of accumulated infiltration of wide ridge irrigation has high accuracy. |
| Key words: Wide furrow irrigation;Cumulative infiltration;Model;HYDRUS-2D |
