| 基于HYDRUS-2D的负压微润灌土壤水分运动模拟 |
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| 引用本文： | 徐俊增,刘玮璇,卫琦,王可纯,王海渝,周姣艳.基于HYDRUS-2D的负压微润灌土壤水分运动模拟[J].农业机械学报,2021,52(8):287-296. |
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| 作者姓名： | 徐俊增 刘玮璇 卫琦 王可纯 王海渝 周姣艳 |
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| 作者单位： | 河海大学;昆山市城市水系调度与信息管理处 |
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| 基金项目： | 国家自然科学基金项目（51809077） |
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| 摘 要： | 为研究负压微润灌不同技术参数组合下的土壤水分运动过程，以土箱试验实测含水率为依据，构建并验证了基于HYDRUS-2D的负压微润灌土壤水分运动反演模型，并结合反演模型对负压微润灌多种组合情景的土壤湿润体模拟结果和典型设施作物根系分布特征及需水规律，探究适宜于不同设施作物的负压微润灌技术参数组合。结果表明：采用HYDRUS-2D反演模型能够较好地模拟负压微润灌不同供水水头条件下的土壤湿润体特征，土壤湿润距离（水平距离、垂直向上距离和垂直向下距离）、含水率及累积入渗量模拟值与实测结果之间的决定系数和NSE分别达到0.98和0.77以上。试验及模拟结果均表明，负压微润灌条件下供水水头与土壤含水率、累积入渗量及不同方向的湿润距离均呈负相关关系。此外，基于反演模型对负压微润灌不同湿润体的情景模拟结果和典型设施作物根系分布特征及需水规律，拟定了不同设施作物适宜的负压微润灌技术参数范围。本研究对农业生产中负压微润灌技术参数的选择及新型节水微润灌技术的推广具有指导意义。
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| 关 键 词： | 负压微润灌 湿润体特征 土壤水分入渗 HYDRUS-2D模型 |
| 收稿时间： | 2021/4/6 0:00:00 |
Simulation of Soil Moisture Movement under Negative Pressure Micro-irrigation Based on HYDRUS-2D |
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| XU Junzeng,LIU Weixuan,WEI Qi,WANG Kechun,WANG Haiyu,ZHOU Jiaoyan.Simulation of Soil Moisture Movement under Negative Pressure Micro-irrigation Based on HYDRUS-2D[J].Transactions of the Chinese Society of Agricultural Machinery,2021,52(8):287-296. |
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| Authors: | XU Junzeng LIU Weixuan WEI Qi WANG Kechun WANG Haiyu ZHOU Jiaoyan |
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| Institution: | Hohai University; Urban Water Scheduling and Information Management Department of Kunshan |
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| Abstract: | It has important guiding significance for the selection of technological parameters of negative pressure micro-irrigation for different crops, by understanding the characteristics of soil water movement under different combinations of technical parameters of negative pressure micro-irrigation. The soil water movement inversion model under negative pressure micro irrigation based on HYDRUS-2D model was constructed and validated by parameter inversion based on the measured moisture data in the soil bin test. The combination of negative pressure micro-irrigation technical parameters suitable for different facility crops was explored by combining the simulation results of the inverse model for much wetter characteristics of negative pressure micro-irrigation and the root distribution characteristics and water demand pattern of typical facility crops. The results showed that the HYDRUS-2D inversion model can better simulate the characteristics of the soil wetter under different water supply heads of negative pressure micro-irrigation. The determination coefficients and NSE between simulated and measured values of soil wetting distance (horizontal distance, vertical upward distance and vertical downward distance), water content and cumulative infiltration reached above 0.98 and 0.77, respectively. Both experimental and simulation results showed that there was a negative correlation between the negative pressure of the water supply head and soil water content, the cumulative infiltration and wetting distance in different directions under negative pressure micro-irrigation conditions. In addition, a suitable range of technical parameters for negative pressure micro-irrigation for different facility crops was formulated, based on the simulation results of the inverse model for different wetting bodies of negative pressure micro-irrigation and the root distribution characteristics and water demand pattern of typical facility crops. These results were important for the selection of technical parameters for negative pressure micro-irrigation in agricultural production and the promotion of new water-saving irrigation techniques. |
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| Keywords: | negative pressure micro-irrigation wetted soil characteristic soil moisture infiltration HYDRUS-2D model |
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