| 膜下滴灌棉田土壤水盐运移简化模型 |
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| 引用本文： | 孙 林,罗 毅.膜下滴灌棉田土壤水盐运移简化模型[J].农业工程学报,2012,28(24):105-114. |
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| 作者姓名： | 孙 林 罗 毅 |
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| 作者单位： | 1. 中国科学院新疆生态与地理研究所荒漠与绿洲生态国家重点实验室,乌鲁木齐 830011
2. 中国科学院地理科学与资源研究所,中国科学院生态系统网络观测与模拟重点试验室,北京 100101 |
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| 基金项目： | 中国科学院"百人计划"项目（KZXC2-YW-BR-12）;国家重点基础研究发展计划（973计划）项目（2010CB951002）共同资助 |
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| 摘 要： | 滴灌农田土壤盐分积累是关系到这一方式是否可持续的重要问题,数值模拟是研究这一问题的重要手段,然而目前缺乏针对这一问题的可用模型。该文构建了一个滴灌土壤水盐运移简化模型,通过将膜下滴灌土体划分为若干单元格,通过滴灌入渗饱和湿润体形成、毛管扩散运移2个过程实现滴灌土壤水盐运移模拟,该模型包含有降水再分配、根系吸水、土壤蒸发等水文过程。于2010年在新疆石河子大学灌溉试验站微咸水滴灌试验,对构建的模型进行校正和验证,结果显示,该模型较好地模拟了膜下滴灌土壤水分与盐分运移过程以及土壤盐分积累特征,研究结果可为膜下滴灌条件下棉田土壤盐分积累及其影响因子研究提供基础。
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| 关 键 词： | 灌溉 土壤水分 盐分 膜下滴灌 数值模型 |
| 收稿时间： | 1/2/2012 12:00:00 AM |
| 修稿时间： | 2012/11/29 0:00:00 |
Simplified model on simulating soil water and salt transfer process under drip irrigation in cotton field |
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| Sun Lin and Luo Yi.Simplified model on simulating soil water and salt transfer process under drip irrigation in cotton field[J].Transactions of the Chinese Society of Agricultural Engineering,2012,28(24):105-114. |
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| Authors: | Sun Lin and Luo Yi |
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| Institution: | 1,2(1.State Key Laboratory of Desert and Oasis Ecology,Xinjiang Institute of Ecology and Geography,Chinese Academy of Sciences,Urumqi 830011,China;2.Key Laboratory of Ecosystem Network Observation and Modelling,Research,Institute of Geographic Sciences and Natural Resources Chinese Academy of Sciences,Beijing 100101,China) |
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| Abstract: | Salt accumulation under drip irrigation is a crucial problem relates to the irrigation district sustainable development directly. Mathematical simulation was an important method to answer this problem. However, the practical model was absent. We build a simplified algorithm on simulating soil water and soil salt transfer process under drip irrigation. In this model, the soil column of drip irrigation under mulch was divided into grids which used to simulated soil water and soil salt transfer process, the other hydrological process in the condition of drip irrigation under mulch, such as infiltration of precipitation or irrigation, and reallocation of soil water in unsaturated area, plant transpiration and soil evaporation also be simulated. The model was calibrated and validated by the observed data of the amount distribution and dynamics progress of soil salt obtained from field experiment which conducted in Water-saving Irrigation Experiment Station of the Shihezi University. The results indicated that the simplified algorithm well adapts to the simulation of soil water and soil salt dynamic in drip irrigated cotton field. |
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| Keywords: | irrigation soil water content soil salts under-mulch drip irrigation mathematical model |
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