HYDRUS-2D模型对海冰水灌溉情景下水盐迁移的模拟
Imulation of Sea Ice Water Irrigation and Salt Migration Using the HYDRUS-2D Model
查看参考文献14篇
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文摘
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环渤海滨海地区土地盐碱、淡水资源紧缺, 严重制约区域经济持续快速发展. 非常规海冰水资源利用的深入研究为盐碱地改造、粮食稳产丰产提供了新途径. 本文利用HYDRUS数值模拟的方法对3g/L海冰水灌溉进行模型模拟与验证, 验证结果表明模型具有较好的可靠性; 选择春季作物需水关键期141d为情景灌溉日, 灌溉量采用0 m~3/hm~2、300 m~3/hm~2、600 m~3/hm~2、1200 m~3/hm~2、1800 m~3/hm~2, 分析表明: 海冰水灌溉量为1200 m~3/hm~2时耕层土壤水分含量达到饱和, 耕层盐分含量不再会随灌溉量的增加而增加, 海冰水灌溉量≥1800 m~3/hm~2时, 部分盐分可淋洗到1m层以下. 本文旨在利用数值分析方法揭示研究区春季海冰水农业利用在灌溉量上的关键性技术, 以期为科学合理的利用海冰水资源提供参考 |
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其他语种文摘
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The Bohai Sea coastal areas suffer seriously from land salinity and fresh water resources shortage,which has significantly hampered rapid economic growth and sustainable development over the areas.Studying the utilization of water resources from sea ice creates a new opportunity for reclamation of saline and alkaline land and would be conducive to ensuring a stable grain yield. Sea ice could be used to address fresh water shortage problems for the areas and provide fresh water for crop growth.However,it would also result in potential risks to soil.Numerical analysis can provide a base for safely utilizing sea ice water and a more effective way for soil protection.In the present study,the authors simulated and verified the use of sea ice water with 3 g/L content in irrigation water supply using the HYDRUS model.Results seem to be generally reliable.We formulated the scenario that the 141st day during the growth in agricultural crops in spring was the critical day for irrigation,with the irrigation quantity of sea ice water being set as zero,300m~3/hm~2, 600m~3/hm~2,1200m~3/hm~2,and 1800m~3/hm~2,respectively.The scenario analysis indicates that the topsoil can be saturated when the irrigation quantity of the sea ice water is set to 1200m~3/hm~2.In this case,the salt content of the topsoil will not increase with increasing irrigation quantity.If the irrigation quantity exceeds 1800m~3/hm~2,some portion of the salt can be leached to below 1 m depth of the soil.The primary purpose of the study was to provide an insight into the key techniques and mechanisms of the use of sea ice water for irrigation in the rapid growth in agricultural crops in spring using numerical simulation.It is expected that the study can provide reference and a meaningful base to reasonably utilize sea ice water resources under the condition of ensuring soil safety |
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来源
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资源科学
,2011,33(2):377-382 【核心库】
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关键词
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海冰资源利用
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HYDRUS-2D模型
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水盐运移
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情景模拟
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地址
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1.
北京师范大学地理学与遥感科学学院, 北京师范大学区域地理研究重点实验室, 北京, 100875
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北京师范大学地理学与遥感科学学院, 北京师范大学区域地理研究重点实验室;;地表过程与资源生态国家重点实验室, 北京, 100875
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北京师范大学, 地表过程与资源生态国家重点实验室, 北京, 100875
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乌兰察布市气象局, 集宁, 012000
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语种
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中文 |
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ISSN
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1007-7588 |
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学科
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能源与动力工程 |
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基金
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国家863计划
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国家自然科学基金
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文献收藏号
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CSCD:4130745
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