| 引用本文: | 潘大全,陈军锋,薛静,等.冻融期不同时间灌水对土壤蒸发规律影响的模拟研究[J].灌溉排水学报,0,():-. |
| pandaquan,CHEN Jun-feng,XUE Jing,et al.冻融期不同时间灌水对土壤蒸发规律影响的模拟研究[J].灌溉排水学报,0,():-. |
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| 摘要: |
| 【目的】研究冻融期不同时间灌水对土壤蒸发规律的影响。【方法】冻融期进行了未灌水裸地L0和7个不同时间灌水地块（即L1、L2、L3、L4、L5、L6和L7，灌水一次，灌水量225m3/hm2）的田间土壤水热监测，运用水热耦合模型（SHAW）模拟计算了土壤蒸发。【结果】冻融期灌水地块的土壤累积蒸发量比未灌水地块增加24.0%~150.0%，土壤累积蒸发量不稳定冻结阶段灌水促进土壤蒸发，与未灌水地块相比土壤累积蒸发量增加了22.4%~27.0%；稳定冻结阶段灌水对土壤蒸发的作用较弱，L3~L4土壤累积蒸发量最少，较其它灌水地块低3.8%~67.1%；消融解冻阶段灌水地块L6的土壤蒸发量最高，较其它地块高55.3%~97.1%。【结论】稳定冻结阶段灌水后对3d内的土壤蒸发速率影响较弱，冻融期灌水量的90.7%~91.4%储存在土壤中。 |
| 关键词: 季节性冻融期、灌水时间、SHAW、土壤蒸发、数值模拟 |
| DOI： |
| 分类号:S152.7；S152.8；S274.1 |
| 基金项目:国家自然科学基金面上项目(41572239)；国家自然科学基金青年科学(41502243)；山西省自然科学基金面上(201901D111053)；国家自然科学基金青年科学(51909183)；国家级大学生创新创业训练计划项目(202110112055)。 |
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| Simulation Study on the Effect of Irrigation at Different Times on Soil Evaporation during Freeze-Thaw Period |
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pandaquan1, CHEN Jun-feng1, XUE Jing1, CUI Li-hong1, ZHAO De-xing1, DU Qi2
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1.Taiyuan University of Technology;2.Taigu Water Balance Experimental Field, Hydrology and Water Resources Survey Station of Shanxi Province
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| Abstract: |
| Abstract:【Background】The permafrost regions of our country occupies a wide area, dry and less rainy. In view of the severe changes in climatic conditions, it may lead to water shortages for winter crops. Improve irrigation methods to increase water use efficiency to maintain winter agricultural production.【Objective】 In order to study the effect of irrigation at different times on soil evaporation during freeze-thaw period.【Method】 Field experiments were carried out on unirrigated bare land L0 and 7 different irrigated plots during freeze-thaw period (labeled L1, L2, L3, L4, L5, L6 and L7, irrigated only once with the quota of 225 m3 per hm2); And use the water-heat coupling model (SHAW) to carry on the simulation.【Result】 The cumulative soil evaporation in the irrigated plots during the freeze-thaw period increased by 24.0%-150.0% compared with the non-irrigated plots, and the soil cumulative evaporation was unstable. During the freezing stage, irrigation promoted soil evaporation, and compared with the non-irrigated plots, the cumulative soil evaporation increased by 22.4%~27.0%; in the stable freezing stage, the effect of irrigation on soil evaporation was weak, and the cumulative soil evaporation of L3~L4 was the least, which was 3.8%~67.1% lower than that of other irrigated plots; the soil evaporation of irrigated plot L6 in the thawing and thawing stage was the highest , 55.3%~97.1% higher than other plots.【Conclusion】In the stable freezing stage, the effect of irrigation on the soil evaporation rate within 3 days was weak, and 90.7%-91.4% of the irrigation amount in the freezing and thawing period was stored in the soil. |
| Key words: Seasonal freeze-thaw period, irrigation time, SHAW, soil evaporation, numerical simulation |
