| 荒漠-绿洲过渡区灌丛沙包的蒸散特征及模拟 |
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| 引用本文： | 崔向慧,冯强,王学全.荒漠-绿洲过渡区灌丛沙包的蒸散特征及模拟[J].中国水土保持科学,2007,5(1):44-48. |
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| 作者姓名： | 崔向慧 冯强 王学全 |
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| 作者单位： | 1. 中国林业科学研究院林业研究所;国家林业局林木培育重点实验室;中国防治荒漠化研究与发展中心,100091
2. 北京林业大学,100083,北京 |
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| 基金项目： | 国家科技攻关项目;科技部科研院所社会公益研究专项基金 |
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| 摘 要： | 利用长期的观测与试验数据,采用波文比-能量平衡法对甘肃民勤荒漠—绿洲过渡区柽柳、白刺灌丛沙包和裸露流动沙丘的蒸散特征与变化规律进行分析,探讨蒸散量与气象因子的关系,在此基础上,应用土壤-植被-大气连续体（SPAC）的耦合数值模式,对不同植被灌丛的蒸散过程进行模拟。结果表明:在蒸散日进程中,有植被覆盖的柽柳沙包和白刺沙包的蒸散率峰值出现时间比流动沙丘早12h,且日最大蒸散速率大小顺序为,柽柳沙包（0.24mm/h）>白刺沙包（0.20mm/h）>流动沙丘（0.18mm/h）;柽柳沙包和白刺沙包在7—9月的蒸散量最高,分别占各自生长期耗水量的69.3%和65.4%;影响荒漠—绿洲过渡区灌丛植被蒸散的主要气象因子为日照百分率、气温、空气饱和差以及风速等,它们与日蒸散量的斜率关联度分别为0.717、0.643、0.649和0.705;SPAC耦合数值模式能够模拟不同植被覆盖度下灌丛植被蒸散的变化趋势,模拟值与实测值基本一致,具有很好的稳定性和可靠性。
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| 关 键 词： | 荒漠—绿洲 蒸散 模拟 灌丛沙包 民勤 |
| 修稿时间： | 2006-07-282006-12-08 |
Characteristics and simulation analysis of evapotranspiration of shrub sand dune at the oasis-desert transitional zones |
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| Cui Xianghui,Feng Qiang,Wang Xuequan.Characteristics and simulation analysis of evapotranspiration of shrub sand dune at the oasis-desert transitional zones[J].Science of Soil and Water Conservation,2007,5(1):44-48. |
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| Authors: | Cui Xianghui Feng Qiang Wang Xuequan |
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| Institution: | 1 .Research Institute of Forestry, Chinese Academy of Forestry; 2.Key Laboratory of Tree Breeding and Cultivation, State Forestry Administration; 3. China National Research and Development Center of Combating Desertifieation, 100091 ; 4. Beijing Forestry University, 100083, Beijing, China |
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| Abstract: | Evapotranspiration is one of the very important factors in water circulation and heat balance.Utilizing long-term observation and experimentation data,characteristics and changes of evapotranspiration shrub sand dune at the oasis-desert transitional zones were analyzed using Bowen-ratio methods;the relationship between evapotranspiration and meteorologic factors were explored.And then, evapotranspiration process in the Soil-Plant-Atmosphere Continuum were simulated with numerical simulation model.In the diurnal process of evapotranspiration, the occuring time of maximum evapotranspiration of Tamarix ramosissima and Nitraria tangutorum sand dune is earlier than that on the shifting sand dune.The order of maximum evapotranspiration rate is: Tamarix ramosissima sand dune(0.24 mm/h)>Nitraria tangutorum sand dune(0.20 mm/h)>shifting sand dune(0.18 mm/h).From July to September,the evapotranspiration of Nitraria tangutorum and Nitraria tangutorum were 69.3% and 65.4% of total evapotranspiration during the growing seasons.Through greycorrelation analysis,the main meteorologic factors effect on evapotranspiration were discovered,including sunlight,air temperature,air moisture stress,wind speed and so on;their correlative coefficients are 0.717,0.643,0.649 and 0.705 respectively.The preliminary results indicated that SPAC model is suitable for simulating and predicting evapotranspiration processes on the surface covered with different plants in arid and semi-arid area. |
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| Keywords: | oasis-desert evapotranspiration simulation shrub sand dune Minqin |
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