| 青藏高原土壤水热过程模拟研究(Ⅰ):土壤湿度 |
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| 引用本文： | 张世强,丁永建,卢健,刘时银.青藏高原土壤水热过程模拟研究(Ⅰ):土壤湿度[J].冰川冻土,2004,26(4):384-388. |
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| 作者姓名： | 张世强 丁永建 卢健 刘时银 |
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| 作者单位： | 1. 中国科学院, 寒区旱区环境与工程研究所, 甘肃, 兰州, 730000;2. 武汉大学, 遥感信息工程学院, 湖北, 武汉, 430079 |
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| 基金项目： | 中国科学院知识创新工程项目
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国家自然科学基金 |
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| 摘 要： | 模拟青藏高原土壤水分和热量迁移过程的连续变化对于全球变化研究具有非常重要的意义,其准确模拟是提高陆面过程模拟精度的重要条件.利用大尺度水文模型中对冻土中水分和能量平衡过程的描述,对沱沱河站点超过一年时间的土壤湿度进行了步长为1h,总时间为399d的连续模拟.与Game Tibet项目中同一时刻的土壤湿度观测资料比较的结果表明,Fuchs方程对于描述冻土中的最大未冻水含量是有效的,利用能量平衡计算获得的土壤各层的湿度与观测值相比较,其连续变化基本合理.结果表明,用该模型对高原水热过程进行长期模拟是可行的.
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| 关 键 词： | 冻土土壤湿度观测模拟 |
| 文章编号： | 1000-0240(2004)04-0384-05 |
| 收稿时间： | 2003-11-19 |
| 修稿时间： | 2003年11月19日 |
Simulative Study of Water-Heat Process in the Tibetan Plateau (I): Soil Moisture |
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| ZHANG Shi-qiang{,},DING Yong-jian,LU Jian,LIU Shi-yin.Simulative Study of Water-Heat Process in the Tibetan Plateau (I): Soil Moisture[J].Journal of Glaciology and Geocryology,2004,26(4):384-388. |
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| Authors: | ZHANG Shi-qiang{ } DING Yong-jian LU Jian LIU Shi-yin |
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| Institution: | 1. Cold and Arid Regions Environment and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou Gansu 730000, China;2. School of Remote Sensing and Information Engineering, Wuhan University, Wuhan Hubei 430079, China |
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| Abstract: | Water-heat process in the Tibetan Plateau is significant to global climate change, variance of soil moisture and soil temperature is the key factor of simulating water-heat process. In this paper, a water and energy balance macro-scale hydrological model is used to compare the simulated soil moisture, soil temperature and other fluxes with the observed ones on the step of 1 hour during 399 days in Tuotuohe. The results of soil moist ure are discussed. The changing tendency of the simulated soil moisture in three layers is accordant well with that of observation for more than one year. It is indicated that the Fuchs Equation can properly get the maximum unfrozen water in frozen soil in cold season, and a fairly little accumulated error exists in the simulation. The results reveal that the model is stable in yearly scale and can simulate for a long period in the Tibetan Plateau. |
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| Keywords: | frozen soil soil moisture observation simulate |
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