ZHANG Luodan,ZHANG Yu,HUANG Mingbin,et al.Simulations of Soil Water Balance in Two Arbor Forests Grown in Gully Region of the Loess Plateau[J].Research of Soil and Water Conservation,2015,22(02):26-31.
黄土高塬沟壑区两种乔木林土壤水分平衡的模拟
- Title:
- Simulations of Soil Water Balance in Two Arbor Forests Grown in Gully Region of the Loess Plateau
- 关键词:
- Hydrus-1 D模型; 侧柏林; 刺槐林; 土壤水分; 水量平衡
- 分类号:
- S152.7
- 摘要:
- 为了了解黄土高塬沟壑区不同乔木林的耗水规律，利用长期定位试验资料和Hydrus-1D模型详细研究了两种乔木林（侧柏林，刺槐林）的土壤水分动态变化及水量平衡各要素的差异。结果表明：结合优化的水力参数，Hydrus-1 D模型能准确地模拟两种乔木林地土壤水分动态，模拟值与实测值均方根误差在0.018～0.029 cm3/cm3之间，相对平均绝对误差在9.8%～12.5%之间；水分平衡各要素受气候和植物类型影响，蒸散量是水平衡中的主要支出项，侧柏林蒸散量占同期降水量的83.4%～108.4%，刺槐林蒸散量占同期降水量的75.9%～96.2%，生长季内刺槐林土壤储水量始终大于侧柏林。
- Abstract:
- In order to investigate the differences in water consumption of two arbor forests grown in the gully region of the Loess Plateau, Hydrus-1 D model coupling the long-term experimental data was used to simulate the dynamics of soil water and soil water balance components in the sites grown Platyclatus orientalis and Robinia pseudoacacia. With the calibrated and validated hydraulic parameters, the Hydrus-1 D could be used to simulate soil water dynamics in two arbor forests. The root mean square errores between the simulated and measured water contents ranged from 0.018 cm3/cm3 to 0.029 cm3/cm3, while the mean absolute relative errores varied from 9.8% to 12.5%. The components of soil water balance were impacted by climatic conditions and tree species. Evapotranspiration was the largest one among all components of soil water balance, which varied from 83.4% to 108.4% of total precipitation for Platyclatus oriental, and from 75.9% to 96.2% of total precipitation for Robinia pseudoacacia. With regard to the two trees, Robinia pseudoacacia had the larger soil water storage than Platyclatus orientalis during the study period from 2011 to 2013.
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备注/Memo
收稿日期:2014-05-13;改回日期:2014-06-06。
基金项目:国家自然科学基金重大项目（41390463）；国家自然科学基金（41171186）
作者简介:张洛丹(1988-),女,河南洛阳人,硕士研究生,主要从事土壤物理研究。E-mail:luodanzhang1209@126.com
通讯作者:黄明斌(1968-),男,湖北钟祥人,研究员,博士生导师,主要从事生态水文和土壤物理研究。E-mail:hmbd@nwsuaf.edu.cn