Comparison of Root Water Uptake Models
Comparison of Root Water Uptake Models
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根系吸水模型比较
DOI：
10.3178/jjshwr.5.3_13
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发表时间：
1992
期刊：
影响因子：
--
通讯作者：
T. Yano
中科院分区：
文献类型：
--
作者：
K. Momii;J. Nozaka;T. Yano
描述并比较了用于计算土壤根系统中土壤水分运动的四种吸水模型。 Gardner (1964) 以及 Molz 和 Remson (1970) 的两个模型主要基于非饱和土的水力特性，Herkelrath 等人的第三个模型主要基于非饱和土的水力特性。 (1977) 关于土壤湿度，以及 Feddes 等人的第四个模型。 (1978)关于土壤水基质势。该模型被纳入理查兹方程的有限差分数值计算中，包括根吸水项。结果表明，使用每个模型计算的土壤湿度剖面与在恒定环境条件下进行的室内实验的结果具有较好的一致性。在这四个模型中，第三个模型与实验结果最吻合。还表明，吸水剖面不仅取决于根密度分布，还取决于根区的土壤湿度剖面。
Four water uptake models for calculating soil moisture movement in a soil-root system are described and compared. Two models by Gardner (1964) and Molz and Remson (1970) are mainly based on the hydraulic properties of unsaturated soil, the third model by Herkelrath et al. (1977) on the soil moisture, and the fourth model by Feddes et al. (1978) on the soil water matric potential. The models are incorporated into a finite difference numerical calculation of Richards' equation including the root water uptake term. It is shown that soil moisture profiles, which are calculated using each model, are in relatively good agreement with those in laboratory experiments which are carried out under the constant environmental conditions. Among the four models, the third model agrees best with the experimental results. It is also shown that the water uptake profile depends on not only the root density distribution but also the soil moisture profile in the root zone.