...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>農業気象 >Application of the two-layer model for predicting transpiration from the rice canopy and water surface evaporation beneath the canopy
【24h】

Application of the two-layer model for predicting transpiration from the rice canopy and water surface evaporation beneath the canopy

机译：两层模型在水稻冠层蒸腾和冠层下水面蒸发预测中的应用

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

In order to quantify evaportranspiration and separate it into evaporation and transpiration, the two-layer model was applied. The aerodynamic and rice canopy resistance were estimated based on the two-layer model with measured meteorological data, water surface evaporation beneath the rice canopy and transpiration from the canopy measured by lysimeters. The aerodynamic resistances included aerodynamic resistance between the rice canopy and the air (r(ac)), aerodynamic resistance between the water surface beneath the rice canopy and the air (r(ag)), and the total aerodynamic resistance (r(a)). It was found that the aerodynamic resistances decreased with the increase in wind speed, while they increased with the increase in plant height. The relationships between these aerodynamic resistances and the wind speed above the canopy were individually parameterized by plant height. The rice canopy resistance (r(c)) was mainly influenced by the global solar radiation (SR) and the vapor pressure deficit of the air (VPD). The r(c) decreased with the increase in SR, while it increased with the increase in the VPD. The r(c) model was developed by a hyperbolic function with SR for the three growing stages and the model parameter was decided by the VPD. By incorporating these resistance sub-models into the two-layer model, evaporation from the water surface beneath the canopy and transpiration by the rice canopy were reproduced successfully.
机译：为了量化蒸发蒸腾并将其分为蒸发和蒸腾，应用了两层模型。基于两层模型，利用测量的气象数据，水稻冠层下的水面蒸发和蒸渗仪测量的冠层的蒸腾作用，对空气动力学和水稻冠层的抵抗力进行了估算。空气动力学阻力包括水稻冠层和空气之间的空气动力学阻力（r（ac）），水稻冠层下方的水表面和空气之间的空气动力学阻力（r（ag））以及总空气动力学阻力（r（a） ）。研究发现，空气阻力随着风速的增加而减小，而随着植物高度的增加而增大。这些空气动力学阻力和顶篷上方的风速之间的关系由植物高度单独设置。水稻冠层阻力（r（c））主要受全球太阳辐射（SR）和空气蒸气压亏空（VPD）的影响。 r（c）随着SR的增加而降低，而随着VPD的增加而增加。 r（c）模型是通过双曲线函数使用SR在三个生长阶段开发的，模型参数由VPD确定。通过将这些阻力子模型合并到两层模型中，成功地再现了从冠层下的水面蒸发和水稻冠层的蒸腾作用。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号