以实况资料对比研究各种裸地蒸发公式

• 作 者: J.F.Mahfout J.Noilhan 董颜
• 出 处: 地理译报
• 发表日期: 1993年01期
• 关键词: 特征曲线 实况资料 深土层 数值模式 导水率 湿度廓线 土壤相对湿度 分辨力 上壤 田间持水量

1.引言鉴于土壤水不是自由水,裸地蒸发过程非常复杂。土表和大气间水汽转化量不仅取决于较深土层向上传输水分的能力,还受紧贴地表处土壤水发生汽化的薄土层中水汽向外扩散能力的影响。同时,土壤水文特征曲线的强非线性也要求表达上述界面处质量、热量转化的数值模式要非常全面,对此可采用近界面的垂向分辨力(约1 mm),

1. Introduction Since the soil water is not free water, the evaporation process in the bare land is very complicated. The amount of water vapor transferred from the earth’s surface to the atmosphere depends not only on the ability of the deeper layers to transport moisture upwards, but also on the ability of the water to diffuse outward in the thin layers of vaporized soil adjacent to the surface water at the surface. At the same time, the strong nonlinearity of the soil hydrological characteristic curve also requires the expression of the mass at the above interface. The numerical model of the heat conversion is very comprehensive. For this, the vertical resolution of the near interface (about 1 mm)