彭曼方程
彭曼—蒙蒂思方程将它用于叶片,提出叶片的潜热通量密度方程;1965年蒙蒂思将它应用于植物群体,被称为彭曼—蒙蒂思方程: 彭曼—蒙蒂思方程 E:蒸腾率(千克·米-2·秒-1);△:空气饱和水汽压随温度的变率(百帕·开-1);R:净辐射通量密度(瓦·米-2),向地面为正;G:土壤热通量密度(瓦·米-2),向下为正;...
彭曼方程
P. Ambaum 1The Penman equation(彭曼方程)For agricultural or hydrological applications it is essential to know surface param-eters such as surface evaporation or heat fl uxes. However, these parameters are quite diff i cult to measure directly. For humid surfaces, the Penman equation 1 gives a...
根布层水补给情况,通定期测定降雨量土壤水含量确定蒸散量.④湍流交换.通测定近面层水汽梯度湍流系数计算水垂直通量,确定蒸散量.⑤热量平衡.通测定表热量收支各量确定消耗于蒸散热量.⑥综合.综合应用热量平衡程湍流交换程计算能蒸散量(见能蒸散量),再用能蒸散量土壤水含量及植状况参数建立函数关系,...