彭门蒸发力快速表算法  

TABLES FOR QUICK COMPUTATION OF THE PENMAN ESTIMATE OF POTENTIAL EVAPOTRANSPIRATION

作　　者：王懿贤[1] 

机构地区：[1]中国科学院地理研究所

出　　处：《地理研究》1983年第1期93-107,共15页Geographical Research

摘　　要：本文简要介绍了彭门蒸发力公式的计算方法,然后给出了计算该公式的查算表、并举例说明了计算方法。This paper contains the following four main parts.1.A brief survey of the definition of potential evapotranspiration Et,and the relation between the potential evapotranspiration Et and the open water evaporation Eo.2.Historical review of the study of evaporation.3. The factors δ/δ+v and v/δ+v have been considered as "weighingfactors" which specify the efficiency of conversion of net radiation into energy of vaporizing water. It was considered that these weighing factors are function of mean air temperature alone, but recent study indicated that these factors are quite related to altitude. We take these factors as the functions of mean air temperature and the altitude of meteorological stations.4. For the purpose of quick calculation, We provide 6 tables for calculating the Penman estimate of potential evapotranspiration. i. e. 1) table of δ/δ+v and diagram of v/δ+v at different altitudes and for different mean airtemperatues,2) table of conversion from different mean air temperatures and relative humidities to saturation deficit, 3) table of (0.56 - 0.08ed^1/ed) ,4)tableof (0.10 +0.90n/N), 5) table of (0.248 + 0.752n/N, and 6) Table of conversion from U10 to 0.26 ( 1 + 9.8 × 10-3U2).

关 键 词：蒸发力 表算法 O口 Penman 心门 饱和差 地理研究 表速 文献 长波辐射 

分 类 号：P9[天文地球—自然地理学]