ESTIMATING UNITED-STATES CLASS-A PAN EVAPORATION FROM FEW CLIMATE DATA

被引：115

作者：

LINACRE, ET

机构：

[1] Geography Department, School of Resource and Environmental Management, Australian National University, Canberra

来源：

WATER INTERNATIONAL | 1994年 / 19卷 / 01期

关键词：

D O I：

10.1080/02508069408686189

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

In view of the shortage of good measurements of lake evaporation for testing a new estimation formula, a modification of the formula has been devised that can be compared with U.S. Class A pan measurements, which are available widely. Both formulae, for lake and pan evaporation respectively, are based on Penman's evaporation equation and are for use when the only reliable data that are available are daily extreme temperatures, for instance The pan evaporation formula allows for the geometry of a U.S. Class A pan evaporimeter, and for the wetness and albedo of its surroundings, without requiring any empirical calibration based on evaporation measurements. The resulting equation for the monthly mean pan evaporation rate (the so-called 'Penpan' formula) includes an estimate of the solar irradiance, which may be obtained from the extra-terrestrial radiation and the cloudiness, derived from rainfall figures. Estimates of evaporation differ from measurements with pans at nine places around the world by about 0.6 mm/d.

引用

页码：5 / 14

页数：10

共 51 条

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