摘要
本文研讨了山地下垫面蒸发的计算，提出了根据迳流系数和降水强度确定计算蒸发公式中与地形、植被、土壤等下垫面特性及降水性质有关的参数的方法，经实际检验，结果令人满意。
In this paper it is verified through experiment that the formulacan be used to calculate the. evaporation from land surface in mountainous area as well as inopen country. Here E0 is the evaporative power; r is the precipitation; m is a pararneterdepending on the nature of underlying surface,its expression is deduced theoretically as fol-lows:where Y is the coefficient of runoff, r the precipitation intensity(mmd -1 ),a,c and n are con-stants. In the mountainous areas of Yunnan Province, a = 0． 829,c = 0. 277, n = 0. 693, themean relative error in calculating the annual evaporations from land surface by formula (1 )with m determlned by expression (2) is 4． 2％.
出处
《气象科学》
CSCD
北大核心
1996年第4期328-335,共8页
Journal of the Meteorological Sciences
关键词
山地蒸发
下垫面特性
迳流系数
降水
Evaporation in mountainous areas
Specific property of underlying surface
Coefficient of run-off
