热带地理Issue(6)：737-745,9.
多种蒸散发公式在珠江流域的适用性分析
Applicability of Evapotranspiration Equations for the Pearl River Basin
摘要
Abstract
Based on the daily meteorological data from 42 stations in the Pearl River basin, different evapotranspiration methods including FAO56 Penman-Monteith (PM), Priestley-Taylor, Hargreaves-Samani and Thornthwaite equations were compared to find out the most applicable one for calculating evapotranspiration in the basin. Then the calculation precision of PM formula under the conditions of limited data was analyzed. The results indicate that PM equation is the best one whose calculating result is stable for all seasons and districts and close to the observation data, and thus would be the most suitable formula for the evapotranspiration calculation in the Pearl River basin. To evaluate the influence of limited data on the calculation precision of PM formula, anyone of the data of relative humidity, sunshine duration, wind speed and pressure is assumed to be missing. Among the examined variables, sunshine duration is the most sensitive one to the calculating result, and wind speed follows. By setting a modified factor, the PM equation only based on the temperature data (PMT) still has a high calculation precision. As a result, PMT equation can be an ideal method for evapotranspiration calculation in the Pearl River basin when some variables of data are lacking.关键词
蒸散发/Penman-Monteith公式/计算精度/珠江流域Key words
evapotranspiration/Penman-Monteith equation/calculation precision/the Pearl River Basin分类
天文与地球科学引用本文复制引用
黄强,陈子..多种蒸散发公式在珠江流域的适用性分析[J].热带地理,2014,(6):737-745,9.基金项目
国家自然科学基金 （）
