气象资料缺测条件下武汉地区计算ET_0方法适用性分析  

Applicability Analysis of Calculation Methods for ET_0 with Limited Weather Data in Wuhan

作　　者：何军[1] 崔远来[1] 李远祥[2] 

机构地区：[1]武汉大学水资源与水电工程科学国家重点实验室,武汉430072 [2]西北勘测设计研究院三峡工程建设监理中心,湖北宜昌443133

出　　处：《中国农村水利水电》2009年第10期68-71,75,共5页China Rural Water and Hydropower

基　　金：教育部博士点基金(20050486002);国家科技支撑计划子题(2006BAD11B08-3)部分内容

摘　　要：运用Priestley-Taylor公式、Hargreaves公式和Penman-Monteith公式,对武汉市各典型水文年参考作物腾发量ET0进行计算,以Penman-Monteith公式的计算结果为标准,对Priestley-Taylor和Hargreaves公式的计算结果的适用性进行分析。结果表明:各典型年Hargreaves公式计算的ET0值与Penman-Monteith公式的计算值无显著性差,在气象资料缺测的条件下可直接代替Penman-Monteith公式在该地区使用;而Priestley-Taylor公式与Penman-Monteith公式计算结果有很大差异,使用前须进行修正。The reference crop evapotranspiration of each typical hydrological year in Wuhan is calculated by Priestley-Taylor formula, Hargreaves formula and Penman-Monteith formula. Based on the results of Penman-Monteith formula, the outcomes of Priestley- Taylor formula and Hargreaves formula are analyzed. It shows that there is no significant difference between the results of Hargreaves formula and those of Penman-Monteith formula. When the weather data required by Penman-Monteith formula is unavailable in this district, Hargreaves formula can be used to calculate ET0 instead of Penman-Monteith formula. There are many differences between the results of Priestley-Taylor formula and those of Penman-Monteith formula, Priestley-Taylor formula needs modifying when used to calculate ET0 instead of Penman-Monteith formula in this district.

关 键 词：Priestley-Taylor公式 Hargreaves公式 PENMAN-MONTEITH公式 ET0 

分 类 号：S271[农业科学—农业水土工程]