摘要
西藏林芝市气象站点偏少,气象资料局部区域匮乏,采用标准的FAO-56 Penma-Monteith(56PM)法计算参考作物蒸发蒸腾量(ET0)比较困难。选用数据较全的西藏林芝站1956~2009年逐日气象资料,用56PM法计算多年月平均ET0值作为标准值,采用8个指标参数对比6种常用计算ET0的方法。计算结果对比表明,6种计算方法综合排名依次为IA法>17PM法>PT法>HA法>修正PM法>HA校正法。17PM法、PT法及HA法与56PM法具有较好的相关性,HAR法和修正PM法与56PM法相关性较差,IA法及修正后的PT(修正PT)法与56PM法计算结果最为相近,在林芝市气象资料缺失的区域可代替56PM法应用。
There are few meteorological stations in Linzhi area of Tibet, but the meteorological data are scarce in some areas, and it is difficult to calculate reference crop evapotranspiration (ET0) by standard FAO-56 Penman-Monteith (56PM) method.Daily meteorological data of Linzhi station in Tibet from 1956 to 2009 were selected in this paper, and monthly average ET0 values of many years were calculated by 56PM method as standard values.Eight index parameters were used to compare six commonly used methods for calculating ET0.The results showed that the comprehensive ranking of the six methods was IA > 17PM > PT > HA > modified PM > HA.17PM method, and PT method and HA method had good correlation with 56PM method.HAR method and revised PM method had poor correlation with 56PM method.IA method and revised PT (revised PT) method had the closest calculation results with 56PM method.So, it can be used instead of 56PM method in areas where meteorological data are missing in Linzhi area.
作者
杨浩亮
张文贤
次吉拉姆
潘苏向
罗红英
YANG Haoliang;ZHANG Wenxian;Ciji lamu;PAN Suxiang;LUO Hongying(Water Conservancy Project&Civil Engineering College,Tibet Agriculture&Animal Husbandry University,Nyingchi Tibet,860000,China)
出处
《高原农业》
2019年第5期544-550,共7页
Journal of Plateau Agriculture
关键词
林芝
ET0
不同方法
适用性
Linzhi
ET0
different methods
applicability
