Effects of variations in climatic parameters on evapotranspiration in the arid and semi-arid regions

被引:52
作者
Eslamian, Saeid [1 ]
Khordadi, Mohammad Javad [1 ]
Abedi-Koupai, Jahangir [1 ]
机构
[1] Isfahan Univ Technol, Dept Water Engn, Coll Agr, Esfahan 8415683111, Iran
关键词
Evapotranspiration; Climatic parameter variability; Arid zone;
D O I
10.1016/j.gloplacha.2011.07.001
中图分类号
P9 [自然地理学];
学科分类号
0705 ; 070501 ;
摘要
The main objective of this study is to investigate the effects of climatic parameters variability on evapotranspiration in five climatologically different regions of Iran. The regions include Tehran, Esfahan, Shiraz, Tabriz and Mashhad. Fifty four-year monthly records of temperature, relative humidity, sunshine duration, wind speed, and precipitation depth from 1951 to 2005 comprise the database. Trend and persistence analyses of the data are performed using the Mann-Kendall test, the Cumulative Deviation test, Linear Regression, and the Autocorrelation Coefficient. A sensitivity analysis of meteorological variables in these five regions is carried out using Penman-Monteith formula. In all of the studied regions, sensitivity analysis reveals that, temperature and relative humidity are the most sensitive parameters in Penman-Monteith formula respectively. The results of this study indicate that the effective climatic variables on evapotranspiration are changing, though in each region the variables have significant long-term trends and persistence. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码:188 / 194
页数:7
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