Reference evapotranspiration in the irrigated perimeters of the state of Sergipe

Revista Brasileira de Engenharia Agrícola e Ambiental

Sabino, Fabiana G.¹  Silva, Vicente de P. R. da²  Azevedo, Pedro V. de²  Sousa, Inajá F. de¹  Silva, Bruce K. N.¹  A. Netto, Antenor de O.¹ 

[1] UFS, São Cristóvão;UFCG, Campina Grande

关键词: water requirements;    evaporation;    Penman-Monteith method;    irrigation scheduling    INTRODUÇÃO O conhecimento sobre o consumo hídrico das culturas;    obtido com base na estimativa da evapotranspiração;    constitui uma informação preciosa no manejo da água em qualquer região do planeta;    principalmente agora em que ocorre forte conscientização popular em relação aos recursos hídricos;    em referência a décadas anteriores (Campos et al;   

DOI  :  10.1590/S1415-43662010000600010

学科分类：农业科学（综合）

来源: Universidade Federal de Campina Grande * Centro de Ciencias e Tecnologia

【 摘 要 】

The knowledge of reference evapotranspiration (ETo) is essential for the irrigation scheduling of crops throughout the world. This work used daily meteorological data of Class A pan evaporation, maximum and minimum air temperatures, insolation, wind speed at 2 m above surface and relative humidity from 1989 to 1993 for four irrigated perimeters of Sergipe. These data were used for estimating ETo based on the following methods: Class A pan evaporation, Solar Radiation, Hargreaves & Samani, Linacre and Penman-Monteith (FAO/56). The daily values of ETo were compared to those obtained by FAO Penman-Monteith method in order to choose the best method of estimating ETo for the region. The best performance was obtained for those models which used the solar radiation as the data input. The Class A pan evaporation method did not show favorable performance in any irrigated perimeter.

【 授权许可】

CC BY-NC