Development of a system of reference evapotranspiration estimation

Revista Brasileira de Engenharia Agrícola e Ambiental

Belo Filho, Adelgicio F.¹  Silva, Vicente de P. R. da²  Campos, João H. B. da C.²  Silva, Bernardo B. da² 

[1] UFCG;UFCG, Campina Grande

关键词: computer program;    Penman-Monteith approach;    software    INTRODUÇÃO O conhecimento do consumo hídrico das culturas;    obtido com base na estimativa da evapotranspiração;    constitui-se numa informação preciosa no manejo da água;    principalmente no momento em que ocorre forte conscientização popular do uso racional dos recursos hídricos;   

DOI  :  10.1590/S1415-43662005000400017

学科分类：农业科学（综合）

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

【 摘 要 】

This work presents a computer program denominated "Sistema de Estimativa da Evapotranspiração (SEVAP)" with the objective of computing the reference evapotranspiration through different methods. The methods presented in the SEVAP program are: Penman-Monteith, Hargreaves, Jensen-Haise, Linacre, Makkink, Priestley & Taylor, Pan evaporation and Thornthwaite. The performance of the software program was evaluated with climatological data of Petrolina station, Pernambuco state. Mean monthly data and daily data (March to August 2002) of maximum and minimum air temperatures, relative humidity, insolation, wind velocity, Class A pan evaporation and solar radiation were used. The results show that the program produces accurate evapotranspiration values on a monthly and daily basis. In the absence of insolation and wind velocity data the Penman-Monteith method can be replaced by Hargreaves method, with good accuracy.

【 授权许可】

CC BY-NC