Sensible heat flux in cowpea

Revista Brasileira de Engenharia Agrícola e Ambiental

Lima, José R. de S⁴  Souza, Eduardo S. de¹  Antonino, Antonio C. D²  Soares, Willames de A³  Lira, Carlos A. B. de O² 

[1] UFRPE, Serra Talhada;UFPE, Recife;UPE, Garanhuns;UFRPE, Garanhuns

关键词: energy balance;    Bowen ratio;    aerodynamic method;    evapotranspiration     INTRODUÇÃOA quantificação dos componentes do balanço de energia é essencial para o planejamento dos recursos hídricos de uma área;    para estimar o fornecimento potencial de água e compreender os efeitos ecológicos decorrentes do desenvolvimento das regiões (Bidlake et al;   

DOI  :  10.1590/S1415-43662011001000007

学科分类：农业科学（综合）

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

【 摘 要 】

A study was performed to compare the bulk aerodynamic (H_A) and Bowen ratio energy balance (H_B) methods in the estimation of the sensible heat flux in a cowpea crop. Data of net radiation, soil heat flux, soil water content, soil temperature, air temperature, relative humidity, wind speed and rainfall were collected on 30-min time intervals in an area of 4 ha belonging to the municipality of Areia, PB (6º 58' 12" S e 35º 42' 15" W, 620 m). Results showed that there was a good agreement between H_A and H_B with an index "d" of 0.98 and standard error of estimate (SEE) of 14.88 W m-2, no significant difference between H_A H_B, by the t-Student test. Thus, the bulk aerodynamic method can be used in conjunction with measurements of net radiation and soil heat flux to estimate the evapotranspiration of the cowpea under soil and climatic condition of the "Brejo Paraibano".

【 授权许可】

CC BY-NC