Título:	Annual variability of water productivity components in the watershedof Cabeceira Comprida stream, Santa Fé do Sul, Brazil.
Autoria:	COAGUILA, D. N. HERNANDEZ, F. B. T. TEIXEIRA, A. H. de C. NEALE, C. M. FRANCO, A. M. LEIVAS, J. F.
Afiliação:	Daniel N. Coaguila, UNESP; Fernando B. T. Hernandez, UNESP; ANTONIO HERIBERTO DE C TEIXEIRA, CNPM; Christopher M. Neale, Water for Food Global Institute at the University of Nebraska; Renato A. M. Franco, UNESP; JANICE FREITAS LEIVAS, CNPM.
Ano de publicação:	2016
Referência:	Proceedings of SPIE - International Society for Optical Engineering, v. 9998, p. 99981E-1 - 99981E-10, 2016.
Conteúdo:	The Cabeceira Comprida stream's watershed, located in Santa Fé do Sul, Brazil, is an agroecosystem with great demand of water for the population and agriculture. During the dry season the water demand exceeds the amount generated by the watershed. It is important to know the dynamics of the water above the ground to improve the water resources management. Ten Landsat 8 images were used combined with Northwestern São Paulo State Weather Network data under different thermohydrological conditions of the year 2014 to quantify actual evapotranspiration (ETa), biomass production (BIO) and water productivity (WP) based on ETa. Using the Simple Algorithm for Retrieving evapotranspiration (SAFER) for calculating ETa, the Monteith's radiation model was applied for estimating the BIO and for calculation of WP the ratio of BIO and ETa. The average pixels for ETa, BIO and WP ranged respectively from 0.38 ± 0.35 to 2.05 ± 0.76 mm day-1; 10.15 ± 12.19 to 71.61 ± 35.54 kg ha-1 day-1; 1.89 ± 0.76 to 3.88 ± 0.86 kg m-3. The lower values of ETa (0.38 mm day-1; DOY 220), BIO (10.15 kg ha-1 day-1; DOY 220) and WP (1.89 kg m-3; DOY 204) were obtained in winter, and highest values of ETa (2.05 mm day-1; DOY 364) and BIO (71.64 kg ha-1 day-1; DOY 364) in the summer and WP (3.88 kg m-3; DOY 92) in the autumn. The water productivity components can subsidize the monitoring of the agro-ecosystems, being a useful tool to quantify the annual variability of ETa and BIO.
NAL Thesaurus:	biomass production
Palavras-chave:	Actual evapotranspiration SAFER Evapotranspiração real Produção de biomassa Landsat 8
Digital Object Identifier:	10.1117/12.2242007
Tipo do material:	Artigo de periódico
Acesso:	openAccess
Aparece nas coleções:	Artigo em periódico indexado (CNPM)