Annual variability of water productivity components in the watershed of Cabeceira Comprida stream, Santa Fé do Sul, Brazil

Daniel N. Coaguila, Fernando B.T. Hernandez, Antônio H. De CTeixeira, Christopher M. Neale, Renato A.M. Franco, Janice F. Leivas

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

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.

Original languageEnglish (US)
Title of host publicationRemote Sensing for Agriculture, Ecosystems, and Hydrology XVIII
EditorsChristopher M. U. Neale, Antonino Maltese
PublisherSPIE
ISBN (Electronic)9781510604001
DOIs
StatePublished - 2016
EventRemote Sensing for Agriculture, Ecosystems, and Hydrology XVIII - Edinburgh, United Kingdom
Duration: Sep 26 2016Sep 28 2016

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume9998
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceRemote Sensing for Agriculture, Ecosystems, and Hydrology XVIII
Country/TerritoryUnited Kingdom
CityEdinburgh
Period9/26/169/28/16

Keywords

  • Actual Evapotranspiration
  • Biomass Production
  • Landsat 8
  • SAFER

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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