Satellite methodologies for rationalising crop water requirements in vulnerable agroecosystems
by Nicolas R. Dalezios; Anna Blanta; Athanasios Loukas; Marios Spiliotopoulos; Ioannis N. Faraslis; Nicholas Dercas
International Journal of Sustainable Agricultural Management and Informatics (IJSAMI), Vol. 5, No. 1, 2019

Abstract: Vulnerability in agriculture is influenced, among others, by extended periods of water shortage in regions exposed to droughts. In order to assess irrigation water requirements, remote sensing (RS) techniques are integrated for the estimation and monitoring of cotton crop evapotranspiration ET_c. Cotton fields in a small agricultural sub-catchment in Thessaly, Central Greece, are used as an experimental site. Daily meteorological data and weekly field data are recorded throughout seven (2004-2010) growing seasons for the computation of reference evapotranspiration ET_o, crop coefficient K_c and cotton crop ET_c based on conventional data, which are compared during the corresponding period with the satellite-based method (Landsat TM) for the estimation of cotton crop coefficient K_c and cotton crop ET_c, which also delineates its spatiotemporal variability. The methodology is applied for monitoring K_c and ET_c during growing season in the selected sub-catchment. Several error statistics are used showing very good agreement with ground-truth observations.

Online publication date: Mon, 05-Aug-2019

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