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Sentinel image to estimating water use by type of source in "La Laguna" Mexico
Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org
Citation: 2022 ASABE Annual International Meeting 2200543.(doi:10.13031/aim.202200543)
Authors: Jorge Flores-Velazquez, Eduardo Gutierrez
Keywords: Remote sensing, corn production, saving water, water reuse.
Abstract. Irrigation Districts (DR) and Irrigation Units (UR) occasionally share fictitious borders that complicate the definition of boundaries between them. Knowing these limits allows to regulate the water consumption that each system has concessioned and consequently it can be used. The objective of this work was to discriminate, based on remote sensing techniques, the irrigated surface in the DR017-UR complex, in order to establish the irrigation volumes used by type of source (surface-underground). Sentinel-2 satellite images were used to define the polygons of the plots, together with the calculation of the Normalized Vegetation Index (NDVI), the irrigated areas are defined. To know the irrigation volumes, the agricultural statistics of CONAGUA were used. Crop evapotranspiration was estimated using the Penman-Monteith model, with climatic databases from the Rapid Climatic Information Extractor (ERIC3). With irrigation sheets and defined surfaces, the volumes of water used were estimated. A difference in watering time implies watering from a different type of source. From the analysis in the study areas with sentinel-2 images, 64,783.17 ha were estimated in the DR, 34,989.99 ha correspond to the UR, a total of 99,773.16 ha. Consequently, the volume used by type of source was 680.41 Mm3 yr-1 for UR and 345.62 Mm3 yr-1 for DR. In the PV period, 403.53 Mm3 yr-1 are estimated and in the RO 78.14 Mm3 yr-1. In perennial crops 476.68 Mm3 year-1 and Intermediate 67.66 Mm3 year-1. The use of sentinel-2 satellite images through the remote technique is a tool for diagnosing and evaluating the use of groundwater and surface water; its monitoring contributes to the control of water use and can avoid excesses and contamination.
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