Abstract
An integral and efficient management of water for irrigation requires the adoption of new technologies to respond to the challenges imposed by the agricultural sector, in particular to stabilize production through the adequate use of water resources. In this sense, it is vital to characterize and know the amount of area which is under irrigation in such agricultural systems. In this paper we show the use of satellite information data in a GIS environment with the objective of characterizing the productive areas under irrigation in Cruz del Eje, Córdoba, Argentina in 3 types: A) irrigation region B) irrigable area and C) actually irrigated area. Multitemporal image indices and segmentation were used for this characterization and then maps of these 3 types of agricultural land cover were generated. Additionally, we present simple satellite images processing and classification procedures to increase the knowledge about the land cover over this irrigated area. Finally, we discuss how this geographically explicit information generated could be useful for the decision-making process on current irrigated areas and on the potential of productive systems through community irrigation systems.
Highlights
The use of water as an asset of great utility and high abundance in absolute terms, was globally extended until the 1970s [1]
We present a case study applying the methodology for characterization of irrigated areas [8], which operates through a generation model collaborative of cartographic information assuring the premises of quality, standardization and compatibility
Four classifiers were explored on a Sentinel 2A image, pre-processed to surface reflectance
Summary
The use of water as an asset of great utility and high abundance in absolute terms, was globally extended until the 1970s [1]. The irrigated area worldwide quintupled from the second half of the 20th century onwards, reaching 267 million hectares under irrigation [2]. This area represents a 15% of the total cultivated area and it is estimated that 37% of the total crop production is obtained in irrigated areas [3]. In Argentina, the arid and semi-arid regions were the ones that used irrigation the earliest, first through the use of surface water resources and with the use of underground ones These areas show how irrigated agriculture consumes a great percentage of total catchment water, a percentage that exceeds 90%. These data along with the potentially irrigable area of Argentina (more than 6 million ha, currently cultivated under irrigation only 1,635,000 ha) places irrigation as a keystone for water and territory management, demanding adequate and sustainable planning
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