Evaluación del nivel de mejora en el monitoreo de sequías a escala regional en Colombia, a partir de indicadores ecohidrologicos basados en teledetecciónEvaluation of the improvement level in drought monitoring in colombia from the integration of ecohydrological indices based on remote sensing Celis Rodríguez, Jorge Andrés; Vanegas Beltrán, Diana Ximena; Vergara Arrieta, Humberto José Resumen a sequía es un complejo fenómeno natural recurrente que se da en diferentes partes del mundo (Liu, y otros, 2016) y según la FAO sus estragos principalmente se asocian a riesgos en la seguridad; en este fenómeno intervienen gran número de variables hidrológicas lo cual dificulta aún más su detección. (National Drought Mitigation Center, 2016) Categoriza las sequías principalmente en meteorológica, agrícola e hidrológica; típicamente se utiliza un índice de detección independiente para cada una de estas sequías. El objetivo principal de esta investigación es evaluar la mejora que existe en la detección de sequías mediante el uso integrado de indicadores eco hidrológicos estimados con datos de monitoreo remoto en comparación con la habilidad individual del índice de precipitación. La zona de estudio determinada correspondió a la cuenca del Río Meta la cual con un área de cerca de 105,000Km2, es un afluente del Orinoco y se ubica en una zona con gran actividad agrícola, ganadera, piscícola y minero energética. Abstractrought is a worldwide phenomenon representing a risk for food security and water resources management. Predicting drought presents difficulties due the number of hydrological variables and processes involved in it. Drought is usually categorized and estimated with individual indices targeting a specific nature: meteorological, hydrological or agricultural drought. The main objective of this research was to evaluate the improvement on drought detection through the integrated use of multiple remote-sensing based ecological and hydrological indices compared to the individual use of each of the indices. The study area was the Meta River catchment, an affluent of the Orinoco River with an approximated drainage of 105,000 km2 and located on the eastern region of Colombia. A motivation of this study is that the proposed remote-sensing based approach can serve as a complementary tool for drought detection in this region; wherein-situ ground measurement stations with limited spatial coverage represent the only source of information.Recibido /
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