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Normalized difference water indexes have dissimilar performances in detecting seasonal and permanent water in the Sahara–Sahel transition zone

HydrometeorologyEnvironmental MonitoringEngineeringWater ResourcesWater MonitoringGeographySurface-water HydrologyWater QuantityDifference Water IndexesPermanent WaterSahara–sahel Transition ZoneWater Resource AssessmentHydrologyEarth ScienceWater Balance