Abstract
The present investigation was carried out in the Tumbes National Reserve (RNTumbes) to determine the existence of drought, as well as the areas that are under impact from moderate droughts to droughts with abnormal behavior. The objective of the present work was to compare the NDWI and NDDI drought indices and to elaborate thematic maps of the study area. Images were obtained from the United States Geological Survey (USGS), selected from 1986 to 2019. For the determination of drought, the NDWI and NDDI were used. For the NDWI, the areas were determined to analyze the drought behavior and the NDDI was determined for its comparison with the NDWI. The results of this study allow us to conclude on: a) Regarding the drought, the NDWI had values that ranged from -0.5 to 0.7 in the RNTumbes, classifying it as a weak drought and low moisture content; and b) The NDDI in the Tumbes National Reserve reached values between -1189.04 and 1312.02, allowing a classification as humid soils, although they are not at their maximum water storage capacity during the years of this multitemporal analysis.
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