Table 1 shows the average accumulated precipitation values (mm of rain) per basin, based on precipitation estimates using satellite images, a product called MERGE/GPM, made available by the National Institute for Space Research, for the period 2000 - 2023, taking into account the geographical limits of the Amazon basin's watersheds. To this end, the quantile technique was used, as it is a suitable and accurate tool for categorizing precipitation and anomalies of discrete variables. The following thresholds were adopted: 5%, 12.5%, 20%, 27.5%, 35%, 42.5%, 57.5%, 65%, 72.5%, 80%, 87.5%, and 95% in order to stratify the technique and allow for a more detailed categorization of the conditions in each monitored basin.