{'fraction_non_alphanumeric': 0.023094688221709007, 'fraction_numerical': 0.010392609699769052, 'mean_word_length': 4.818791946308725, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Remote Sensing as a Tool for Agricultural Drought Alert Over the South Region of Brazil

– In this study, the estimative of the Combined Drought Index (CDI) to identify agricultural drought over the South Region of Brazil is introduced. The CDI is based on a combination of three indicators: Standardized Precipitation Index, soil moisture anomalies, and Vegetation Health Index. The proposed CDI has four levels—watch, warning, alert I, and alert II— thus beneﬁting an increasing degree of severity. The CDI was applied during the ﬁrst 6 months of 2020 to different study sites over the South Region representa-tive of crop areas. The performance of CDI levels was assessed by comparison with risk areas. Observations show a good match between these areas and the CDI. Important crop drought events in 2020 were correctly predicted by the proposed CDI in all areas.