Journal of Earth & Environmental Waste Management
ISSN: 3065-8799 | DOI: 10.64030/3065-8799
Cris Emanuel Walu and Cheikh Faye
Koliba /Corubal basin, located between Guinea and Guinea-Bissau, is a key region in West Africa due to its major role in freshwater supply. However, climate variability and climate change are severely impacting the management of its water resources. This study aims to analyze the historical climatic conditions of the basin between 1981 and 2024, focusing on trends in extreme rainfall and temperatures. To this end, climate indices such as the SPI (Standardized Index of Precipitation) will be used. Precipitation Index) and the SPEI (Standardized Precipitation Evapotranspiration Index (SPI) is used to assess dry and wet periods, as well as changes in the distribution of extreme temperatures (such as hot days and nights). The results indicate moderate trends in precipitation, with a slight increase in moderate rainy days, but no significant changes in the frequency of extreme precipitation events. In contrast, minimum and maximum temperatures showed an increasing trend, with potential implications for water management and agriculture. Analysis of the SPI and SPEI indices across various timescales revealed an increased trend toward prolonged dry conditions, particularly over the long term (12 to 24 months), highlighting a predisposition of the basin to severe drought periods. This study provides essential information for sustainable water resource management, aiming to strengthen climate change adaptation strategies in the region.