In March, the decline in flows continued throughout the basin.
However, in the Upper and Lower Niger sub-basins, a low-water situation is observed, while at the outlet of the Inner Delta and the Middle Niger, a recession situation continues following the end of the Guinean flood.
The emptying of the Sélingué dam in Mali is gradually continuing to support downstream flows, while at Kainji, the water level remains at its full level.
The data used for the various analyses below came from hydrological observation networks of the National Hydrological Services and Dam Authorities of nine (9) member countries of Niger Basin Authority. (NBA)
The flow analysis situation was carried out by dividing the basin into three (4) sub-catchments also represented with reference gauging stations as follows: Upper Niger at Koulikoro (Mali), Inland Delta at Dire (Mali), Middle Niger at Niamey (Niger) and Lower Niger at Lokoja (Nigeria)

Kainji Dam Reservoir: At the Kainji dam in Nigeria, the maximum water level of 141.83 m corresponding to a volume of 15.13 billion m3 was recorded on the 1st of March 2025 while the minimum level of 141.56 m corresponding to a volume of 14.79 billion m3 was recorded on the 31st of March 2025.
The volume of the reservoir as of 31st of March 2025 is 14.79 billion m3 corresponding to a filling rate of 98.58% of normal capacity.
This volume (14.79 billion m3) is higher than the year 2024 (12.08 billion m3), the inter-annual mean (12.01 billion m3) but lower than the year 2023 (14.97 billion m3) during the same period

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