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Hydrological bulletins
January 2022 Monthly Bulletin PDF Print E-mail
Wednesday, 16 March 2022 10:02

The hydrological flow situation of the Niger basin during the month of January was marked by a low flow in the Upper Niger basin and in the Lower Niger basin. However, a decreasing flow situation is observed at the Inner Delta and the Middle Niger due to the low flows of the Guinean flood, which began in these parts of the basin since November 2021.
The Selingué dams in Mali and Kainji in Nigeria have begun to release water moderately to support the low flow situation downstream of the dams.
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.
The flow analysis situation was carried out by dividing the basin into four (4) sub-catchments also represented with reference gauging stations as follows: Upper Niger at Koulikoro (Mali), Inland Delta at Dire (Mali), Middle Niger in Niamey (Niger) and Lower Niger at Lokoja (Nigeria)

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Bulletin Mensuel DĂ©cembre 2021 PDF Print E-mail
Tuesday, 08 March 2022 13:52

During December 2021, the decline that began in early November continues in the Upper Niger, the Inner Delta and the Lower Niger. On the other hand, the flood coming from the upper basin continues its evolution in the middle Niger.
The Selingué dams in Mali and Kainji in Nigeria have started gradual releases to support downstream flows.
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.
The flow analysis situation was carried out by dividing the basin into four (4) sub-catchments also represented with reference gauging stations as follows: Upper Niger at Koulikoro (Mali), Inland Delta at Dire (Mali), Middle Niger in Niamey (Niger) and Lower Niger at Lokoja (Nigeria)

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Bulletin Mensuel Novembre 2021 PDF Print E-mail
Tuesday, 08 March 2022 13:43
There are no translations available.

Le mois de novembre est caractérisé par un étiage dans le Niger Supérieur tandis que le Delta Intérieur, le Niger Moyen et le Niger Inférieur ont connu une augmentation des débits malgré l'arrêt des précipitations. Cela était dû à la prédominance des crues noires dans le delta intérieur qui n'avaient pas d'impacts négatifs respectivement au Niger moyen et au Niger inférieur.
Les remplissages des barrages de Selingué au Mali et de Kainji au Nigeria ont atteint leur niveau maximum. Le barrage de Sélingué est en situation de déversement.
Les données utilisées pour les différentes analyses ci-dessous proviennent des réseaux d’observations hydrométriques des Services Hydrologiques Nationaux et des Agences de barrages des neuf (9) pays membres de l’Autorité du Bassin du Niger (ABN).
L’analyse des écoulements dans les quatre sous-bassins du Niger est faite aux stations hydrométriques de référence, à savoir Koulikoro (Mali) pour le Niger Supérieur, Diré (Mali) pour le Delta Intérieur, Niamey (Niger) pour le Niger Moyen et Lokoja (Nigeria) pour le Niger Inférieur

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October 2021 Monthly Bulletin PDF Print E-mail
Wednesday, 08 December 2021 08:47

The month of October marks the end of the rainy season and the beginning of the black flood in the Middle Niger. However, the black flood has also continued to rise in the Inland Delta. The Upper Niger and the Lower Niger is witnessing decrease in flow since the end of the month of September.
The filling of the Selingué dams in Mali and Kainji in Nigeria are in progress and have reached their maximum level. The Sélingué dam is in a spill situation.
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.
The flow analysis situation was carried out by dividing the basin into four (4) sub-catchments also represented with reference gauging stations as follows: Upper Niger at Koulikoro (Mali), Inland Delta at Dire (Mali), Middle Niger in Niamey (Niger) and Lower Niger at Lokoja (Nigeria)

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September 2021 Monthly Bulletin PDF Print E-mail
Tuesday, 26 October 2021 12:45

The month of September has witnessed a decline in rainfall intensity in all compartments of the Niger basin. As a result, the river's water level has begun to recede especially in the Upper and Lower Niger. On the other hand, the flood wave from the upper Niger continues to fill the Inner Niger Delta causing the water level to rise.
The filling of the Selingué dams in Mali and Kainji in Nigeria are in progress and have almost at their maximum 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.
The flow analysis situation was carried out by dividing the basin into four (4) sub-catchments also represented with reference gauging stations as follows: Upper Niger at Koulikoro (Mali), Inland Delta at Dire (Mali), Middle Niger in Niamey (Niger) and Lower Niger at Lokoja (Nigeria)

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August 2021 Monthly Bulletin PDF Print E-mail
Wednesday, 06 October 2021 08:26

The month of August saw an increase in rainfall in all compartments of the Niger basin. As a result, the river's water level rose sharply causing flooding, especially in the lower Niger.
The reservoir filling of Sélingué Dam in Mali and Kainji Dam in Nigeria has started respectively during the second and the third decade of July 2021 respectively.
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.
The flow analysis situation was carried out by dividing the basin into four (4) sub-catchments also represented with reference gauging stations as follows: Upper Niger at Koulikoro (Mali), Inland Delta at Dire (Mali), Middle Niger in Niamey (Niger) and Lower Niger at Lokoja (Nigeria)

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July 2021 Monthly Bulletin PDF Print E-mail
Monday, 23 August 2021 19:21

In July, precipitation is installed on all compartments of the Niger Basin, with runoff coefficients higher than in June, at the beginning of the rainy season, due to the gradual saturation of soils. The flood in June is then replaced by a steady flow increase across the entire Niger Basin.
The reservoir filling of Sélingué Dam in Mali and Kainji Dam in Nigeria has started respectively during the second and the third decade.
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.
The flow analysis situation was carried out by dividing the basin into four (4) sub-catchments also represented with reference gauging stations as follows: Upper Niger at Koulikoro (Mali), Inland Delta at Dire (Mali), Middle Niger in Niamey (Niger) and Lower Niger at Lokoja (Nigeria)

Download the July 2021 Monthly Bulletin

 
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