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Hydrological bulletins
December 2020 Monthly Bulletin PDF Print E-mail
Thursday, 14 January 2021 17:11

The river Niger flow regime is characterized by low flow situation at the Upper Niger and Lower Niger sub-catchments, and flood situation is observed at the Inner Delta and Middle Niger sub-catchments due to the continuation of the Guinean flood (Black Flood) that began since October 2020.
The floods occurred at the end of December 2020 in certain localities of the city of Niamey are linked to the degradation of dike in certain points during the exceptional flooding of August and September 2020.
The releases of the Sélingué dam in Mali and Kainji dam in Nigeria began on December 3rd and 20th, 2020, 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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November 2020 Monthly Bulletin PDF Print E-mail
Tuesday, 22 December 2020 12:38

The flow recession that started since the beginning of October 2020 continues in most of the Niger basin, with increasingly marked low water levels in Upper and Lower Niger. On the other hand, the Guinean flood continues to rise in November in the Inner Delta and Middle Niger.
The reservoirs of Sélingué in Mali and Kainji in Nigeria have reached the normal filling 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) subcatchments 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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October 2020 Monthly Bulletin PDF Print E-mail
Friday, 20 November 2020 14:41

The month of October 2020 marks the end of rainy season in the entire Niger River basin. There is decline in flows that began at the beginning of October in the Upper Niger and Lower Niger, this continues at all the stations in these part of the basin.
While at the Inner Delta and the Middle Niger, the water level is rising due to the arrival of Black flood (Guinea Flood). The reservoirs of Sélingué in Mali and Kainji in Nigeria have reached the normal filling 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) subcatchments also represented with referencegauging 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 2020 Monthly Bulletin PDF Print E-mail
Wednesday, 21 October 2020 10:11

The month of September was characterized by continued flooding in the Inner Delta and Lower Niger. However, there is a beginning of the recession in the Upper Niger and Middle Niger sub-basins, thus marking the beginning of the end of the rainy season. The peak flow of the exceptional local flood at the Niamey hydrometric station was the cause of serious flooding with loss of human lives and very significant damage. This was the highest flow ever recorded in Niamey since observations began in 1929.Hydrogramme Koulikoro September 2020
At the level of the structuring dams of Sélingué in Mali and Kainji in Nigeria, the filling of reservoirs has started because of the contribution from rainfall seasons.
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 2020 Monthly Bulletin PDF Print E-mail
Tuesday, 29 September 2020 08:07

The month of August was characterized by continued rise in flow throughout the entire Niger basin. During the middle of August 2020, the flow at Middle Niger recorded an exceptional local flood resulting from heavy rainfall and inflows from the main tributaries of the right bank river Niger (Gorouol, Dargol, Sirba, Diamangou, MĂ©krou, Alibori and Sota).Lokoya
At the level of the structuring dams of Sélingué in Mali and Kainji in Nigeria, the filling of reservoirs has started because of the contribution from rainfall seasons.
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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June 2020 Monthly Bulletin PDF Print E-mail
Wednesday, 22 July 2020 10:58

The month of June marks the commencement of the hydrological year in the Niger Basin. The precipitation recorded in all the River Niger Catchments occurs a rise in flow which is characterized by flash floods, at the rate of local rainfall. The average monthly flow recorded show an increasing flow from upstream to downstream. The discharging of water reservoirs from structural dams continues to support the downstream flow.
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 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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Annual hydrological report of the Niger Basin year 2019/2020 PDF Print E-mail
Monday, 06 July 2020 19:34

The Niger River has its source from the Fouta-Djalon Plateau more than 1000m altitude in Guinea and successively flows through Mali, Niger, Benin and Nigeria where it empties into the Atlantic Ocean after a span of around 4200 km. It is the third longest river in Africa (after the Nile and the Congo), the 14th in the world and the 9th by its drainage basin (2,170,500 km2). The active watershed covers an area of approximately 1,500,000 km2 shared by the nine (9) countries within the Niger Basin Authority catchments: Benin (2%), Burkina Faso (4%), Cameroon (4%), CĂ´te d'Ivoire (1%), Guinea (6%), Mali (26%), Niger (23%), Nigeria (33%) and Chad (1%). The River Benue which rises from Adamawa Plateau, Cameroon, to join the main course of River Niger at Lokoja in Nigeria, this is one of its most important tributaries.
The hydrological year of the River Niger starts from June 1st of a year to May 31st of the following year. The annual assessment of the River Niger flow in hydrological year 2019/2020 analyzes the flow situation at designated stations of the different sub-basins: Koulikoro (Mali) for Upper Niger, Diré (Mali) for the Inner Delta; Niamey (Niger) for Middle Niger and Lokoja (Nigeria) for Lower Niger.
The monitoring of River Niger flow during the hydrological year 2019/2020 was carried out under the framework of the activities of the Niger Basin Observatory from 113 hydrometric stations belonging to the hydrological observation networks of National Hydrological Services (NHS) of NBA’s  nine (9) member countries. These stations were equipped with gauge scales, some of which are associated with Satlink-type data collection platforms (PCD) (data transmission by satellite) or electronic Liminigraphs (transmission by GSM). All these hydrometric stations have an gauge reader who takes reading on a daily basis and monitors the equipment.
The databases of the NHSs and the Executive Secretariat of the NBA are managed by HYDROMET software to facilitate the exchange of data. The data received were duly analyzed and stored in the hydrometric database of the NBA Executive Secretariat.

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