|
Thursday, 14 September 2023 08:05 |
|
There are no translations available.
Le Fleuve Niger prend sa source dans les plateaux du Massif du Fouta-Djalon à plus de 1 000 m d'altitude en Guinée et traverse successivement le Mali, le Niger, le Bénin et le Nigeria où il se jette dans l’Océan Atlantique après un parcours d’environ 4 200 km. C’est le troisième plus long fleuve d’Afrique (après le Nil et le Congo), le 14ème du monde et le 9ème par son bassin de drainage (2 170 500 km2). Son bassin versant actif couvre une superficie d’environ 1 500 000 km2 que se partagent les neuf (9) pays regroupés au sein de l’Autorité du Bassin du Niger : le Bénin (2%), le Burkina Faso (4%), le Cameroun (4%), la Côte d’Ivoire (1%), la Guinée (6%), le Mali (26%), le Niger (23%), le Nigeria (33%) et le Tchad (1%). La Bénoué qui prend sa source au Cameroun, reçoit les apports de la rivière Mayo Kebbi du Tchad, avant de rejoindre le cours principal du Fleuve Niger à la confluence de Lokoja au Nigeria, est son affluent le plus important.
L’année hydrologique du fleuve Niger va du 1er juin d’une année au 31 mai de l’année suivante.
 En raison des différences entre les caractéristiques physiographiques et climatiques, le bassin du fleuve Niger est subdivisé en 4 sous-bassins : le Niger Supérieur, le Delta Intérieur, le Niger Moyen et le Niger Inférieur. Ce bilan annuel du fleuve Niger pour l’année hydrologique 2022/2023 fait l’analyse de la situation des écoulements aux stations représentatives des différents sous bassins : 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 (Voir Fig.1.a)
Le suivi des écoulements au cours de l’année hydrologique 2022/2023 a été assuré dans le cadre des activités de l’Observatoire du Bassin du Niger à partir d’une centaine de stations hydrométriques issues des réseaux d’observations hydrologiques des Services Hydrologiques Nationaux et des Agences de barrages des pays membres de l’ABN. Ces stations sont équipées de plates-formes de collecte de données (PCD) de type Satlink, des Liminigraphes électroniques avec ou sans transmission GSM, ou de simples échelles limnimétriques avec un agent observateur qui assure les lectures quotidiennes.
Télécharger le bilan hydrologique 2022-2023 du Bassin du Niger |
|
|
Thursday, 24 August 2023 07:10 |
|
 With increasingly abundant rainfall, the month of July was characterized by a sustained and faster increase in flows in all compartments of the Niger basin causing some flooding in the lower Niger.
The filling of the Selingué reservoir in Mali and the Kainji reservoir in Nigeria began following the rhythm of the rains in the last dekad of July.
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
Download the July 2023 Monthly Bulletin
|
|
Friday, 18 August 2023 07:29 |
|
 The month of June marks the beginning of the hydrological year in the Niger basin. Thus, some rainfall was recorded in all compartments of the Basin. These precipitations recorded during the month allowed the flow to increase over the entire Basin.
The releases of Selingué reservoir in Mali and Kainji reservoir in Nigeria are gradually on-going to support the 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 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)
Download the June 2023 Monthly Bulletin
|
|
Tuesday, 20 June 2023 18:08 |
|
May marks the end of the hydrological year in the Basin. The hydrological situation of the Niger Basin during the month was characterized by the continuation of the low water situation throughout the Basin. However, localized rainfall was recorded in some compartments of the Basin, particularly in the Upper Niger and Lower Niger.
The releases of Selingué reservoir in Mali and Kainji reservoir in Nigeria are gradually on-going to support the 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 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)
Download the May 2023 Monthly Bulletin
|
|
Wednesday, 31 May 2023 07:22 |
|
The hydrological flow situation in the Niger basin during the month of April was characterized by a continuation of low flow situation in the entire basin. However, there are some localized rainfalls recorded in some parts of the Upper and Lower Niger sub-basins.
The releases of Selingué reservoir in Mali and Kainji reservoir in Nigeria are gradually on-going to support the 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 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)
Download the April 2023 Monthly Bulletin
|
|
Tuesday, 18 April 2023 07:47 |
|
 The hydrological flow situation of the Niger basin during the month of March was marked by a low flow in all the compartments of the Basin.
The releases of Selingué reservoir in Mali and Kainji reservoir in Nigeria are gradually on-going to support the 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 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) and Middle Niger in Niamey (Niger).
Note: The hydrological flow situation at the Lower Niger sub-basin was not analyzed due to lack of data from the Lokoja station.
Download the March 2023 Monthly Bulletin
|
|
Wednesday, 22 March 2023 17:22 |
|
 The hydrological flow situation of the Niger basin during the month of February was marked by a low flow in all the compartments of the Basin.
While the low water level continues in the Upper and Lower Niger sub-basins, there was also a decline flow in the Inner Delta and Middle Niger during the first decade of February 2023 due to decline of Guinean flood.
The Selingué dams in Mali and Kainji in Nigeria have begun 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 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) and Middle Niger in Niamey (Niger) and Lower Niger (Lokoja) Nigeria
Download the February 2023 Monthly Bulletin
|
|
|
|
|
<< Start < Prev 1 2 3 4 Next > End >>
|
|
Page 2 of 4 |
