To get a quick overview of water levels and the flooding of the Inner Niger Delta, go to the relevant background information. For spatial information consult the interactive viewer with hydrological information.
The Niger River and its tributaries are a lifeline to the rural and urban communities in the Upper Niger Basin and Inner Niger Delta: they provide water, food and energy and constitute main transportation routes. A proper management of the Niger’s water resources is crucial to these functions and the stakeholders. This important task is dedicated to the Direction Nationale de l‘Hydraulique in Mali and the Direction Nationale de l‘Hydraulique in Guinea.
The hydrological situation in the basins, expressed by water levels and river discharge, are closely monitored in Mali and Guinea already for a very long time by the DNH in Mali and the DNH in Guinea. Water levels are monitored on a daily levels at many stations. Together with information on water intake by reservoirs and irrigations schemes, this form the basis for the daily water management. In this Observatory we present and summarise much of this information; for the source data and up-to-date information on the daily management, we refer to the DNH in Mali and the DNH in Guinea.
As a background and framework, we present in this Section a short outline of the hydrological regime of the Niger River Basin and Inner Niger Delta and the planned and existing infrastructure. The hydrological situation depends on the hydrological regime and is managed trough the available infrastructure. Information on rainfall and water levels in different parts of the basins are essential for the management. For example the management of the inflow and outflow of the reservoir of Lac Sélingué is managed by the ‘Commission gestion des eaux de la retenue de Sélingué et du barrage de Markala’ on the basis of upstream water levels and downstream water intake at Markala by Office du Niger.
This website presents also information on water levels and river flows, based on the long term daily monitoring of water levels at dozens of stations by the DNH in Mali and the DNH in Guinea. Water levels are an essential indicator for water managers. In this Observatoire we present the long term data, for actual water level data we refer to the DNH in Mali and the DNH in Guinea. As background information we show the seasonal variation in flood levels in the Inner Niger Delta for the main stations in the delta, Mopti, Akka and Diré. On the basis of the long term water levels also the annual variation in flood levels is presented. Here, you find also information on the relationship between the annual river flow and the peak water level at Mopti, Akka and Diré. These relationships are important as basis for understanding the relation between discharge and flooding.
This Section is completed with an overview of the flood dynamics of the Inner Niger Delta. We show the relationship between the flood level and the flood extent, and variation in seasonal flooding. Spatial information on the inundation zone is presented, also in an viewer. Using this viewer you can determine the flood extent for each relevant water levels during upcoming water.
All this background information is needed and used to model and forecast the actual flooding. The flood in the Inner Niger Delta is forecasted each flooding season using the tool OPIDIN. OPIDIN stands for ‘Outil de Prédiction des Inondations dans le Delta Intérieur du Niger’ and is based on a model in which flooding characteristics are related to water levels in the delta. With the (automatic) input of rainfall data and actual water levels in Mopti, the tool forecasts the timing and maximal spatial flooding in the delta at the peak of the flood. See flood dynamics of the Inner Niger Delta for more information.