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Upper Niger River Basin. Inner Delta. Climate: West African monsoon Niger Inner Delta Large region (64 000 km 2 ) with floodplains used for agriculture, fishery and livestock Flooded area varying seasonally with maximum extent ranging from 18000 km 2 to 35000 km 2 Complex hydrodynamics.

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upper niger river basin
Upper Niger River Basin

Inner Delta

  • Climate: West African monsoon
  • Niger Inner Delta
    • Large region (64 000 km2) with floodplains used for agriculture, fishery and livestock
    • Flooded area varying seasonally with maximum extent ranging from 18000 km2 to 35000 km2
    • Complex hydrodynamics
  • Modeling for water resources management
    • Definition of dam releases
    • Depending on water demand, hydric state, available water in reservoirs
    • Hydrology, hydraulics, water demand (allocation)
  • Main limitations
    • Model approximations
    • Data availability (few gauge stations, gaps, delay)
    • Transboundary basin (data sharing)

Use of remote sensing data: SWOT

Fomi

Sélingué

slide2

SWOT data assimilation (every 12 days) in a reservoir model to improve the representation of reservoir levels and then make more efficient dam releases

Markala

forcings

Selingue (2.109 m3)

Fomi (2020, 6.106 m3)

VIC

Upper Niger river basin

SWOT data assimilation (ZSWOT)

Qin

Reservoir

model (Z)

Reservoir

rule (Zrule)

dam release

Qout

slide3

SWOT data assimilation (water level and surface extent) in a hydrodynamic model of the upper Niger river including the Inner Delta to improve reservoir rule (dam release curve)

forcings

VIC

Qin

Inner Delta

Reservoir

model (Z)

Reservoir

rule (Zrule)

Qrelease

SWOT data assimilation (ZSWOT)

Hydrodynamic model (Z,Q)

Qout

Selingue