Niger Basin
Station: Ansongo


GRDC Station Information
STN Derived Subbasin Information
Station Name (GRDC ID): Ansongo (1134900) Basin Name: Niger
River Name: Niger Next Downstream Station:Niamey (1234150)
GRDC Country Code: MI Distance to Next Downstream Station: 320 km
Start Year [Month]: 1951 [1] Upstream Station(s): Dire (1134700)
End Year [Month]: 1992 [12]
Mean Discharge: 915 m3/s
Minimum Discharge: 5 m3/s
Maximum Discharge: 2230 m3/s Length of Upstream Mainstem: 1814 km
Mean Interstation Discharge: -88 m3/s Distance to Basin Outlet: 1664 km
GRDC Catchment Area: 566000 km2 STN Catchment Area: 647527 km2
GRDC Interstation Area: 226000 km2 STN Interstation Area: 279627 km2
GRDC Station Runoff: 51 mm/yr STN Station Runoff: 45 mm/yr
GRDC Interstation Runoff: -12 mm/yr STN Interstation Runoff: -10 mm/yr
Station Field DescriptionsBasin Field Descriptions


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Site Descriptor Information Station Time Series Data


Hydrograph Station Data
Extreme Values Over Period Of Record
Month MeanQ
m3/s
MinQ
m3/s
MaxQ
m3/s
Jan 1611.0 440.0 2160.0
Feb 1339.3 168.0 2230.0
Mar 971.4 37.0 2100.0
Apr 556.4 14.0 1710.0
May 203.0 7.0 932.0
Jun 68.0 5.0 344.0
Jul 97.6 5.0 420.0
Aug 502.3 166.0 956.0
Sep 1011.6 666.0 1380.0
Oct 1358.4 971.0 1610.0
Nov 1574.8 1080.0 1820.0
Dec 1684.1 877.0 2000.0