GHAASBasin895 Basin
Station: Polmak


GRDC Station Information
STN Derived Subbasin Information
Station Name (GRDC ID): Polmak (6730500) Basin Name: GHAASBasin895
River Name: Tana Next Downstream Station:None
GRDC Country Code: NO Distance to Next Downstream Station: N.A.
Start Year [Month]: 1912 [1] Upstream Station(s): None
End Year [Month]: 1987 [12]
Mean Discharge: 166 m3/s
Minimum Discharge: 32 m3/s
Maximum Discharge: 1377 m3/s Length of Upstream Mainstem: 289 km
Mean Interstation Discharge: 166 m3/s Distance to Basin Outlet: 56 km
GRDC Catchment Area: 14005 km2 STN Catchment Area: 14035 km2
GRDC Interstation Area: 14005 km2 STN Interstation Area: 14035 km2
GRDC Station Runoff: 373 mm/yr STN Station Runoff: 372 mm/yr
GRDC Interstation Runoff: 373 mm/yr STN Interstation Runoff: 372 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 53.7 37.0 79.0
Feb 46.5 33.0 63.0
Mar 43.1 32.0 59.0
Apr 49.6 33.0 145.0
May 439.5 54.0 1038.0
Jun 537.2 153.0 1377.0
Jul 197.7 92.0 613.0
Aug 159.9 60.0 407.0
Sep 158.4 65.0 443.0
Oct 139.4 64.0 381.0
Nov 96.2 51.0 188.0
Dec 67.3 40.0 114.0