55018 - Frome at Yarkhill

Grid Reference:32 (SO) 615 428
Operator:EA
Local number:55018
Catchment Area:144.0 km2
Level of Station:55.4 mOD
Max. Altitude:244.0 mOD
Mean flow:1.18 m3s-1
95% exceedance (Q95):  0.152 m 3s-1
10% exceedance (Q10):  2.545 m3s-1
61-90 Av. Ann. Rainfall:  706 mm

Sample Hydrograph of Gauged Daily Flows

Flow Duration Curve for Gauged Daily Flows

Station Description

Velocity-area station using a road bridge with a flat, insensitive invert and an adjacent box culvert as low and medium range controls. Broad floodplains operate above 2m when the Lodon tributary may bypass station on rb. Floodplain on lb (above 2.5m) is very wide (0.8 km). No dmfs 15-26/9/98 due to recalibration problems at the station. Natural flow regime.

Catchment Description

Subdued relief, relatively low rainfall. Catchment consists of bedrock of very low permeability. D/s of 55028 lithology changes from Old Red Sandstone to ORS marls. Rural catchment, mixed farming (50% grassland, 35% arable) with livestock on higher ground.

Factors Affecting Runoff

River Flow and Catchment Rainfall on the National River Flow Archive

Gauged Daily Flows (gdf): 1968 to 2008
Monthly Catchment Rainfall (rnf):1968 to 2008
                                                          
Datatype1960s1970s1980s1990s2000s
gdf           
rnf         
                                                         

For many stations monthly peak flows are also archived. When daily flow data are not available monthly mean flows may be held on the National River Flow Archive. See Data Holdings for further information.

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