48005 - Kenwyn at Truro

Grid Reference:	10 (SW) 820 450
Operator:	EA
Local number:	3841054
Catchment Area:	19.1 km²
Level of Station:	7.2 mOD
Max. Altitude:	152.0 mOD
Mean flow:	0.38 m³s^-1
95% exceedance (Q95):	0.055 m³s^-1
10% exceedance (Q10):	0.89 m³s^-1
61-90 Av. Ann. Rainfall:	1101 mm

Sample Hydrograph of Gauged Daily Flows

Flow Duration Curve for Gauged Daily Flows

Station Description

Three-bay compound Crump profile weir with central crest length 1.22 m and two side crests of 1.52 m and 1.54 m (4.28 m total). Pier and wing wall height 1.98m. Contains all flows; potential for non-modularity at highest flows. Variable shoaling affects low flow precision. Suspect data 28 July - 23 August 2001, resulting from backing up from an informal weir which was installed immediately downstream of the Crump in June 2001. Substantially natural catchment but flood retention ponds (from January 1991) significantly moderate high flow response. High baseflow, given the catchment relief.

Catchment Description

Catchment of moderate relief on Old Red Sandstone and Devonian grits and shales, with wooded, incised valleys

Factors Affecting Runoff

Natural to within 10% at the 95 percentile flow.

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

Datatype	1960s										1970s										1980s										1990s										2000s

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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