39072 - Thames at Royal Windsor Park

Grid Reference:	41 (SU) 982 773
Operator:	EA
Local number:	2700
Catchment Area:	7046.0 km²
Level of Station:	13.5 mOD
Max. Altitude:	330.0 mOD
Mean flow:	59.26 m³s^-1
95% exceedance (Q95):	15.19 m ³s^-1
10% exceedance (Q10):	128.0 m³s^-1
61-90 Av. Ann. Rainfall:	696 mm

Sample Hydrograph of Gauged Daily Flows

Flow Duration Curve for Gauged Daily Flows

Station Description

Multi-path ultrasonic gauging station superseded, in 1988, original single-path configuration (installed 1978). Some gaps in record. Calibration confirmed by gaugings. All but exceptional floods contained. 01/2003 peak: c405 cumecs. Baseflow from the Chalk and Oolitic L'st, quicker response from the Oxford Clay and Lower London Tertiaries. Station is u/s of the major PWS off-takes for London.

Catchment Description

Scarp and vale topography developed on diverse geology. Predominantly rural headwaters contrast with considerable suburban growth in the lower valley. Representative of large lowland catchments in England.

Factors Affecting Runoff

Regulation from surface water and/or ground water.
Runoff reduced by public water supply abstraction.
Runoff influenced by groundwater abstraction/recharge.
Runoff increased by effluent returns.
Runoff reduced by industrial/agricultural abstraction.

River Flow and Catchment Rainfall on the National River Flow Archive

Gauged Daily Flows (gdf):	1979 to 2008
Monthly Catchment Rainfall (rnf):	1979 to 2008

Datatype	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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