39129 - Thames at Farmoor
| Grid Reference: | 42 (SP) 438 068 | 
|
| Operator: | EA |
| Local number: | 1100 |
|
Catchment Area: | 1608.6 km2 |
| Level of
Station: | 60.0 mOD |
| Mean flow: | 15.49
m3s-1 |
| 95% exceedance
(Q95): | 0.904 m3s-1 |
| 10% exceedance (Q10): | 40.6 m
3s-1 |
| 61-90 Av. Ann. Rainfall: | 731 mm
|
Sample Hydrograph of Gauged Daily Flows
Flow Duration
Curve for Gauged Daily Flows
Station Description
Multi-path cross-configuration
ultrasonic gauging station d/s of intake for Farmoor Res. Drought flow accuracy
uncertain (v. low velocities) and gaugings suggest that flows may be
overestimated by around 5%. Naturalised flows not routinely calculated.
Substantial left-bank by-passing (not via the Thames itself) under flood
conditions. Levels affected by d/s gate movements, abstractions and lockages.
Catchment Description
Catchment is
predominantly rural u/s of the station. Geology: mixed - pervious headwaters
(Oolitic l'st), Oxford Clay in the lower reaches.
Factors Affecting Runoff
- Runoff reduced by public water
supply abstraction.
River Flow and Catchment
Rainfall on the National River Flow Archive
|
Gauged Daily Flows (gdf): | 1992 to 2008 |
| Monthly Catchment Rainfall
(rnf): | 1992 to 2008 |
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| Datatype | 1990s | 2000s |
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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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