38004 - Rib at Wadesmill
| Grid Reference: | 52 (TL) 360 174 | 
|
| Operator: | EA |
| Local number: | 4980 |
|
Catchment Area: | 136.5 km2 |
| Level of
Station: | 47.1 mOD |
| Max. Altitude: | 168.0 mOD |
|
Mean flow: | 0.51 m3s-1 |
| 95% exceedance (Q95): | 0.078 m
3s-1 |
| 10% exceedance
(Q10): | 0.922 m3s-1 |
|
61-90 Av. Ann. Rainfall: | 625 mm |
Sample Hydrograph of Gauged Daily Flows
Flow Duration Curve for Gauged
Daily Flows
Station Description
Trapezoidal flume plus side-spilling Crump weir
on the overflow channel. Modular calibration has applied during rare periods of
drowned flow. All except highest floods contained. Daily flow data available
(1957-83) for d/s limited range station (38006). Flows influenced by
significant gw abstractions (net export).Catchment
Description
Geology: U Chalk extensively overlain by boulder clay;
glacial sands and gravel in the valleys. Predominantly rural. Significant
runoff generated from Buntingford, Thundridge and clays high up the catchment.
Factors Affecting Runoff
- Runoff
influenced by groundwater abstraction/recharge.
- 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 |
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Datatype | 1970s | 1980s | 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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