27057 - Seven at Normanby
| Grid Reference: | 44 (SE) 737 821 | 
|
| Operator: | EA |
| Local number: | 8912540 |
|
Catchment Area: | 121.6 km2 |
| Level of
Station: | 28.5 mOD |
| Max. Altitude: | 432.0 mOD |
|
Mean flow: | 1.94 m3s-1 |
| 95% exceedance (Q95): | 0.182 m
3s-1 |
| 10% exceedance
(Q10): | 3.506 m3s-1 |
|
61-90 Av. Ann. Rainfall: | 875 mm |
Sample Hydrograph of Gauged Daily Flows
Flow Duration Curve for Gauged
Daily Flows
Station Description
Limited range Crump profile weir, 8m wide.
Theoretical rating. Low modular limit. Drowns well before QMED so high flows
are of limited precision. Magnitude of August 2002 flood under review, but
undoubtedly exceptional - triggered by > 100mm storm. Loss of water
underground to the adjacent R. Dove (27042) has significant impact on summer
baseflow.Catchment Description
Geology:
Jurassic L'st, shales and s'sts. Rural catchment with moorland headwaters.
Contains significant areas of forestry.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): | 1974 to 2008 |
| Monthly Catchment Rainfall (rnf): | 1974
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.
NRFA Home Page
Station Summaries
Regional Maps
Data Holdings