205020 - Enler at Comber

Grid Reference:	33 (IJ) 459 697
Operator:	RA
Catchment Area:	61.8 km²
Level of Station:	4.9 mOD
Mean flow:	0.77 m³s^-1
95% exceedance (Q95):	0.099 m³s^-1
10% exceedance (Q10):	1.726 m³s^-1
61-90 Av. Ann. Rainfall:	934 mm

Sample Hydrograph of Gauged Daily Flows

Flow Duration Curve for Gauged Daily Flows

Station Description

Flat V weir in trapezoidal channel containing the full range of flows. Rating revised following high flow gaugings in 2000/01 (up to 23.6 cumecs), all flows reprocessed (producing substantial reduction in highest flows). High flow rating from current meter gaugings from bridge downstream; simple extrapolation beyond 1.443m (max gauging) Low flows gauged by wading downstream of weir. A limited number of boreholes nearby exist with pumped extraction to water supply. Station vandalised during August 2008 leading to period of missing data.

Catchment Description

Geology predominantly Silurian sandstones with Permian and Triassic sandstones together with limited coverage of Basalt and Dolerite. This is overlain by glacial sands and gravels along the main river valley. Predominantly grassland but highest proportion (26%) of horticulture (mainly potatoes) for any gauged NI catchment. Some urban/suburban development in the upper reaches, Dundonald.

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):	1983 to 2008
Monthly Catchment Rainfall (rnf):	1983 to 2008

Datatype	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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