203011 - Main at Dromona

Grid Reference:	34 (ID) 049 090
Operator:	RA
Catchment Area:	243.5 km²
Level of Station:	71.0 mOD
Max. Altitude:	401.0 mOD
Mean flow:	5.59 m³s^-1
95% exceedance (Q95):	0.822 m³s^-1
10% exceedance (Q10):	12.8 m³s^-1
61-90 Av. Ann. Rainfall:	1209 mm

Sample Hydrograph of Gauged Daily Flows

Flow Duration Curve for Gauged Daily Flows

Station Description

Velocity-area station without cableway, controlled by a weir of capped sheet piles. Station was re-sited at ID 049 090 on 1/11/80, retaining same name. Two rating curves - derived from current meter gaugings. No cableway - high flow gauging from bridge. Simple extrapolation used above approx 51m3/s. High flow gauging in 2002 confirmed validity of rating. Water is abstracted from Dungonnell Res. (12.5 Ml/d) - the majority is returned d/s of station.

Catchment Description

Catchment is almost entirely basalt with 70% overlain by till. A rural catchment - predominantly improved grassland. No significant urban development.

Factors Affecting Runoff

Reservoir(s) in catchment affect runoff.

River Flow and Catchment Rainfall on the National River Flow Archive

Gauged Daily Flows (gdf):	1970 to 2008
Monthly Catchment Rainfall (rnf):	1970 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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