Added 17/11/2010  You are here: Jubilee River Home Page > Jubilee River - key facts > The Jubilee River Story > How to contact me > Jubilee River guided tours

< PREVIOUS PAGE            NEXT PAGE >         INDEX >    ARCHIVE INDEX >

The Jubilee River story - Afflux at Black Potts

You will need to know that afflux (from Google) - is the rise in water level (above normal) on the upstream side of a bridge or obstruction caused when the effective flow area at the obstruction is less than the natural width of the stream immediately upstream of the obstruction.

The image below taken in July 2007 clearly shows the significant step or jump in the water levels at Black Potts as a consequence of sub-standard design i.e. insufficient cross-sectional area.

For further technical details please see The Conveyance and Afflux Estimation System