River Lavant, West Sussex
The source of the Lavant at East Dean pond
|Source||East Dean, West Sussex|
|Length||14.5 km (9 mi)|
|Discharge||for Graylingwell |
|- average||0.3 m3/s (11 cu ft/s)|
|- max||7.8 m3/s (275 cu ft/s) 14 December 2000|
|- min||0.0 m3/s (0 cu ft/s) 28 December 2005|
|Wikimedia Commons: River Lavant|
The River Lavant is a winterbourne that rises at East Dean and flows west to Singleton, then south past West Dean and Lavant to Chichester. From east of Chichester its natural course was south to the sea at Pagham, but the Romans diverted it to flow around the southern walls of Chichester and then west into Chichester Harbour.
In January 1994 heavy rainfall caused the River Lavant to burst its banks, causing extensive flooding in Chichester and surrounding villages and forcing the closure of the A27 and A259 roads. Military "Green Goddess" fire engines were stationed in the city for several weeks pumping out ground water through miles of pipes. When exceptionally high rainfall in the autumn of 2000 threatened renewed flooding of Chichester an emergency project was led by the Environment Agency, using emergency powers to build a relief channel to divert excess water back into the natural route of Pagham Rife. This brought forward work planned for 2001, compressing it into two weeks, and was completed days before the anticipated flood surge in the River Lavant occurred. The emergency work was subsequently made into a permanent relief channel, with sluices at Westhampnett.
- Ken Newbury; The River Lavant
- Marsh, T; Hannaford, J, eds. (2008). UK Hydrometric Register. Hydrological data UK series. Wallingford, Oxfordshire: Centre for Ecology & Hydrology. ISBN 978-0-9557672-2-7.
- Article in The Independent
- University of Manchester case study into managing unexpected urgent projects