Before and after heavy rainfall: upstream
These pictures were taken from the footbridge at the end of Riverside Road in Luton. The before photos were taken at 3.40pm on Tuesday 7 June, with a storm on the way. You can see the river is low and crystal clear at this point. At 4.00pm it started to rain heavily and did so for over an hour and a half; the after photos were taken at 5.20pm (when rain was still falling) and illustrate how quickly and dramatically the river's volume increases as a result of rainfall.