Can we assume the maximum avulsion distance is the distance water would travel before it reaches the next crossing?(The guide is currently not clear on whether or not this should be recorded for drainage structures)
The avulsion distance is how long/far the water would travel before (in the new channel it could possibly carve) before meeting back up again with the main channel.
Hi Henry, you do not need to collect this data for drainage structures- the table on Page 8 is correct, but the parameter key for a few variables was incorrect. The avulsion distance is how far the water travels along the side (or on top of the road) before it re-enters the stream downstream.