The Nailbourne bubbles up beneath St Ethelburga's Well in Tayne Field in the centre of Lyminge. Whilst the stream often holds a plentiful supply of water from Lyminge to Elham throughout the year, it rarely holds any water from Elham to Bishopsbourne even in the winter months. However, in wet years the normally dry ditch can turn into a fast flowing torrent, flooding roads, fields and houses. An example of this was in 2001 when there was extensive flooding throughout the Elham Valley.