The Ebble rises at
Alvediston, to the west of Salisbury, at . It joins the
River Avon southeast of the city at
Bodenham () after flowing through
Ebbesbourne Wake,
Fifield Bavant, Little London, Knapp, Mount Sorrel,
Broad Chalke, Stoke Farthing,
Bishopstone,
Stratford Tony,
Coombe Bissett,
Odstock and
Nunton. The
River Chalke is the most significant tributary, rising in
Bowerchalke and flowing through the Chalke Valley to join the Ebble at Mount Sorrel in Broad Chalke. The Chalke also provides a steady, year round flow, so that the
winterbourne section of the Ebble is only from Alvediston to Knapp. The flow of the Ebble is augmented at Little London by several pumped boreholes that feed the extensive commercial
watercress farm at Knapp before the confluence with the Chalke. ==Origin of the name==