They had built up the fabric in their minds again and could even feel some weary well-being as they neared Weem and saw it sheltering between the steep hills and the flood plain of the Tay. BNC
For example, there is a wide flood plain alongside the River Severn and a great embayment of flat land covered by drainage ditches south of Apperley in Deerhurst. BNC
What happened was that farmers, seeking more land, encroached into the flood plain where the river had split into a number of channels. BNC