flowage

from WordNet (r) 3.0 (2006)

flowage
    n 1: gradual internal motion or deformation of a solid body (as
         by heat); "rock fracture and rock flowage are different
         types of geological deformation"
    2: a body of water that has been created by deliberately
       flooding an area; "many campsites were located near the
       flowage"
    3: the act of flooding; filling to overflowing [syn: {flood},
       {flowage}]

from The Collaborative International Dictionary of English v.0.48

Flowage \Flow"age\ (?; 48), n.
   An overflowing with water; also, the water which thus
   overflows.
   [1913 Webster]