flowage

noun

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

Also useful for “flowage”:Unscrambler— Rearrange the letters in “flowage”