A flow or current of water; the amount of water flowing.(noun)
The Century Dictionary (Public Domain)
Use "waterflow" in a sentence
"Post officials say it appeared to be colored with dye used in waterflow studies."
"CNN's Chris Lawrence reports the waterflow into New Orleans at one levee is not as bad as it looks."
"The big question: is there any confirmation that the water is still rising or have the sandbags dropped in the levee somehow managed to halt the waterflow from the lake?"