[dsnuh]

What about River? Looks like there is an R package and an abandoned Apache project that use the name, but maybe not that confusing given context.

[frankmcsherry]

It's a stream processing language:

http://hirzels.com/martin/papers/spe16-river.pdf

[dsnuh]

Okay...

Tribute Tributary Brook Flow Rapid Affluent Alluvial Aquaduct Niagara Iguaza Aquifer Flood Flashflood Headwater Tailwater Lotic Hydro Meander Outfall Spillway Watershed Weir