I don't know any other term for it other than sheet of water, unless you're talking about a waterfall?
They are called sheet tabs.They are called sheet tabs.They are called sheet tabs.They are called sheet tabs.They are called sheet tabs.They are called sheet tabs.They are called sheet tabs.They are called sheet tabs.They are called sheet tabs.They are called sheet tabs.They are called sheet tabs.
sheetflow
Sheet flow is the flow of water across a surface in a thin layer, like a sheet. It typically occurs in areas with low slope, such as flat ground or gently sloping terrain. Sheet flow is an important process in the movement of water over the land surface and can contribute to erosion and sediment transport.
Sheet erosion
A thin sheet of wood is called veneer.
a sheet of ice is called a glacier
The lines on a music sheet are called staff lines.
Chart Sheet
One side of a sheet of paper is called a "page."
the sheet-like arrangement of cells is called tissues...
A sheet of glass is called a pane.
The answer is foil