Crossword-Solution: RUNOFF 6 letters, 32 clues 🏆 scrabble score: 12

The gray eminence of UNIX text processing; a formatting and phototypesetting program, written originally in PDP-11 assembler and then in barely-structured early C by the late Joseph Ossana, modeled after the earlier ROFF which was in turn modeled after Multics' RUNOFF.

When this is done, the water which runs down the slopes is caught by the succession of furrows and in that way the runoff is diminished.

Runoff is checked by a sod and less water is used by a sod in mid-summer, after it has been mowed, than by a heavy cover crop.

The upper Potomac estuary from Little Falls down to the vicinity of Marshall Hall and Mount Vernon or below contains a great deal of fresh water, an accumulation made up of inflows from the river above the Fall Line, local storm runoff and tributary flows, and treated sewage returned to the tidal river.

Besides the matter of consolidating and improving treatment of collectible wastes, there are certain other diffuse and stubborn sources of pollution, as will be seen, for which good counter measures simply do not yet exist--among them are surface runoff during local storms and overflow from combined sewer systems.