Plans for a postbowl national championship college football game were revealed yesterday by a group in New York claiming such a game could generate $10 million in revenues and more than $2 million for postgraduate scholarships.

"The country wants a national champion to emerge from the field rather than the polls," said Richie Phillips, executive director of the newly formed National Collegiate Football Foundation, a nonprofit organization seeking to stage the game.

"I agree with that concept. Football is the only sport without a played-for national champion," said Phillips, a Philadelphia lawyer who serves as counsel to major league baseball umpires and National Basketball Association officials.

Phillips said the foundation, whose board of directors includes entertainers Bill Cosby and Jack Lemmon, would name a committee of ex-football coaches and Heisman Trophy winners to select the teams for the championship game from among the winners of the four major bowl games played Jan. 1. The new game would be played on the second weekend in January, prior to the Super Bowl.

Revenue from the game would be used to fund postgraduate scholarships for athletes, Phillips said.

Usually, approval for a postseason game requires a two-year certification process by the NCAA. Phillips said the foundation had asked the NCAA to expedite its consideration and suggested that if approval is received, a game could be arranged for January 1985. "We have checked and the Rose Bowl is available," he said.

However, Dave Cawood, assistant executive director of the NCAA, said, "It is virtually impossible for 1985. It would require waiving the bylaw which restricts institutions to one postseason game. That could only happen at the NCAA convention Jan. 14-16." . . .

Georgia Athletic Director Vince Dooley has confirmed that the NCAA is investigating that school's women's basketball program as well as the men's football and basketball programs, as was previously reported. Dooley said the investigation has been going on since last summer . . .

Joe Purzycki, head coach at Delaware State, has been named to replace Challace McMillin as James Madison's football coach. McMillin was fired last month after a 13-year tenure.