Bermuda football fields

I’m a coach at a small school. I’m told I’m in charge of setting my own irrigation schedules for the game and practice field. They are Bermuda fields. The game field is mowed with a reel mower two to three times a week, the practice field is mowed once a week with a regular mower. How much should I be irrigating these fields in this 100 degree heat? They are getting twice a week right now for 45 minutes/zone. Any help is appreciated