Poa, bent, fescue, bermudagrass, any turfgrass you can name, all have one thing in common. If, during growing conditions, they are deprived of water for extended periods of time they will die. No question. I have witnessed it with my own eyes. It only varies for each species how long it might tolerate the stress.
The number of irrigation lines, or even sprinkler heads, is not the determining factor for the amount of water used and less so for irrigation efficiency. What matters most is size of the area being covered.
Say you have a fairway 20 meters wide, which is just about the watering radius of a standard sprinkler head, and say you wanted to water only the fairway and not the rough. A single row of sprinklers down the center, spaced at 20m so there is 100% overlap in the middle, will leave gaps on the outer edges where the arcs don’t meet. Also, at most, any area is covered by no more than two sprinklers, which limits the extent to which the cycles can be manipulated for maximum efficiency, or distribution uniformity. Any piece of ground is subject to varying effects of wind, sun, shade, differing soils, proximity of drains, and elevations that all require subtle adjustments in timing irrigation cycles. It’s preferable to have single head control as well, rather than two, three, or four heads working in series.
What would work better, both for the playing surfaces, and for water use efficiency, would be two rows of part-circles throwing in from both sides. Better yet would be a center row complemented by outside rows of part-circles. Each sprinkler would need to be on for only a fraction of the time of the more basic single row system. .
It may seem counter-intuitive, but more sprinklers over a given area, properly managed, will actually save water and improve playing conditions.
And no, I have no commercial interest in selling irrigation supplies.