Yes. it would. If you can get ot established it will happily sit there through a long hot summer. As for irrigation and water requirements, it really depends whether your talking flood or spray. Flood uses around 1 megaliter per acre per watering. 2 watering 2 weeks apart per cut is required. As for spray, that also depends. I might use 8 laps of a pivot over a cut and that uses roughly 32 megs for 65ac. All depends on in crop rainfall as well. Trouble you will have is without irrigation during your dry season you will be trying to make hay during your wet season. Not ideal for curing as you will need 4 to 5 days after cutting. And that's without humidity. Watering in your dry season will give you the best opportunity to make good hay without weather damage.