Any college’s civil engineering program should have courses where you can concentrate on irrigation design or do this sort of design work as your chosen project.
Hydrology is another, related, field that you can pursue.
Fascinating profession - good luck to you
The website of the website of the irrigation association they put on courses regularly am pursuing my designers accreditation.
The website of the website of the website of the irrigation auditor and am pursuing my designers accreditation.
My designers accreditation.