Manual/ Automatic irrigation required

I am working on an Outpatient clinic in Riyadh, KSA. As per the climate of this region, water is must for the landscaping. Irrgation required for the landscaping as per Option-1 should be automatic or manual? Might be there will be very limited trees and planters which could be irrigated manually with very less water and no need for automatic irrigation. Other thing is landscaping on the outside is the only requirement under this credit or planters on the inside of the building should also contribute. Thanks,