Pls. can you advice to me about our specific case:
Since our project in VietNam, so, for landscaping irrigation here, client doesn't apply any system as sprinkler or Drip, they just install a available valve and when need to irrigate, a man will connect piping with this valve and irrigate by manual.
Our location within the area have high rainfall, so, if we apply this method, it's take some advantages.

But, I wonder that, if we apply this method, how we can determine Irrigation efficiency IE???
Hope to receive your reply soon.