10/4/2011 3:10 PM
Irrigation layout on square spacing or triangular spacing both work, I like triangular better on the golf course, however no matter how good you are you will end up with some square spacing areas. You may have to do some rain cups to understand any areas that give you a problem. Then I would look at the nozzles and even moving some head if needed. With square spacing you will be likely to see problem wet and dry spots than you will with good triangle spacing. A lot of information is on the web dealing with this.
On my course here, done some years ago the greens are spaced from 16 meters to 22 meters (20m was perfect) not square or rectangular just heads around the greens. I have a few areas wetter than I would like and a few dryer, I have tried nozzles with some luck and I have moved some heads. Most areas it did not seem to matter and I do not have dry or wet problems even knowing the water amounts are wrong, it still works. In the computer I have set each head on a percentage of a fixed number, I use 20 min. as a base line on greens. I have heads (20% of the heads) at up to 150% or down to 30% of normal. This balances things just fine 99% of the time.
Keith Pegg
Zama Golf Japan