A good sprinkler distribution profile will have a greater depth of application near the sprinkler head and the profile will decrease in a reasonably uniform rate to the most distance point of throw. Well spaced overlapping sprinklers will place the high application rate of sprinkler A about at the point of the lowest application rate of sprinkler B. An overlap of 40% to 60% as described previously gives this pattern. Summing up the contribution of all sprinklers will show a profile of a uniform total application.
A poor sprinkler distribution profile will have, for example, a high application rate both close to the sprinkler head and at its outer radius and a low application rate in between. This profile makes it difficult to overlap sprinkler profiles to get a uniform pattern.