01-21-2013, 11:53 AM
I have pondered how much difference the first flush system makes, given that rain is so frequent and evenly distributed in Puna. Granted there are times when the rain is almost continuous but most of the time it is intermittent. The question not yet addressed is how and when the contaminants are applied. Do the birds perch on your roof more when it is not raining? If so then a first flush is a good idea since the contaminant cycle dovetails with the rain cycle even if there are several cycles per day. Other contaminants such as leaves are wind driven. During storms wind and rain go together but what about our normal daily rain?