I'm reading Leonard Wright's The Dry Fly as a Living Insect. In his book he briefly mentions that when rivers get flooded much of the insect population gets washed out.

I wasn't aware of this. As it turns out, a river I often fish was heavily flooded in April. It seems to me that I've seen a lot less insect - and trout - activity this season. (Fishing has been horrible.) I'm now wondering if it was the flood that did the damage. If so, how does the insect population recover?

Thanks,

Randy