Probably grow in both the creek and the lake. They're really tough little guys as nymphs and can tolerate flooded fields and even sewage ponds. Excellent examples of being able to make it in nearly every freshwater environment.
These larvae were found in the Russian River in moderate to fast flows. They prefer a rocky bottom. You have to be careful putting them in with mayfly nymphs or caddis larvae as they'll eat them. Mature larvae are 16-22 mm in length (not including antennae or cerci). They are found throughout...
Curt-
I don't know If the large floods in and of themselves would be enough to lower insect populations very much or over long periods but the siltation certainly would. Although over a longer period of time you might end up with a relatively large population of different species that favor silt...