The effects of headwater reservoirs and channelization on invertebrate drift in Piedmont streams

Channeled streams tended to have higher drift densities and lower benthic standing crop densities than unchanneled streams. Drift densities increased markedly below a small flood control impoundment as the result of the influx of large numbers of organisms of limnetic origin. The density of these organisms in the drift decreased rapidly as the distance downstream from the reservoir increased.