Of most importance in any analysis of a reservoir is to determine its effect on the downstream water quality. It must be pointed out, however, that the effects or benefits of low flow augmentation are not realized immediately downstream of a reservoir (within a mile). Those benefits are felt much farther downstream, The study at Belwood Reservoir compares the effects immediately downstream. The following format is arranged to contrast inflowing. water and outflowing water. The 3 reservoir stations are discussed separately .with specific reference to the change in conditions of inflow water and the reservoir effect on water quality downstream.