Fig. 6. The ecological goals for a dam re-operation project on the Savannah River in the southeastern United States are summarized in this diagram. Specific ecological outcomes are noted in each box, which is linked to particular levels and durations of water release from the dam during specified times of the year, or during various water year types, e.g., wet, average, dry. Many of the ecological goals represented in this diagram were championed by economic or social interests, such as commercial fishing (adapted fom Richter et al. 2006).