Use of flow-normalization to evaluate nutrient concentration and flux changes in Lake Champlain tributaries, 1990-2009

► Mixed trend directions seen for P and N in Lake Champlain tributaries. ► Recent decade shows reversal in N from upward to downward trends for many rivers. ► Recent decade shows reversal or reduction in magnitude of upward trends for P. ► P and N related to intensity of agricultural activities or population density. ► About 15% of targeted reduction found for flow-normalized P flux.