A Nutrient Loading Model for Lake Winnipeg to estimate the impacts of various nutrient management strategies.
MetadataShow full item record
Over the past few decades, scientists have observed signifi cant changes in the state of Lake Winnipeg, which has in turn spawned an environmental awareness for many Manitobans and Canadians. Since the 1990s, algal blooms on this great lake have increased in size, frequency and intensity: a threatening indicator of a deteriorating ecosystem. While these algal blooms have often been linked to increased human activities in the watershed (e.g. municipal sewage, septic fi elds, industrial discharge, livestock manure, agriculture, urban runoff) , climate related events may be having a more signifi cant and pressing infl uence on their occurrence and extent . We employ a STELLA based nutrient loading model which simulates lake nutrient concentrations (carbon, nitrogen and phosphorus) from 1913 to 2006 based on historical river inputs. In addition, we then use the same model to predict future lake concentrations based on various fl ow regimes as well as to estimate the impact of various proposed nutrient management strategies